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  • LT1281ACSW图
  • 北京元坤伟业科技有限公司

     该会员已使用本站17年以上
  • LT1281ACSW 现货库存
  • 数量5000 
  • 厂家LINEAR 
  • 封装SOP16 
  • 批号16+ 
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    QQ:1594462451QQ:1594462451 复制
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  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
  • LT1281ACSW#PBF 现货库存
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  • 厂家ADI 
  • 封装16-Lead SOIC (Wide 0.3 Inch) 
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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
  • LT1281ACSW#PBF
  • 数量5000 
  • 厂家LT 
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    QQ:867789136QQ:867789136 复制
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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
  • LT1281ACSW#PBF
  • 数量9500 
  • 厂家ADI(亚德诺) 
  • 封装16-SOIC(0.295,7.50mm 宽) 
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  • LT1281ACSW图
  • 绿盛电子(香港)有限公司

     该会员已使用本站12年以上
  • LT1281ACSW
  • 数量2015 
  • 厂家Linear 
  • 封装DIP/SMD 
  • 批号19889 
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  • 深圳市恒益昌科技有限公司

     该会员已使用本站6年以上
  • LT1281ACSW
  • 数量4500 
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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
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  • 数量5378 
  • 厂家ADI/LT 
  • 封装16-SOIC(0.295,7.50mm 宽) 
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  • LT1281ACSW图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站15年以上
  • LT1281ACSW
  • 数量36500 
  • 厂家LINEAR/凌特 
  • 封装SOP20 
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  • LT1281ACSW图
  • 深圳市恒达亿科技有限公司

     该会员已使用本站16年以上
  • LT1281ACSW
  • 数量4500 
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  • 封装SOP 
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    QQ:1245773710QQ:1245773710 复制
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  • LT1281ACSW图
  • 首天国际(深圳)科技有限公司

     该会员已使用本站16年以上
  • LT1281ACSW
  • 数量10000 
  • 厂家LINEAR 
  • 封装原厂封装 
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  • LT1281ACSW图
  • 深圳市赛尔通科技有限公司

     该会员已使用本站12年以上
  • LT1281ACSW
  • 数量12850 
  • 厂家LT 
  • 封装SOP20 
  • 批号NEW 
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  • LT1281ACSW图
  • 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
  • LT1281ACSW
  • 数量4675 
  • 厂家LINEAR 
  • 封装SOIC 
  • 批号2023+ 
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  • LT1281ACSW图
  • 深圳市恒达亿科技有限公司

     该会员已使用本站12年以上
  • LT1281ACSW
  • 数量3000 
  • 厂家LT 
  • 封装SOP 
  • 批号25+ 
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  • LT1281ACSW#TR图
  • 深圳市瑞天芯科技有限公司

     该会员已使用本站7年以上
  • LT1281ACSW#TR
  • 数量20000 
  • 厂家LT鼎力支持 
  • 封装SO16 
  • 批号22+ 
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  • LT1281ACSW图
  • 深圳市欧立现代科技有限公司

     该会员已使用本站12年以上
  • LT1281ACSW
  • 数量500 
  • 厂家 
  • 封装SOP 
  • 批号24+ 
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  • LT1281ACSW#PBF图
  • 首天国际(深圳)集团有限公司

     该会员已使用本站17年以上
  • LT1281ACSW#PBF
  • 数量5000 
  • 厂家LINEAR 
  • 封装SOP16 
  • 批号2024+ 
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  • 0755-82807088 QQ:528164397QQ:1318502189
  • LT1281ACSW图
  • 深圳市科雨电子有限公司

