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  • 北京元坤伟业科技有限公司

         该会员已使用本站17年以上

  • MAX3087ECSA+
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  • 深圳市正信鑫科技有限公司

     该会员已使用本站12年以上
  • MAX3087ECSA+ 现货库存
  • 数量6185 
  • 厂家Maxim 
  • 封装原厂封装 
  • 批号22+ 
  • 原装正品★真实库存★价格优势★欢迎来电洽谈
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  • 深圳市欧昇科技有限公司

     该会员已使用本站10年以上
  • MAX3087ECSA+ 现货库存
  • 数量100 
  • 厂家MAXIM 
  • 封装原包 
  • 批号2021+ 
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  • 深圳市芯福林电子有限公司

     该会员已使用本站15年以上
  • MAX3087ECSA+
  • 数量65000 
  • 厂家MAXIM 
  • 封装原厂封装 
  • 批号23+ 
  • 真实库存全新原装正品!代理此型号
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  • 深圳市芯鹏泰科技有限公司

     该会员已使用本站8年以上
  • MAX3087ECSA+
  • 数量7536 
  • 厂家Maxim Integrated 
  • 封装8-SOIC 
  • 批号23+ 
  • 接口驱动器接收器收发器
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  • 深圳市恒达亿科技有限公司

     该会员已使用本站12年以上
  • MAX3087ECSA+
  • 数量3000 
  • 厂家MAXIM 
  • 封装SOP8 
  • 批号25+ 
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  • 深圳市高捷芯城科技有限公司

     该会员已使用本站11年以上
  • MAX3087ECSA+T
  • 数量9555 
  • 厂家ADI(亚德诺)/MAXIM(美信) 
  • 封装SOP-8 
  • 批号23+ 
  • 支持大陆交货,美金交易。原装现货库存。
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  • 深圳市得捷芯城科技有限公司

     该会员已使用本站11年以上
  • MAX3087ECSA+
  • 数量3409 
  • 厂家MAXIM/美信 
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  • 批号23+ 
  • 原装现货,当天可交货,原型号开票
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  • 集好芯城

     该会员已使用本站13年以上
  • MAX3087ECSA+
  • 数量13217 
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  • 万三科技(深圳)有限公司

     该会员已使用本站2年以上
  • MAX3087ECSA+T
  • 数量660000 
  • 厂家Maxim Integrated 
  • 封装N.SO 
  • 批号23+ 
  • 支持实单/只做原装
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  • 深圳市晶美隆科技有限公司

     该会员已使用本站14年以上
  • MAX3087ECSA+
  • 数量11530 
  • 厂家Maxim IC 
  • 封装SOIC-8 
  • 批号23+ 
  • 全新原装现货热卖
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  • 深圳市华斯顿电子科技有限公司

     该会员已使用本站16年以上
  • MAX3087ECSA+
  • 数量72831 
  • 厂家MAXIM 
  • 封装SOP8 
  • 批号2023+ 
  • 绝对原装正品现货,全新深圳原装进口现货
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  • 北京齐天芯科技有限公司

     该会员已使用本站15年以上
  • MAX3087ECSA+
  • 数量100000 
  • 厂家Maxim 
  • 封装N/A 
  • 批号2024+ 
  • 原装正品,假一罚十
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  • 010-62104931 QQ:2880824479QQ:1344056792
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  • 深圳市宏捷佳电子科技有限公司

     该会员已使用本站12年以上
  • MAX3087ECSA+T
  • 数量12300 
  • 厂家MAXIM/美信 
  • 封装SOP8 
  • 批号24+ 
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  • 深圳市晶美隆科技有限公司

     该会员已使用本站14年以上
  • MAX3087ECSA+
  • 数量15735 
  • 厂家Maxim IC 
  • 封装SOIC-8 
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  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • MAX3087ECSA+
  • 数量3625 
  • 厂家ADI/MAXIM 
  • 封装8-SOIC(0.154,3.90mm 宽) 
  • 批号2023+ 
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  • 北京元坤伟业科技有限公司

     该会员已使用本站17年以上
  • MAX3087ECSA+
  • 数量5000 
  • 厂家Maxim 
  • 封装 
  • 批号2024+ 
  • 百分百原装正品,现货库存
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  • 深圳市正信鑫科技有限公司

     该会员已使用本站12年以上
  • MAX3087ECSA+
  • 数量9775 
  • 厂家Maxim 
  • 封装原厂封装 
  • 批号22+ 
  • 原装正品★真实库存★价格优势★欢迎来电洽谈
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  • 深圳市华芯盛世科技有限公司

     该会员已使用本站13年以上
  • MAX3087ECSA+
  • 数量865000 
  • 厂家MAXIM/美信 
  • 封装SOP8 
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  • 一级代理,原装特价现货!
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  • 深圳市恒意法科技有限公司

     该会员已使用本站17年以上
  • MAX3087ECSA+
  • 数量11494 
  • 厂家Analog Devices Inc./Maxim Integrated 
  • 封装8-SOIC(0.154,3.90mm 宽) 
  • 批号21+ 
  • 正规渠道/品质保证/原装正品现货
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  • 深圳市惊羽科技有限公司

     该会员已使用本站11年以上
  • MAX3087ECSA+
  • 数量9328 
  • 厂家MAXIM-美信 
  • 封装SOP-8.贴片 
  • 批号▉▉:2年内 
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  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • MAX3087ECSA+
  • 数量3265 
  • 厂家MAXIM 
  • 封装SOP-8 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
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  • 深圳市宏世佳电子科技有限公司

     该会员已使用本站13年以上
  • MAX3087ECSA+
  • 数量3625 
  • 厂家ADI/MAXIM 
  • 封装8-SOIC(0.154,3.90mm 宽) 
  • 批号2023+ 
  • 全新原厂原装产品、公司现货销售
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  • 0755-82556029 QQ:2881894392QQ:2881894393
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  • 深圳市宗天技术开发有限公司

     该会员已使用本站10年以上
  • MAX3087ECSA+
  • 数量1392 
  • 厂家MAXIM/美信 
  • 封装SOP8 
  • 批号21+ 
  • 宗天技术 原装现货/假一赔十
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  • 0755-88601327 QQ:444961496QQ:2824256784
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  • 深圳市赛矽电子有限公司

     该会员已使用本站13年以上
  • MAX3087ECSA+T
  • 数量50000 
  • 厂家MAXIM 
  • 封装SOP8 
  • 批号最新 
  • 全新原装,优势库存
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  • 0755-83040986 QQ:3397630681
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  • 深圳市富莱微科技有限公司

     该会员已使用本站6年以上
  • MAX3087ECSA+
  • 数量6398 
  • 厂家Maxim Integrated 
  • 封装8-SOIC 
  • 批号20+ 
  • 进口原装,公司现货
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  • 0755-83210149 QQ:1968343307QQ:2885835292
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  • 深圳市欧瑞芯科技有限公司

     该会员已使用本站11年以上
  • MAX3087ECSA+
  • 数量9500 
  • 厂家Maxim(美信) 
  • 封装8-SOIC(0.154,3.90mm 宽) 
  • 批号24+ 
  • 绝对原装正品,可开专票,欢迎采购!!!
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  • 深圳市鹏睿康科技有限公司

     该会员已使用本站16年以上
  • MAX3087ECSA+
  • 数量1200 
  • 厂家MAXIM 
  • 封装只做原装 
  • 批号23+ 
  • 原装现货假一赔万,原包原标,支持实单
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  • 深圳威尔运电子有限公司

     该会员已使用本站10年以上
  • MAX3087ECSA+
  • 数量100 
  • 厂家N/A 
  • 封装N/A 
  • 批号16+ 
  • 正品原装,假一罚十!
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  • 万三科技(深圳)有限公司

     该会员已使用本站2年以上
  • MAX3087ECSA+
  • 数量6500000 
  • 厂家Maxim Integrated 
  • 封装原厂原装 
  • 批号22+ 
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  • 深圳市科雨电子有限公司