     该会员已使用本站9年以上
  • LT1281ACSW
  • 数量9800 
  • 厂家LINEAR(凌特) 
  • 封装SOP-16 
  • 批号24+ 
  • 原厂渠道,全新原装现货,欢迎查询!
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  • LT1281ACSW图
  • 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
  • LT1281ACSW
  • 数量3613 
  • 厂家LINEAR/凌特 
  • 封装NA/ 
  • 批号23+ 
  • 原装现货,当天可交货,原型号开票
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  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
  • LT1281ACSW#PBF
  • 数量
  • 厂家ADI 
  • 封装16-Lead SOIC (Wide 0.3 Inch) 
  • 批号新批次 
  • 新到现货、一手货源、当天发货、bom配单
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  • 深圳市集创讯科技有限公司

     该会员已使用本站5年以上
  • LT1281ACSW#PBF
  • 数量7500 
  • 厂家ADI/亚德诺 
  • 封装SOIC-16 
  • 批号24+ 
  • 原装进口正品现货,假一罚十价格优势
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  • LT1281ACSWTRPBF图
  • 北京首天国际有限公司

     该会员已使用本站16年以上
  • LT1281ACSWTRPBF
  • 数量7250 
  • 厂家LT 
  • 封装SOP16 
  • 批号2024+ 
  • 百分百原装正品,现货库存
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  • 010-62565447 QQ:528164397QQ:1318502189
  • LT1281ACSW/CSW图
  • 北京中其伟业科技有限公司

     该会员已使用本站16年以上
  • LT1281ACSW/CSW
  • 数量550 
  • 厂家LTNEAR 
  • 封装SOP16 
  • 批号16+ 
  • 特价,原装正品,绝对公司现货库存,原装特价!
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  • 010-62104891 QQ:2880824479
  • LT1281ACSW图
  • 长荣电子

     该会员已使用本站14年以上
  • LT1281ACSW
  • 数量
  • 厂家LT 
  • 封装SOP16 
  • 批号00+ 
  • 现货
  • QQ:172370262QQ:172370262 复制
  • 754-4457500 QQ:172370262
  • LT1281ACSW图
  • 北京元坤伟业科技有限公司

     该会员已使用本站17年以上
  • LT1281ACSW
  • 数量5000 
  • 厂家
  • 封装LINEAR 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:857273081QQ:857273081 复制
    QQ:1594462451QQ:1594462451 复制
  • 010-62104891 QQ:857273081QQ:1594462451
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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
  • LT1281ACSW#PBF
  • 数量660000 
  • 厂家Analog Devices Inc 
  • 封装SOIC-16 
  • 批号23+ 
  • 支持实单/只做原装
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  • 0755-21006672 QQ:3008961398
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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
  • LT1281ACSW#PBF
  • 数量13880 
  • 厂家ADI/亚德诺 
  • 封装SOIC-16 
  • 批号21+ 
  • 公司只售原装 支持实单
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  • 深圳市羿芯诚电子有限公司

     该会员已使用本站7年以上
  • LT1281ACSW#TRPBF
  • 数量8500 
  • 厂家原厂品牌 
  • 封装原厂封装 
  • 批号新年份 
  • 羿芯诚只做原装长期供,支持实单
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  • LT1281ACSW/CSW图
  • 深圳市一线半导体有限公司

     该会员已使用本站11年以上
  • LT1281ACSW/CSW
  • 数量15000 
  • 厂家原厂品牌 
  • 封装原厂外观 
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  • 全新原装部分现货其他订货
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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
  • LT1281ACSW#PBF
  • 数量47 
  • 厂家AD 
  • 封装16-Lead SOIC (Wide 0.3 Inch) 
  • 批号24+ 
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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
  • LT1281ACSW#TRPBF
  • 数量6500000 
  • 厂家Analog Devices Inc 
  • 封装原厂原装 
  • 批号22+ 
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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
  • LT1281ACSW#PBF
  • 数量85000 
  • 厂家LT 
  • 封装SOP-16 
  • 批号23+ 
  • 真实库存全新原装正品!代理此型号
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  • LT1281ACSW图
  • 深圳市创思克科技有限公司

     该会员已使用本站2年以上
  • LT1281ACSW
  • 数量8800 
  • 厂家LINEAR/凌特 
  • 封装SOP16 
  • 批号20+ 
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  • 深圳市芯脉实业有限公司

     该会员已使用本站11年以上
  • LT1281ACSW#PBF
  • 数量
  • 厂家ADI 
  • 封装16-Lead SOIC (Wide 0.3 Inch) 
  • 批号新批次 
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  • 深圳市澳亿芯电子

     该会员已使用本站13年以上
  • LT1281ACSW
  • 数量
  • 厂家LINEAR 
  • 封装SOIC16 
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  • 深圳市创芯联科技有限公司

     该会员已使用本站9年以上
  • LT1281ACSW
  • 数量15000 
  • 厂家LINEAR 
  • 封装SOP16 
  • 批号24+ 
  • 原厂货源/正品保证,诚信经营,欢迎询价
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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
  • LT1281ACSW#PBF
  • 数量370 
  • 厂家N/A 
  • 封装N/A 
  • 批号16+ 
  • 正品原装,假一罚十!
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产品型号LT1281ACSW的概述

芯片LT1281ACSW的概述 LT1281ACSW是一款高性能的模拟比较器,由Linear Technology(现为Analog Devices的一部分)设计和制造。该芯片在模拟电路中广泛应用,能够实现高速、低功耗的信号比较功能。LT1281ACSW在速度、功耗、纹波抑制和输入阻抗等方面表现优异,是许多电子应用的理想选择。LT1281ACSW采用先进的工艺技术,使其在高频操作下依然保持高达40V的电源电压范围,充分满足各种需求。 芯片LT1281ACSW的详细参数 LT1281ACSW的主要技术参数如下: 1. 工作电压范围:4V至40V 2. 输入电压范围:-0.3V至V+ 3. 输出电流:最大50mA 4. 开关速度:典型响应时间为25ns(Vout从低到高) 5. 共模范围:-0.3V至V+ - 2.5V 6. 增益带宽积:3MHz 7. 电源电流:当V+为15V时,总体电源...