     该会员已使用本站9年以上
  • MAX3087ECSA+
  • 数量4854 
  • 厂家MAXIM 
  • 封装SOP-8 
  • 批号24+ 
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  • 深圳亿景融荣科技有限公司

     该会员已使用本站2年以上
  • MAX3087ECSA+
  • 数量100 
  • 厂家AD 
  • 封装Small-Outline IC, Narrow (0.15in) 
  • 批号24+ 
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  • 深圳市创思克科技有限公司

     该会员已使用本站2年以上
  • MAX3087ECSA+T
  • 数量8000 
  • 厂家MAXIM 
  • 封装SOP8 
  • 批号21+ 
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产品型号MAX3087ECSA+的概述

MAX3087ECSA+芯片概述 MAX3087ECSA+是一款由 Maxim Integrated 设计和生产的高性能、低功耗 RS-485/RS-422 收发器。其主要应用于工业自动化、数据采集、远程监控等领域。由于其具备高抗干扰能力及长距离传输能力,MAX3087ECSA+ 被广泛应用于通信系统中。该芯片特别适合在对环境噪声要求较高的应用中使用,其低功耗特性使得节能兼顾性能。 MAX3087ECSA+ 允许多达256个设备在同一网络中并联操作,能够有效解決多主机衝突的问题。其传输速率可达1 Mbps,并提供广泛的工作电源范围,从3.0V到5.5V,适合不同应用场景。 MAX3087ECSA+的详细参数 - 工作电压: 3.0V至5.5V - 传输速率: 1 Mbps - 温度范围: -40°C至+85°C - 驱动能力: ±250mA - 输入输入损耗: 1.5V(最大),典型值...