产品型号LT1281ACSW的Datasheet PDF文件预览

LT1280A/LT1281A  
Low Power 5V RS232  
Dual Driver/Receiver with  
0.1µF Capacitors  
U
DESCRIPTIO  
EATURE  
S
F
The LT®1280A/LT1281A are dual RS232 driver/receiver  
pairs with integral charge pump to generate RS232 volt-  
age levels from a single 5V supply. These circuits feature  
rugged bipolar design to provide operating fault tolerance  
and ESD protection unmatched by competing CMOS  
designs. Using only 0.1µF external capacitors, these cir-  
cuits consume only 40mW of power, and can operate to  
120kbaud even while driving heavy capacitive loads. New  
ESDstructuresonthechipallowtheLT1280A/LT1281Ato  
survive multiple ±10kV strikes, eliminating the need for  
costly TransZorbs® on the RS232 line pins. The LT1280A/  
LT1281A are fully compliant with EIA RS232 standards.  
Driver outputs are protected from overload, and can be  
shorted to ground or up to ±30V without damage. During  
shutdown or power-off conditions, driver and receiver  
outputs are in a high impedance state, allowing line  
sharing.  
10mA Max Supply Current  
ESD Protection over ±10kV  
Uses Small Capacitors: 0.1µF  
120kBaud Operation for RL = 3k, CL = 2500pF  
250kBaud Operation for RL = 3k, CL = 1000pF  
Outputs Withstand ±30V Without Damage  
CMOS Comparable Low Power: 40mW  
Operates from a Single 5V Supply  
Rugged Bipolar Design  
Outputs Assume a High Impedance State When Off  
or Powered Down  
Meets All RS232 Specifications  
Available With or Without Shutdown  
Absolutely No Latch-up  
Available in SO Package  
O U  
PPLICATI  
S
A
The LT1281A is available in 16-pin DIP and SO packages.  
The LT1280A is supplied in 18-pin DIP and SO packages  
for applications which require shutdown.  
Portable Computers  
Battery-Powered Systems  
Power Supply Generator  
Terminals  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
TransZorb is a registered trademark of General Instruments, GSI  
Modems  
U
O
TYPICAL APPLICATI  
2
17  
5V INPUT  
+
+
Output Waveforms  
0.1µF  
0.1µF  
4
3
V
OUT  
+
+
0.1µF  
0.1µF  
LT1280A  
DRIVER  
OUTPUT  
5
7
V
OUT  
+
R
L = 3k  
C
L = 2500pF  
6
12  
15  
RS232 OUTPUT  
RECEIVER  
LOGIC  
INPUTS  
OUTPUT  
R
11  
13  
8
CL = 50pF  
RS232 OUTPUT  
RS232 INPUT  
14  
INPUT  
5k  
5k  
LOGIC  
OUTPUTS  
10  
18  
9
RS232 INPUT  
LT1280A • TA02  
16  
ON/OFF  
LT1280A • TA01  
1
LT1280A/LT1281A  
W W W  
U
(Note 1)  
ABSOLUTE AXI U RATI GS  
Short-Circuit Duration  
Supply Voltage (VCC) ................................................ 6V  
V+ ........................................................................ 13.2V  
V...................................................................... –13.2V  
Input Voltage  
V+ ................................................................... 30 sec  
V................................................................... 30 sec  
Driver Output.............................................. Indefinite  
Receiver Output.......................................... Indefinite  
Operating Temperature Range  
Driver ........................................................... Vto V+  
Receiver ............................................... – 30V to 30V  
ON/OFF ................................................. 0.3V to 12V  
Output Voltage  
LT1280AC/LT1281AC ............................. 0°C to 70°C  
LT1280AI/LT1281AI .......................... – 40°C to 85°C  
Storage Temperature Range ................ – 65°C to 150°C  
Lead Temperature (Soldering, 10 sec)................. 300°C  
Driver ...................................... V+ – 30V to V+ 30V  
Receiver .................................... – 0.3V to VCC + 0.3V  
W
U
/O  
PACKAGE RDER I FOR ATIO  
TOP VIEW  