产品型号MAX3087ECSA+的Datasheet PDF文件预览

MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
General Description  
Next Generation Device Features  
The MAX3080–MAX3089 high-speed transceivers for  
RS-485/RS-422 communication contain one driver and  
one receiver. These devices feature fail-safe circuitry,  
which guarantees a logic-high receiver output when the  
receiver inputs are open or shorted. This means that  
the receiver output will be a logic high if all transmitters  
on a terminated bus are disabled (high impedance).  
The MAX3080/MAX3081/MAX3082 feature reduced  
slew-rate drivers that minimize EMI and reduce reflec-  
tions caused by improperly terminated cables, allowing  
error-free data transmission up to 115kbps. The  
MAX3083/MAX3084/MAX3085 offer higher driver out-  
put slew-rate limits, allowing transmit speeds up to  
500kbps. The MAX3086/MAX3087/MAX3088’s driver  
slew rates are not limited, making transmit speeds up  
to 10Mbps possible. The MAX3089’s slew rate is  
selectable between 115kbps, 500kbps, and 10Mbps  
by driving a selector pin with a single three-state driver.  
For Fault-Tolerant Applications:  
MAX3430: 80V Fault-Protected, Fail-Safe, 1/4-  
Unit Load, +3.3V RS-485 Transceiver  
For Low-Voltage Applications:  
MAX3362: +3.3V, High-Speed, RS-485/RS-422  
Transceiver in a SOT23 Package  
For Multiple Transceiver Applications:  
MAX3030E–MAX3033E: 15kV ESD-Protected,  
+3.3V, Quad, RS-422 Transmitters  
MAX3040–MAX3045: 10kV ESD-Protected, Quad,  
+5V, RS-485/RS-422 Transmitters  
Applications  
RS-422/RS-485 Communications  
Level Translators  
These transceivers typically draw 375µA of supply  
current when unloaded, or when fully loaded with the  
drivers disabled.  
Transceivers for EMI-Sensitive Applications  
Industrial-Control Local Area Networks  
All devices have a 1/8-unit-load receiver input imped-  
ance that allows up to 256 transceivers on the bus. The  
MAX3082/MAX3085/MAX3088 are intended for half-  
duplex communications, while the MAX3080/MAX3081/  
MAX3083/MAX3084/MAX3086/MAX3087 are intended  
for full-duplex communications. The MAX3089 is selec-  
table between half-duplex and full-duplex operation. It  
also features independently programmable receiver  
and transmitter output phase via separate pins.  
Ordering Information  
PART  
TEMP RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
14 SO  
MAX3080CSD  
MAX3080CPD  
MAX3080ESD  
MAX3080EPD  
14 Plastic DIP  
14 SO  
14 Plastic DIP  
Ordering Information continued at end of data sheet.  
Selection Table  
Data  
Rate  
(Mbps)  
Slew  
Rate  
Limited  
Low-  
Power  
Shutdown  
Receiver/ Quiescent Transceivers  
Industry-  
Standard  
Pinout  
Half/Full  
Duplex  
Pin  
Count  
Part  
Driver  
Current  
(µA)  
On  
Enable  
Bus  
MAX3080  
MAX3081  
MAX3082  
MAX3083  
MAX3084  
MAX3085  
MAX3086  
MAX3087  
MAX3088  
Full  
Full  
Half  
Full  
Full  
Half  
Full  
Full  
Half  
0.115  
0.115  
0.115  
0.5  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
No  
Yes  
No  
Yes  
No  
375  
375  
375  
375  
375  
375  
375  
375  
375  
375  
256  
256  
256  
256  
256  
256  
256  
256  
256  
256  
14  
8
75180  
75179  
75176  
75180  
75179  
75176  
75180  
75179  
75176  
75180*  
Yes  
Yes  
No  
Yes  
Yes  
No  
8
14  
8
0.5  
0.5  
Yes  
Yes  
No  
Yes  
Yes  
No  
8
10  
14  
8
10  
No  
10  
No  
Yes  
Yes  
Yes  
Yes  
8
MAX3089 Selectable Selectable Selectable  
14  
*Pin-compatibith 75180, with additional features implemented using pins 1, 6, 8, and 13.  
For pricing, delivery, and ordering information, please contact Maxim Direct  
19-1138; Rev 3; 12/05  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
ABSOLUTE MAXIMUM RATINGS  
Supply Voltage (V ) ............................................................+7V  
Continuous Power Dissipation  
CC  
Control Input Voltage (RE, DE)...................-0.3V to (V  
Special Input Voltage  
(H/F, SRL, TXP, RXP)..................................-0.3V to (V  
Driver Input Voltage (DI).............................-0.3V to (V  
Driver Output Voltage (A, B, Y, Z)........................................ 13V  
Receiver Input Voltage (A, B) .............................................. 13V  
Receiver Input Voltage, Full Duplex (A, B) .......................... 25V  
+ 0.3V)  
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ...727mW  
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW  
14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ....800mW  
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW  
Operating Temperature Ranges  
MAX308_C_ _ .....................................................0°C to +70°C  
MAX308_E_ _...................................................-40°C to +85°C  
Storage Temperature Range.............................-65°C to +150°C  
Lead Temperature (soldering, 10s) .................................+300°C  
CC  
+ 0.3V)  
+ 0.3V)  
CC  
CC  
Receiver Output Voltage (RO)....................-0.3V to (V  
+ 0.3V)  
CC  
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional  
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to  
absolute maximum rating conditions for extended periods may affect device reliability.  
DC ELECTRICAL CHARACTERISTICS  
(V  
= +5V 5%, T = T  
A
to T  
, unless otherwise noted. Typical values are at V  
= +5V and T = +25°C.) (Note 1)  
CC A  
CC  
MIN  
MAX  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
DRIVER  
Differential Driver Output  
(no load)  
V
V
Figure 5  
5
V
V
OD1  
Figure 5, R = 50(RS-422)  
Figure 5, R = 27(RS-485)  
2.0  
1.5  
Differential Driver Output  
OD2  
Change in Magnitude of  
Differential Output Voltage  
(Note 2)  
V  
Figure 5, R = 50or R = 27Ω  
0.2  
V
OD  
Driver Common-Mode Output  
Voltage  
V
Figure 5, R = 50or R = 27Ω  
Figure 5, R = 50or R = 27Ω  
3
V
V
OC  
Change In Magnitude of  
Common-Mode Voltage (Note 2)  
V  
0.2  
OC  
Input High Voltage  
Input Low Voltage  
V
2.0  
10  
V
V
DE, DI, RE, H/F, TXP, RXP  
DE, DI, RE, H/F, TXP, RXP  
IH1  
V
0.8  
IL1  
MAX3080–MAX3085, and MAX3089 with  
SRL = V or unconnected  
DI Input Hysteresis  
SRL Input Current  
V
100  
mV  
µA  
HYS  
CC  
I
I
2
DE, DI, RE  
IN1  
IN2  
40  
H/F, TXP, RXP, internal pulldown  
Input High Voltage  
Input Middle Voltage  
Input Low Voltage  
V
SRL  
V
- 0.8  
CC  
V
V
V
IH2  
V
SRL (Note 3)  
SRL  
0.4V  
0.6V  
CC  
IM2  
CC  
V
0.8  
75  
IL2  
SRL = V  
CC  
SRL Input Current  
I
I
µA  
µA  
µA  
IN3  
SRL = GND (Note 3)  
-75  
V
V
V
V
= 12V  
= -7V  
= 12V  
= -7V  
125  
-75  
IN  
IN  
IN  
IN  
Input Current (A and B)  
Full Duplex  
DE = GND,  
IN4  
V
= GND or 5.25V  
CC  
125  
Output Leakage (Y and Z)  
Full Duplex  
DE = GND,  
= GND or 5.25V  
I
O
V
CC  
-100  
-250  
-7V V  
0V V  
0V V  
V  
CC  
12V  
V  
CC  
OUT  
Driver Short-Circuit Output  
Current (Note 4)  
V
OD1  
250  
mA  
OUT  
OUT  
25  
2
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
DC ELECTRICAL CHARACTERISTICS (continued)  
(V  
= +5V 5%, T = T  
A
to T  
, unless otherwise noted. Typical values are at V  
= +5V and T = +25°C.) (Note 1)  
CC A  
CC  
MIN  
MAX  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
RECEIVER  
Receiver Differential Threshold  
Voltage  
Receiver Input Hysteresis  
Receiver Output High Voltage  
Receiver Output Low Voltage  
V
-7V V  
+12V  
CM  
-200  
-125  
25  
-50  
mV  
TH  
V  
mV  
V
V
TH  
V
I
I
= -4mA, V = -50mV  
= 4mA, V = -200mV  
V
-1.5  
OH  
O
ID  
CC  
V
OL  
0.4  
1
O
ID  
Three-State Output Current at  
Receiver  
I
0.4V V 2.4V  
µA  
kΩ  
mA  
OZR  
O
Receiver Input Resistance  
R
-7V V  
+12V  
CM  
96  
IN  
Receiver Output Short-Circuit  
Current  
I
0V V  
V  
CC  
7
95  
OSR  
RO  
SUPPLY CURRENT  
No load,  
RE = DI = GND  
DE = V  
430  
375  
475  
420  
900  
600  
CC  
µA  
DE = GND  
DE = V  
or V , SRL = V  
CC  
CC  
Supply Current  
I
CC  
No load,  
RE = DI = GND  
1000  
800  
CC  
µA  
µA  
DE = GND  
or V , SRL = GND  
CC  
Supply Current in Shutdown  
Mode  
I
DE = GND, V = V  
CC  
0.001  
10  
SHDN  
RE  
Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referred to device  
ground unless otherwise noted.  
Note 2: V  
and V  
are the changes in V  
and V , respectively, when the DI input changes state.  
OD  
OC  
OD OC  
Note 3: The SRL pin is internally biased to V / 2 by a 100k/100kresistor divider. It is guaranteed to be V / 2 if left  
CC  
CC  
unconnected.  
Note 4: Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during  
current limiting.  
Maxim Integrated  
3
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
SWITCHING CHARACTERISTICS—MAX3080–MAX3082, and MAX3089 with  
SRL = Unconnected  
(V  
CC  
= +5V 5%, T = T  
A
to T  
, unless otherwise noted. Typical values are at V  
= +5V and T = +25°C.)  
CC A  
MIN  
MAX  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
500  
500  
TYP  
2030  
2030  
MAX  
2600  
2600  
UNITS  
t
t
DPLH  
DPHL  
Figures 7 and 9, R  
= 54,  
= 54,  
= 54,  
DIFF  
Driver Input to Output  
ns  
C
= C = 100pF  
L1  
L2  
Driver Output Skew  
Figures 7 and 9, R  
DIFF  
t
-3  
200  
ns  
ns  
DSKEW  
C
L1  
= C = 100pF  
t
- t  
L2  
| DPLH DPHL |  
Figures 7 and 9, R  
DIFF  
Driver Rise or Fall Time  
t
, t  
DR DF  
667  
115  
1320  
2500  
C
L1  
= C = 100pF  
L2  
Maximum Data Rate  
f
kbps  
ns  
MAX  
Driver Enable to Output High  
Driver Enable to Output Low  
Driver Disable Time from Low  
Driver Disable Time from High  
t
Figures 8 and 10, C = 100pF, S2 closed  
3500  
3500  
100  
DZH  
L
t
Figures 8 and 10, C = 100pF, S1 closed  
ns  
DZL  
DLZ  
DHZ  
L
t
Figures 8 and 10, C = 15pF, S1 closed  
ns  
L
t
Figures 8 and 10, C = 15pF, S2 closed  
100  
ns  
L
t
t
,
Figures 11 and 13; V  
2.0V;  
rise and fall time of V 15ns  
RPLH  
|
ID |  
Receiver Input to Output  
127  
3
200  
30  
ns  
ns  
RPHL  
ID  
t
- t  
Differential  
Figures 11 and 13; V  
2.0V;  
rise and fall time of V 15ns  
| RPLH RPHL |  
Receiver Skew  
|
ID |  
t
RSKD  
ID  
Receiver Enable to Output Low  
t
Figures 6 and 12, C = 100pF, S1 closed  
20  
20  
20  
50  
50  
50  
ns  
ns  
ns  
RZL  
L
Receiver Enable to Output High  
Receiver Disable Time from Low  
t
Figures 6 and 12, C = 100pF, S2 closed  
L
RZH  
t
Figures 6 and 12, C = 100pF, S1 closed  
L
RLZ  
Receiver Disable Time from  
High  
t
Figures 6 and 12, C = 100pF, S2 closed  
L
20  
50  
ns  
ns  
ns  
RHZ  
Time to Shutdown  
t
(Note 5)  
50  
200  
600  
SHDN  
Driver Enable from Shutdown to  
Output High  
t
t
Figures 8 and 10, C = 15pF, S2 closed  
6000  
DZH(SHDN)  
L
Driver Enable from Shutdown to  
Output Low  
t
Figures 8 and 10, C = 15pF, S1 closed  
6000  
3500  
3500  
ns  
ns  
ns  
DZL(SHDN)  
L
Receiver Enable from Shutdown  
to Output High  
Figures 6 and 12, C = 100pF, S2 closed  
RZH(SHDN)  
L
Receiver Enable from Shutdown  
to Output Low  
t
Figures 6 and 12, C = 100pF, S1 closed  
L
RZL(SHDN)  
4
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
SWITCHING CHARACTERISTICS—MAX3083–MAX3085, and MAX3089 with SRL = V  
CC  
(V  
= +5V 5%, T = T  
A
to T  
, unless otherwise noted. Typical values are at V  
= +5V and T = +25°C.)  
CC A  
CC  
MIN  
MAX  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
250  
250  
TYP  
720  
720  
MAX  
1000  
1000  
UNITS  
t
t
DPLH  
DPHL  
Figures 7 and 9, R  
= 54,  
= 54,  
= 54,  
DIFF  
Driver Input to Output  
ns  
C
= C = 100pF  
L1  
L2  
Driver Output Skew  
Figures 7 and 9, R  
DIFF  
t
-3  
100  
750  
ns  
ns  
DSKEW  
C
L1  
= C = 100pF  
t
- t  
L2  
| DPLH DPHL |  
Figures 7 and 9, R  
DIFF  
Driver Rise or Fall Time  
t
t
200  
500  
530  
DR, DF  
C
L1  
= C = 100pF  
L2  
Maximum Data Rate  
f
kbps  
ns  
MAX  
Driver Enable to Output High  
Driver Enable to Output Low  
Driver Disable Time from Low  
Driver Disable Time from High  
t
Figures 8 and 10, C = 100pF, S2 closed  
2500  
2500  
100  
DZH  
L
t
Figures 8 and 10, C = 100pF, S1 closed  
ns  
DZL  
DLZ  
DHZ  
L
t
Figures 8 and 10, C = 15pF, S1 closed  
ns  
L
t
Figures 8 and 10, C = 15pF, S2 closed  
100  
ns  
L
t
t
,
Figures 11 and 13; V  
2.0V;  
ID  
|
RPLH  
|
Receiver Input to Output  
127  
3
200  
30  
ns  
ns  
rise and fall time of V 15ns  
RPHL  
ID  
t
- t  
Differential  
Figures 11 and 13; V  
rise and fall time of V 15ns  
ID  
2.0V;  
ID  
|
RPLH RPHL  
|
|
|
t
RSKD  
Receiver Skew  
Receiver Enable to Output Low  
t
Figures 6 and 12, C = 100pF, S1 closed  
20  
20  
20  
50  
50  
50  
ns  
ns  
ns  
RZL  
L
Receiver Enable to Output High  
Receiver Disable Time from Low  
t
Figures 6 and 12, C = 100pF, S2 closed  
L
RZH  
t
Figures 6 and 12, C = 100pF, S1 closed  
L
RLZ  
Receiver Disable Time from  
High  
t
Figures 6 and 12, C = 100pF, S2 closed  
L
20  
50  
ns  
RHZ  
Time to Shutdown  
t
(Note 5)  
50  
200  
600  
ns  
ns  
SHDN  
Driver Enable from Shutdown to  
Output High  
t
t
Figures 8 and 10, C = 15pF, S2 closed  
4500  
DZH(SHDN)  
L
Driver Enable from Shutdown to  
Output Low  
t
Figures 8 and 10, C = 15pF, S1 closed  
4500  
ns  
DZL(SHDN)  
L
Receiver Enable from Shutdown  
to Output High  
Figures 6 and 12, C = 100pF, S2 closed  
3500  
3500  
ns  
ns  
RZH(SHDN)  
L
Receiver Enable from Shutdown  
to Output Low  
t
Figures 6 and 12, C = 100pF, S1 closed  
L
RZL(SHDN)  
Maxim Integrated  
5
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
SWITCHING CHARACTERISTICS—MAX3086–MAX3088, and MAX3089 with SRL = GND  
(V  
CC  
= +5V 5%, T = T  
A
to T  
, unless otherwise noted. Typical values are at V  
= +5V and T = +25°C.)  
CC A  
MIN  
MAX  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
34  
MAX  
60  
UNITS  
t
t
DPLH  
DPHL  
Figures 7 and 9, R  
= 54,  
= 54,  
= 54,  
DIFF  
Driver Input to Output  
ns  
C
= C = 100pF  
L1  
L2  
34  
60  
Driver Output Skew  
Figures 7 and 9, R  
DIFF  
t
-2.5  
14  
10  
25  
ns  
ns  
DSKEW  
C
= C = 100pF  
t
- t  
L1  
L2  
| DPLH DPHL |  
Figures 7 and 9, R  
DIFF  
Driver Rise or Fall Time  
t
t
DR, DF  
C
= C = 100pF  
L1  
L2  
Maximum Data Rate  
f
10  
Mbps  
ns  
MAX  
Driver Enable to Output High  
Driver Enable to Output Low  
Driver Disable Time from Low  
Driver Disable Time from High  
t
Figures 8 and 10, C = 100pF, S2 closed  
150  
150  
100  
100  
DZH  
L
t
Figures 8 and 10, C = 100pF, S1 closed  
ns  
DZL  
DLZ  
DHZ  
L
t
Figures 8 and 10, C = 15pF, S1 closed  
ns  
L
t
Figures 8 and 10, C = 15pF, S2 closed  
ns  
L
t
t
,
Figures 11 and 13; V  
2.0V;  
RPLH  
|
ID |  
Receiver Input to Output  
106  
0
150  
10  
ns  
ns  
rise and fall time of V 15ns  
RPHL  
ID  
t
- t  
Differential  
Figures 11 and 13; V  
2.0V;  
| RPLH RPHL |  
Receiver Skew  
|
ID |  
t
RSKD  
rise and fall time of V 15ns  
ID  
Receiver Enable to Output Low  
t
Figures 6 and 12, C = 100pF, S1 closed  
20  
20  
20  
50  
50  
50  
ns  
ns  
ns  
RZL  
L
Receiver Enable to Output High  
Receiver Disable Time from Low  
t
Figures 6 and 12, C = 100pF, S2 closed  
L
RZH  
t
Figures 6 and 12, C = 100pF, S1 closed  
L
RLZ  
Receiver Disable Time from  
High  
t
Figures 6 and 12, C = 100pF, S2 closed  
L
20  
50  
ns  
RHZ  
Time to Shutdown  
t
(Note 5)  
50  
200  
600  
250  
ns  
ns  
SHDN  
Driver Enable from Shutdown to  
Output High  
t
t
Figures 8 and 10, C = 15pF, S2 closed  
L
DZH(SHDN)  
Driver Enable from Shutdown to  
Output Low  
t
Figures 8 and 10, C = 15pF, S1 closed  
250  
ns  
DZL(SHDN)  
L
Receiver Enable from Shutdown  
to Output High  
Figures 6 and 12, C = 100pF, S2 closed  
3500  
3500  
ns  
ns  
RZH(SHDN)  
L
Receiver Enable from Shutdown  
to Output Low  
t
Figures 6 and 12, C = 100pF, S1 closed  
L
RZL(SHDN)  
Note 5: The device is put into shutdown by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the  
device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the device is guaranteed  
to have entered shutdown.  
6
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Typical Operating Characteristics  
(V  
CC  
= +5V, T = +25°C, unless otherwise noted.)  
A
NO-LOAD SUPPLY CURRENT  
vs. TEMPERATURE  
OUTPUT CURRENT  
vs. RECEIVER OUTPUT LOW VOLTAGE  
OUTPUT CURRENT  
vs. RECEIVER OUTPUT HIGH VOLTAGE  
525  
500  
60  
30  
25  
20  
15  
10  
5
A: MAX3086–MAX3088,  
MAX3089 WITH  
SRL = GND  
50  
40  
30  
20  
10  
0
475  
DE = V  
CC  
450  
425  
400  
375  
350  
A
DE = GND  
B
A
B: MAX3080–MAX3085,  
MAX3089 WITH  
B
325  
300  
SRL = OPEN OR V  
CC  
0
-60 -40 -20  
0
20 40 60 80 100  
0
1
2
3
4
5
0
1
2
3
4
5
TEMPERATURE (°C)  
OUTPUT LOW VOLTAGE (V)  
OUTPUT HIGH VOLTAGE (V)  
SHUTDOWN CURRENT  
vs. TEMPERATURE  
RECEIVER OUTPUT HIGH VOLTAGE  
vs. TEMPERATURE  
RECEIVER OUTPUT LOW VOLTAGE  
vs. TEMPERATURE  
20  
18  
4.5  
4.4  
4.3  
0.50  
0.45  
0.40  
I
RO  
= 8mA  
I
RO  
= 8mA  
16  
14  
12  
0.35  
0.30  
0.25  
4.2  
4.1  
10  
8
6
4
2
4.0  
3.9  
3.8  
0.20  
0.15  
0.10  
0
-60 -40 -20  
0
20 40 60 80 100  
-60 -40 -20  
0
20 40 60 80 100  
-60 -40 -20  
0
20 40 60 80 100  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
DRIVER PROPAGATION DELAY  
(115kbps MODE) vs. TEMPERATURE  
RECEIVER PROPAGATION DELAY  
(500kbps MODE) vs. TEMPERATURE  
RECEIVER PROPAGATION DELAY  
(10Mbps MODE) vs. TEMPERATURE  
2.20  
2.15  
2.10  
2.05  
2.00  
1.95  
140  
112  
C
= 100pF  
LOAD  
C
= 100pF  
R = 54  
LOAD  
t
110  
108  
135  
130  
106  
104  
102  
100  
98  
125  
120  
115  
96  
94  
1.90  
-60 -40 -20  
0
20 40 60 80 100  
-60 -40 -20  
0
20 40 60 80 100  
-60 -40 -20  
0
20 40 60 80 100  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
Maxim Integrated  
7
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Typical Operating Characteristics (continued)  
(V  
CC  
= +5V, T = +25°C, unless otherwise noted.)  
A
DRIVER DIFFERENTIAL OUTPUT VOLTAGE  
vs. TEMPERATURE  
DRIVER PROPAGATION DELAY  
(500kbps MODE) vs. TEMPERATURE  
60  
DRIVER PROPAGATION DELAY  
(10Mbps MODE) vs. TEMPERATURE  
1.90  
1.89  
920  
880  
840  
800  
760  
720  
680  
640  
600  
560  
520  
R = 54Ω  
t
R = 54Ω  
t
R = 54Ω  
t
55  
50  
45  
1.88  
1.87  
1.86  
1.85  
1.84  
1.83  
40  
35  
30  
25  
20  
-60 -40 -20  
0
20 40 60 80 100  
-60 -40 -20  
0
20 40 60 80 100  
-60 -40 -20  
0
20 40 60 80 100  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
DRIVER OUTPUT CURRENT  
vs. DIFFERENTIAL OUTPUT VOLTAGE  
OUTPUT CURRENT vs.  
DRIVER OUTPUT HIGH VOLTAGE  
OUTPUT CURRENT vs.  
DRIVER OUTPUT LOW VOLTAGE  
100  
-100  
-90  
-80  
-70  
140  
120  
10  
1
100  
-60  
-50  
80  
60  
-40  
-30  
40  
20  
0
0.1  
-20  
-10  
0
0.01  
0
1
2
3
4
5
-8  
-6  
-4  
-2  
0
2
4
6
0
2
4
6
8
10  
12  
DIFFERENTIAL OUTPUT VOLTAGE (V)  
OUTPUT HIGH VOLTAGE (V)  
OUTPUT LOW VOLTAGE (V)  
8
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Typical Operating Characteristics (continued)  
(V  
CC  
= +5V, T = +25°C, unless otherwise noted.)  
A
RECEIVER PROPAGATION DELAY  
MAX3080–MAX3085, AND MAX3089  
RECEIVER PROPAGATION DELAY  
MAX3086–MAX3088, AND MAX3089  
WITH SRL = OPEN OR V  
CC  
WITH SRL = GND  
MAX3080/3089 TYP-17  
MAX3080/3089 TYP-18  
V
A
- V  
2V/div  
5V/div  
B
V
A
- V  
2V/div  
5V/div  
B
RO  
RO  
50ns/div  
50ns/div  
DRIVER PROPAGATION DELAY  
MAX3080/MAX3081/MAX3082, AND MAX3089  
WITH SRL = OPEN  
MAX3080/3089 TYP-20  
DI  
5V/div  
V
Y
- V  
Z
2.5V/div  
2µs/div  
DRIVER PROPAGATION DELAY  
MAX3083/MAX3084/MAX3085, AND MAX3089  
DRIVER PROPAGATION DELAY  
MAX3086/MAX3087/MAX3088, AND MAX3089  
WITH SRL = V  
WITH SRL = GND  
CC  
MAX3080/3089 TYP-21  
MAX3080/3089 TYP-22  
DI  
5V/div  
DI  
5V/div  
V
Y
- V  
Z
2.5V/div  
V
Y
- V  
Z
2.5V/div  
500ns/div  
50ns/div  
Maxim Integrated  
9
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Pin Description  
PIN  
MAX3080 MAX3081 MAX3082  
MAX3083 MAX3084 MAX3085  
MAX3086 MAX3087 MAX3088  
MAX3089  
NAME  
FUNCTION  
HALF-  
FULL-  
HALF-  
FULL-DUPLEX  
DUPLEX DUPLEX DUPLEX  
DEVICES  
DEVICES  
MODE  
MODE  
Half/Full-Duplex Selector Pin. Connect H/F to V  
mode; connect to GND or leave unconnected for full-duplex mode.  
for half-duplex  
CC  
2
1
1
H/F  
Receiver Output. When RE is low and if A - B -50mV, RO will be  
high; if A - B -200mV, RO will be low.  
2
3
1
2
2
3
2
3
RO  
Receiver Output Enable. Drive RE low to enable RO; RO is high  
impedance when RE is high. Drive RE high and DE low to enter  
low-power shutdown mode.  
3
RE  
DE  
DI  
Driver Output Enable. Drive DE high to enable driver outputs. These  
outputs are high impedance when DE is low. Drive RE high and DE  
low to enter low-power shutdown mode.  
4
5
3
4
4
5
4
5
Driver Input. With DE high, a low on DI forces noninverting  
output low and inverting output high. Similarly, a high on DI  
forces noninverting output high and inverting output low.  
Slew-Rate-Limit Selector Pin. Connect SRL to GND for 10Mbps  
6, 7  
4
5
6
7
8
6
7
8
SRL communication rate; connect to V  
for 500kbps communication  
CC  
rate. Leave unconnected for 115kbps communication rate.  
GND Ground  
Transmitter Phase. Connect TXP to GND, or leave floating for normal  
TXP transmitter phase/polarity. Connect to V  
to invert the transmitter  
CC  
phase/polarity.  
9
5
6
7
9
9
Y
Y
Z
Z
B
B
B
Noninverting Driver Output  
10  
11  
10  
11  
Noninverting Receiver Input and Noninverting Driver Output*  
Inverting Driver Output  
10  
11  
7
Inverting Receiver Input and Inverting Driver Output*  
Inverting Receiver Input  
Receiver Input Resistors*  
Inverting Receiver Input and Inverting Driver Output  
10  
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Pin Description (continued)  
PIN  
MAX3080 MAX3081 MAX3082  
MAX3083 MAX3084 MAX3085  
MAX3086 MAX3087 MAX3088  
MAX3089  
NAME  
FUNCTION  
HALF-  
FULL-  
DUPLEX DUPLEX  
MODE  
12  
HALF-  
FULL-DUPLEX  
DUPLEX  
DEVICES  
DEVICES  
MODE  
12  
8
6
A
A
A
Noninverting Receiver Input  
Receiver Input Resistors*  
12  
Noninverting Receiver Input and Noninverting Driver Output  
Receiver Phase. Connect RXP to GND, or leave unconnected for  
13  
13  
RXP normal transmitter phase/polarity. Connect to V to invert the  
CC  
receiver phase/polarity.  
14  
1
8
14  
14  
V
Positive Supply; 4.75V V  
5.25V  
CC  
CC  
1, 8, 13  
N.C. Not Connected. Not internally connected.  
*(MAX3089 only.) In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) will still  
have a 1/8-unit load, but are not connected to the receiver.  
Function Tables  
MAX3080/MAX3083/MAX3086  
MAX3081/MAX3084/MAX3087  
TRANSMITTING  
OUTPUTS  
TRANSMITTING  
INPUT  
INPUTS  
OUTPUTS  
DI  
1
Z
0
1
Y
1
0
DE  
1
DI  
1
Z
0
1
Y
RE  
X
1
0
0
X
1
0
0
0
X
X
High-Z  
High-Z  
1
0
Shutdown  
RECEIVING  
INPUTS  
OUTPUT  
A-B  
-0.05V  
RO  
1
RECEIVING  
INPUTS  
OUTPUT  
-0.2V  
0
DE  
X
A-B  
RO  
RE  
Open/shorted  
1
0
0
0
1
1
-0.05V  
1
X
-0.2V  
0
1
X
Open/shorted  
1
X
X
High-Z  
Shutdown  
0
X = Don’t care  
Shutdown mode, driver and receiver outputs high impedance  
Maxim Integrated  
11  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Function Tables (continued)  
MAX3082/MAX3085/MAX3088  
MAX3089  
TRANSMITTING  
INPUTS  
DE  
TRANSMITTING  
OUTPUTS  
INPUTS  
OUTPUTS  
TXP  
0
DI  
1
Z
Y
RE  
X
DE  
1
DI  
1
B/Z  
A/Y  
RE  
X
1
1
1
1
0
0
0
1
0
1
1
0
0
X
0
1
0
X
1
0
1
X
1
1
0
0
1
0
0
X
X
High-Z  
High-Z  
1
X
0
1
0
Shutdown  
X
0
X
X
High-Z  
High-Z  
X
1
Shutdown  
RECEIVING  
INPUTS  
OUTPUT  
DE  
X
A-B  
RO  
RE  
RECEIVING  
INPUTS  
0
0
0
1
1
-0.05V  
1
OUTPUT  
X
-0.2V  
0
1
RXP  
DE  
X
X
X
X
0
A-B  
-0.05V  
-0.2V  
-0.05V  
-0.2V  
X
Y-Z  
X
RO  
1
H/F  
0
RE  
X
Open/shorted  
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
1
X
X
High-Z  
Shutdown  
0
X
0
0
0
X
0
0
X
1
1
-0.05V  
-0.2V  
-0.05V  
-0.2V  
1
1
0
X
0
1
0
X
0
1
0
X
1
Open/  
shorted  
0
1
0
1
0
0
1
1
0
0
0
0
X
0
X
0
X
1
1
0
0
Open/  
shorted  
X
Open/  
shorted  
X
Open/  
shorted  
X
X
X
X
X
1
1
1
0
X
X
X
X
High-Z  
Shutdown  
12  
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
V
CC  
DE  
V
CC  
RE  
TOP VIEW  
0.1µF  
4
14  
MAX3080  
MAX3083  
MAX3086  
N.C.  
RO  
1
2
3
4
5
6
7
14  
V
CC  
9
Y
R
13 N.C.  
5
Rt  
DI  
RO  
DI  
D
R
10  
RE  
12  
11  
10  
9
A
Z
DE  
B
12  
11  
A
2
Rt  
DI  
Z
RO  
NC  
R
D
D
GND  
GND  
Y
B
1, 8, 13  
8
N.C.  
3
6, 7  
GND  
DIP/SO  
RE  
GND DE  
Figure 1. MAX3080/MAX3083/MAX3086 Pin Configuration and Typical Full-Duplex Operating Circuit  
0.1µF  
V
CC  
TOP VIEW  
MAX3081  
MAX3084  
MAX3087  
V
1
CC  
Y
Z
5
6
3
2
Rt  
DI  
RO  
D
R
1
2
3
4
R
8
7
6
5
A
B
Z
Y
V
CC  
RO  
DI  
8
7
A
B
Rt  
RO  
DI  
R
D
GND  
D
DIP/SO  
4
GND  
GND  
Figure 2. MAX3081/MAX3084/MAX3087 Pin Configuration and Typical Full-Duplex Operating Circuit  
TOP VIEW  
0.1µF  
MAX3082  
MAX3085  
MAX3088  
DE  
D
DI  
R
R
1
2
3
4
RO  
RE  
DE  
DI  
1
2
3
4
RO  
RE  
DE  
DI  
8
7
8
7
6
5
V
V
CC  
CC  
B
B
A
B
Rt  
Rt  
6
A
A
RO  
R
D
D
5
GND  
GND  
RE  
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.  
DIP/SO  
Figure 3. MA82/MAX3085/MAX3088 Pin Configuration and Typical Half-Duplex Operating Circuit  
Maxim Integrated  
13  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
The MAX3082/MAX3085/MAX3088 are half-duplex  
Detailed Description  
transceivers, while the MAX3080/MAX3081/MAX3083/  
The MAX3080–MAX3089 high-speed transceivers for  
MAX3084/MAX3086/MAX3087 are full-duplex trans-  
RS-485/RS-422 communication contain one driver and  
ceivers. The MAX3089 is selectable between half- and  
one receiver. These devices feature fail-safe circuitry,  
full-duplex communication by driving a selector pin  
which guarantees a logic-high receiver output when the  
high or low, respectively.  
receiver inputs are open or shorted, or when they are  
All of these parts operate from a single +5V supply.  
Drivers are output short-circuit current limited. Thermal  
shutdown circuitry protects drivers against excessive  
power dissipation. When activated, the thermal shut-  
down circuitry places the driver outputs into a high-  
impedance state.  
connected to a terminated transmission line with all  
drivers disabled (see Fail-Safe section). The MAX3080/  
MAX3081/MAX3082 feature reduced slew-rate drivers  
that minimize EMI and reduce reflections caused by  
improperly terminated cables, allowing error-free data  
transmission up to 115kbps (see Reduced EMI and  
Reflections section). The MAX3083/MAX3084/MAX3085  
offer higher driver output slew-rate limits, allowing  
transmit speeds up to 500kbps. The MAX3086/  
MAX3087/MAX3088’s driver slew rates are not limited,  
making transmit speeds up to 10Mbps possible. The  
MAX3089’s slew rate is selectable between 115kbps,  
500kbps, and 10Mbps by driving a selector pin with a  
three-state driver.  
Receiver Input Filtering  
The receivers of the MAX3080–MAX3085, and the  
MAX3089 when operating in 115kbps or 500kbps  
mode, incorporate input filtering in addition to input  
hysteresis. This filtering enhances noise immunity with  
differential signals that have very slow rise and fall  
times. Receiver propagation delay increases by 20%  
due to this filtering.  
V
CC  
RE  
MAX3089  
A
RD  
TOP VIEW  
B
H/F  
RO  
1
2
3
4
5
6
7
14  
V
CC  
13 RXP  
RE  
12  
11  
10  
9
A
MAX3089  
DE  
B
H/F  
Z
DI  
Z
TXP  
SRL  
GND  
Y
8
TXP  
DIP/SO  
Y
DI  
NOTE: SWITCH POSITIONS  
INDICATED FOR H/F = GND  
GND DE  
SRL  
Figure 4. MA89 Pin Configuration and Functional Diagram  
14  
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Y
1kΩ  
TEST POINT  
RECEIVER  
OUTPUT  
R
R
V
CC  
S1  
S2  
C
RL  
1kΩ  
V
OD  
15pF  
V
OC  
Z
Figure 5. Driver DC Test Load  
Figure 6. Receiver Enable/Disable Timing Test Load  
TXP and RXP low, connect them to ground, or leave  
them unconnected (internal pulldown). To invert the dri-  
Fail-Safe  
The MAX3080 family guarantees a logic-high receiver  
output when the receiver inputs are shorted or open, or  
when they are connected to a terminated transmission  
line with all drivers disabled. This is done by setting the  
receiver threshold between -50mV and -200mV. If the  
differential receiver input voltage (A-B) is greater than  
or equal to -50mV, RO is logic high. If A-B is less than  
or equal to -200mV, RO is logic low. In the case of a  
terminated bus with all transmitters disabled, the  
receiver’s differential input voltage is pulled to 0V by  
the termination. With the receiver thresholds of the  
MAX3080 family, this results in a logic high with a 50mV  
minimum noise margin. Unlike previous fail-safe  
devices, the -50mV to -200mV threshold complies with  
the 200mV EIA/TIA-485 standard.  
ver phase, drive TXP high or connect it to V . To  
CC  
invert the receiver phase, drive RXP high or connect it  
to V . Note that the receiver threshold is positive  
CC  
when RXP is high.  
The MAX3089 can operate in full- or half-duplex mode.  
Drive the H/F pin low, leave it unconnected (internal  
pulldown), or connect it to GND for full-duplex opera-  
tion, and drive it high for half-duplex operation. In full-  
duplex mode, the pin configuration of the driver and  
receiver is the same as that of a MAX3080 (Figure 4). In  
half-duplex mode, the receiver inputs are switched to  
the driver outputs, connecting outputs Y and Z to inputs  
A and B, respectively. In half-duplex mode, the internal  
full-duplex receiver input resistors are still connected to  
pins 11 and 12.  
MAX3089 Programming  
The MAX3089 has several programmable operating  
modes. Transmitter rise and fall times are programma-  
ble between 2500ns, 750ns, and 25ns, resulting in  
maximum data rates of 115kbps, 500kbps, and  
10Mbps, respectively. To select the desired data rate,  
drive SRL to one of three possible states by using a  
Applications Information  
256 Transceivers on the Bus  
The standard RS-485 receiver input impedance is 12k  
(one-unit load), and the standard driver can drive up to  
32 unit loads. The MAX3080 family of transceivers have  
a 1/8-unit-load receiver input impedance (96k), allow-  
ing up to 256 transceivers to be connected in parallel  
on one communication line. Any combination of these  
devices and/or other RS-485 transceivers with a total of  
32 unit loads or less can be connected to the line.  
three-state driver, by connecting it to V  
or GND, or  
CC  
by leaving it unconnected. For 115kbps operation, set  
the three-state device in high-impedance mode or  
leave SRL unconnected. For 500kbps operation, drive  
SRL high or connect it to V . For 10Mbps operation,  
CC  
drive SRL low or connect it to GND. SRL can be  
changed during operation without interrupting data  
communications.  
Reduced EMI and Reflections  
The MAX3080–MAX3085, and MAX3089 with SRL = V  
CC  
or unconnected, are slew-rate limited, minimizing EMI  
and reducing reflections caused by improperly termi-  
nated cables. Figure 14 shows the driver output wave-  
form and its Fourier analysis of a 20kHz signal  
transmitted by a MAX3086/MAX3087/MAX3088, and  
MAX3089 with SRL = GND. High-frequency harmonic  
Occasionally, twisted-pair lines are connected back-  
ward from normal orientation. The MAX3089 has two  
pins that invert the phase of the driver and the receiver  
to correct for this problem. For normal operation, drive  
Maxim Integrated  
15  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
3V  
DE  
C
L1  
V
CC  
Y
Z
S1  
S2  
500Ω  
R
DIFF  
DI  
OUTPUT  
UNDER TEST  
V
ID  
C
L
C
L2  
Figure 7. Driver Timing Test Circuit  
Figure 8. Driver Enable/Disable Timing Test Load  
3V  
3V  
DE  
DI  
1.5V  
1.5V  
1.5V  
1.5V  
V
0V  
0V  
t
t
PHL  
PLH  
1/2 V  
O
t
t
, t  
LZ  
ZL(SHDN) ZL  
Z
Y, Z  
2.3V  
V
+0.5V  
-0.5V  
O
OUTPUT NORMALLY LOW  
OUTPUT NORMALLY HIGH  
OL  
V
OL  
Y
1/2 V  
O
V
= V (Y) - V (Z)  
DIFF  
Y, Z  
0V  
V
O
V
OH  
2.3V  
V
DIFF  
90%  
90%  
0V  
-V  
10%  
10%  
O
t
, t  
t
HZ  
ZH(SHDN) ZH  
t
R
t
F
t
t
- t  
SKEW = | PLH PHL |  
Figure 9. Driver Propagation Delays  
Figure 10. Driver Enable and Disable Times (except  
MAX3081/MAX3084/MAX3087)  
3V  
RE  
1.5V  
1.5V  
0V  
V
OH  
RO  
1.5V  
1.5V  
V
OL  
OUTPUT  
t
LZ  
t
, t  
ZL(SHDN) ZL  
V
RO  
CC  
t
t
PLH  
PHL  
A
B
1V  
1.5V  
V
V
+ 0.5V  
- 0.5V  
OUTPUT NORMALLY LOW  
OUTPUT NORMALLY HIGH  
OL  
-1V  
INPUT  
RO  
1.5V  
OH  
0V  
t
, t  
t
HZ  
ZH(SHDN) ZH  
Figure 11. Receiver Propagation Delays  
Figure 12. Receiver Enable and Disable Times (except  
MAX3081/MAX3084/MAX3087)  
16  
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
B
RECEIVER  
OUTPUT  
V
ID  
R
20dB/div  
ATE  
A
0Hz  
100kHz/div  
1MHz  
Figure 13. Receiver Propagation Delay Test Circuit  
Figure 14. Driver Output Waveform and FFT Plot of  
MAX3086/MAX3087/MAX3088, and MAX3089 with  
SRL = GND, Transmitting a 20kHz Signal  
A
A
B
B
20dB/div  
20dB/div  
0Hz  
100kHz/div  
1MHz  
0Hz  
100kHz/div  
1MHz  
Figure 15. Driver Output Waveform and FFT Plot of  
MAX3083/MAX3084/MAX3085, and MAX3089  
Figure 16. Driver Output Waveform and FFT Plot of  
MAX3080/MAX3081/MAX3082, and MAX3089  
with SRL = Unconnected, Transmitting a 20kHz Signal  
with SRL = V  
Transmitting a 20kHz Signal  
CC,  
components with large amplitudes are evident. Figure  
15 shows the same signal displayed for a MAX3083/  
MAX3084/MAX3085, and MAX3089 with SRL = VCC),  
transmitting under the same conditions. Figure 15’s  
high-frequency harmonic components are much lower  
in amplitude, compared with Figure 14’s, and the poten-  
tial for EMI is significantly reduced. Figure 16  
shows the same signal displayed for a MAX3080/  
MAX3081/MAX3082, and MAX3089 with SRL = uncon-  
nected, transmitting under the same conditions. Figure  
16’s high-frequency harmonic components are even  
lower.  
In general, a transmitter’s rise time relates directly to the  
length of an unterminated stub, which can be driven with  
only minor waveform reflections. The following equation  
expresses this relationship conservatively:  
Length = t  
/ (10 x 1.5ns/ft)  
RISE  
where t  
is the transmitter’s rise time.  
RISE  
For example, the MAX3080’s rise time is typically  
1320ns, which results in excellent waveforms with a stub  
length up to 90 feet. A system can work well with longer  
unterminated stubs, even with severe reflections, if the  
waveform settles out before the UART samples them.  
Maxim Integrated  
17  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
MAX3080/3089 FIG-18  
MAX3080/MAX3081/MAX3083/  
MAX3084/MAX3086/MAX3087/  
MAX3089 (FULL DUPLEX)  
DI  
5V/div  
A
B
120Ω  
RO  
RE  
R
DATA IN  
V - V  
1V/div  
5V/div  
A
B
DE  
Z
DI  
120Ω  
DATA OUT  
D
Y
RO  
5µs/div  
NOTE: RE AND DE ON MAX3080/MAX3083/MAX3086/MAX3089 ONLY.  
Figure 17. Line Repeater for MAX3080/MAX3081/MAX3083/  
MAX3084/MAX3086/MAX3087, and MAX3089  
in Full-Duplex Mode  
Figure 18. MAX3080/MAX3081/MAX3082, and MAX3089  
with SRL = Unconnected, System Differential Voltage at 50kHz  
Driving 4000 feet of Cable  
Low-Power Shutdown Mode  
(Except MAX3082/MAX3085/MAX3088)  
Low-power shutdown mode is initiated by bringing both  
RE high and DE low. In shutdown, the devices typically  
draw only 1nA of supply current.  
Line Length vs. Data Rate  
The RS-485/RS-422 standard covers line lengths up to  
4000 feet. For line lengths greater than 4000 feet, use  
the repeater application shown in Figure 17.  
Figures 18, 19, and 20 show the system differential volt-  
age for the parts driving 4000 feet of 26AWG twisted-  
pair wire at 110kHz into 120loads.  
RE and DE may be driven simultaneously; the parts are  
guaranteed not to enter shutdown if RE is high and DE  
is low for less than 50ns. If the inputs are in this state  
for at least 600ns, the parts are guaranteed to enter  
shutdown.  
Typical Applications  
The MAX3082/MAX3085/MAX3088/MAX3089 trans-  
ceivers are designed for bidirectional data communica-  
tions on multipoint bus transmission lines. Figures 21  
and 22 show typical network applications circuits.  
These parts can also be used as line repeaters, with  
cable lengths longer than 4000 feet, as shown in Figure 17.  
Enable times t  
and t  
in the Switching Char-  
ZL  
ZH  
acteristics tables assume the part was not in a low-  
power shutdown state. Enable times t and  
ZH(SHDN)  
t
assume the parts were shut down. It takes  
ZL(SHDN)  
drivers and receivers longer to become enabled from  
low-power shutdown mode (t , t ) than  
To minimize reflections, the line should be terminated at  
both ends in its characteristic impedance, and stub  
lengths off the main line should be kept as short as  
possible. The slew-rate-limited MAX3082/MAX3085,  
and the two modes of the MAX3089, are more tolerant  
of imperfect termination.  
ZH(SHDN) ZH(SHDN)  
from driver/receiver-disable mode (t , t ).  
ZH ZL  
Driver Output Protection  
Two mechanisms prevent excessive output current and  
power dissipation caused by faults or by bus con-  
tention. The first, a foldback current limit on the output  
stage, provides immediate protection against short cir-  
cuits over the whole common-mode voltage range (see  
Typical Operating Characteristics). The second, a ther-  
mal shutdown circuit, forces the driver outputs into a  
high-impedance state if the die temperature becomes  
excessive.  
18  
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
MAX3080/3089 FIG-19  
MAX3080/3089 FIG-20  
DI  
5V/div  
DI  
5V/div  
V - V  
1V/div  
5V/div  
V - V  
1V/div  
5V/div  
A
B
A
B
RO  
RO  
2µs/div  
1µs/div  
Figure 19. MAX3083/MAX3084/MAX3085, and MAX3089 with  
SRL = V System Differential Voltage at 50kHz Driving 4000  
feet of Cable  
Figure 20. MAX3086/MAX3087/MAX3088, and MAX3089 with  
SRL = GND, System Differential Voltage at 200kHz Driving  
4000 feet of Cable  
CC,  
120Ω  
120Ω  
DE  
B/Z*  
A/Y*  
B
DI  
D
D
DI  
DE  
B
A
B
A
A
RO  
RE  
RO  
RE  
R
R
R
R
D
D
MAX3082  
MAX3085  
MAX3088  
*MAX3089 (HALF-DUPLEX)  
DE  
DI  
RO  
RE  
DI  
RO RE  
DE  
Figure 21. Typical Half-Duplex RS-485 Network  
Maxim Integrated  
19  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
A
Y
120Ω  
120Ω  
120Ω  
RO  
RE  
R
D
DI  
B
Z
Z
DE  
DE  
B
RE  
RO  
120Ω  
DI  
R
D
Y
A
Y
Z
B
A
Y
Z
B
A
R
R
D
D
MAX3080  
MAX3081  
MAX3083  
MAX3084  
MAX3086  
MAX3087  
DI  
DE RE RO  
DI  
DE RE RO  
NOTE: RE AND DE ON MAX3080/MAX3083/MAX3086/MAX3089 ONLY.  
Figure 22. Typical Full-Duplex RS-485 Network  
MAX3089 (FULL-DUPLEX)  
Ordering Information (continued)  
PART  
TEMP RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
14 SO  
PART  
TEMP RANGE  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
0°C to +70°C  
0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SO  
MAX3086CSD  
MAX3086CPD  
MAX3086ESD  
MAX3086EPD  
MAX3087CSA  
MAX3087CPA  
MAX3087ESA  
MAX3087EPA  
MAX3088CSA  
MAX3088CPA  
MAX3088ESA  
MAX3088EPA  
MAX3089CSD  
MAX3089CPD  
MAX3089ESD  
MAX3089EPD  
MAX3081CSA  
MAX3081CPA  
MAX3081ESA  
MAX3081EPA  
MAX3082CSA  
MAX3082CPA  
MAX3082ESA  
MAX3082EPA  
MAX3083CSD  
MAX3083CPD  
MAX3083ESD  
MAX3083EPD  
MAX3084CSA  
MAX3084CPA  
MAX3084ESA  
MAX3084EPA  
MAX3085CSA  
MAX3085CPA  
MAX3085ESA  
MAX3085EPA  
14 Plastic DIP  
14 SO  
8 Plastic DIP  
8 SO  
14 Plastic DIP  
8 SO  
8 Plastic DIP  
8 SO  
8 Plastic DIP  
8 SO  
8 Plastic DIP  
8 SO  
8 Plastic DIP  
8 SO  
8 Plastic DIP  
14 SO  
8 Plastic DIP  
8 SO  
14 Plastic DIP  
14 SO  
8 Plastic DIP  
14 SO  
14 Plastic DIP  
8 SO  
14 Plastic DIP  
14 SO  
8 Plastic DIP  
8 SO  
14 Plastic DIP  
8 Plastic DIP  
8 SO  
Package Information  
8 Plastic DIP  
8 SO  
For the latest package outline information, go to  
www.maxim-ic.com/packages.  
8 Plastic DIP  
20  
Maxim Integrated  
MAX3080–MAX3089  
Fail-Safe, High-Speed (10Mbps),  
Slew-Rate-Limited RS-485/RS-422 Transceivers  
Maxim cannot me responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.  
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical  
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.  
21  
The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.  
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000  
©
2005 Maxim Integrated  
配单直通车
MAX3087ECSA+产品参数
型号:MAX3087ECSA+
是否无铅: 不含铅
是否Rohs认证: 符合
生命周期:Active
零件包装代码:SOIC
包装说明:SOP, SOP8,.25
针数:8
Reach Compliance Code:compliant
ECCN代码:EAR99
HTS代码:8542.39.00.01
Factory Lead Time:6 weeks
风险等级:0.99
差分输出:YES
驱动器位数:1
输入特性:DIFFERENTIAL SCHMITT TRIGGER
接口集成电路类型:LINE TRANSCEIVER
接口标准:EIA-422; EIA-485
JESD-30 代码:R-PDSO-G8
JESD-609代码:e3
长度:4.9 mm
湿度敏感等级:1
功能数量:1
端子数量:8
最高工作温度:70 °C
最低工作温度:
最小输出摆幅:2 V
最大输出低电流:0.004 A
封装主体材料:PLASTIC/EPOXY
封装代码:SOP
封装等效代码:SOP8,.25
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):260
电源:5 V
认证状态:Not Qualified
最大接收延迟:150 ns
接收器位数:1
座面最大高度:1.75 mm
子类别:Line Driver or Receivers
最大压摆率:1 mA
最大供电电压:5.25 V
最小供电电压:4.75 V
标称供电电压:5 V
表面贴装:YES
温度等级:COMMERCIAL
端子面层:Matte Tin (Sn)
端子形式:GULL WING
端子节距:1.27 mm
端子位置:DUAL
处于峰值回流温度下的最长时间:30
最大传输延迟:60 ns
宽度:3.9 mm
Base Number Matches:1
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