TOP VIEW  
ORDER PART  
NUMBER  
ORDER PART  
+
1
2
3
4
5
6
7
8
9
ON/OFF  
18  
17  
16  
15  
14  
13  
12  
11  
10  
NC  
+
C1  
V
V
CC  
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
NUMBER  
+
+
V
CC  
C1  
GND  
+
+
GND  
V
C1  
C2  
C2  
V
C1  
C2  
C2  
V
TR1 OUT  
REC1 IN  
REC1 OUT  
TR1 IN  
TR1 OUT  
REC1 IN  
REC1 OUT  
TR1 IN  
LT1280ACN  
LT1280AIN  
LT1280ACSW  
LT1280AISW  
LT1281ACN  
LT1281AIN  
LT1281ACSW  
LT1281AISW  
TR2 OUT  
REC2 IN  
TR2 IN  
TR2 IN  
TR2 OUT  
REC2 IN  
REC2 OUT  
REC2 OUT  
N PACKAGE 16-LEAD PDIP  
SW PACKAGE  
N PACKAGE 18-LEAD PDIP  
SW PACKAGE  
18-LEAD PLASTIC SO WIDE  
16-LEAD PLASTIC SO WIDE  
TJMAX = 125°C, θJA = 90°C/ W, θJC = 46°C/W (N)  
JMAX = 125°C, θJA = 95°C/ W, θJC = 27°C/W (SW)  
TJMAX = 125°C, θJA = 80°C/ W, θJC = 36°C/W (N)  
JMAX = 125°C, θJA = 90°C/ W, θJC = 26°C/W (SW)  
T
T
Consult factory for Military grade parts.  
(Note 2)  
ELECTRICAL CHARACTERISTICS  
PARAMETER  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
Power Supply Generator  
+
V
V
Output  
Output  
7.9  
7.0  
8
V
V
mA  
mA  
Supply Current (V  
)
(Note 3), T = 25°C  
10  
14  
10  
CC  
A
Supply Current When OFF (V  
)
Shutdown (Note 4) LT1280A Only  
1
µA  
CC  
Supply Rise Time  
Shutdown to Turn-On  
C1 = C2 = C3 = C4 = 0.1µF  
LT1280A Only  
0.2  
0.2  
ms  
ms  
ON/OFF Pin Thresholds  
Input Low Level (Device Shutdown)  
Input High Level (Device Enabled)  
0.8  
1.2  
1.6  
V
V
µA  
2.4  
80  
ON/OFF Pin Current  
Oscillator Frequency  
Driver  
0V V  
5V  
15  
ON/OFF  
130  
kHz  
Output Voltage Swing  
Load = 3k to GND  
Input Low Level (V  
Positive  
Negative  
5.0  
2.0  
7.5  
V
V
6.3  
5.0  
0.8  
Logic Input Voltage Level  
= High)  
= Low)  
1.4  
1.4  
V
V
OUT  
OUT  
Input High Level (V  
2
LT1280A/LT1281A  
ELECTRICAL CHARACTERISTICS (Note 2)  
PARAMETER  
CONDITIONS  
0.8V V 2.0V  
MIN  
TYP  
5
MAX  
UNITS  
µA  
Logic Input Current  
Output Short-Circuit Current  
Output Leakage Current  
Data Rate (Note 7)  
20  
IN  
V
= 0V  
±9  
17  
10  
mA  
OUT  
Shutdown V  
= ±30V (Note 4)  
100  
µA  
OUT  
R = 3k, C = 2500pF  
120  
250  
kBaud  
kBaud  
L
L
R = 3k, C = 1000pF  
L
L
Slew Rate  
R = 3k, C = 51pF  
15  
7
30  
V/µs  
V/µs  
L
L
R = 3k, C = 2500pF  
4
L
L
Propagation Delay  
Output Transition t High-to-Low (Note 5)  
0.6  
0.5  
1.3  
1.3  
µs  
µs  
HL  
Output Transition t Low-to-High  
LH  
Receiver  
Input Voltage Thresholds  
Input Low Threshold (V  
= High)  
= Low)  
C Grade  
C Grade  
0.8  
0.2  
1.3  
1.7  
V
V
OUT  
OUT  
Input High Threshold (V  
2.4  
Input Low  
Input High  
I Grade  
I Grade  
1.3  
1.7  
V
V
3.0  
1.0  
7
Hysteresis  
0.1  
3
0.4  
5
V
kΩ  
µA  
Input Resistance  
Output Leakage Current  
Output Voltage  
V
= ±10V  
IN  
Shutdown (Note 4) 0 V  
V  
1
10  
0.4  
OUT  
CC  
Output Low, I  
= 1.6mA  
= 160µA (V = 5V)  
0.2  
4.2  
V
V
OUT  
OUT  
Output High, I  
3.5  
10  
CC  
Output Short-Circuit Current  
Propagation Delay  
Sinking Current, V  
= V  
OUT  
20  
20  
10  
mA  
mA  
OUT  
CC  
= 0V  
Sourcing Current, V  
Output Transition t High-to-Low (Note 6)  
250  
350  
600  
600  
ns  
ns  
HL  
Output Transition t Low-to-High  
LH  
The  
denotes specifications which apply over the operating temperature  
Note 4: Supply current measurements in shutdown are performed with  
V 0.1V.  
ON/OFF  
range (0°C T 70°C for commercial grade, and 40°C T 85°C for  
A
A
industrial grade.  
Note 5: For driver delay measurements, R = 3k and C = 51pF. Trigger  
L
L
Note 1: Absolute Maximum Ratings are those values beyond which the life  
of the device may be impaired.  
points are set between the driver’s input logic threshold and the output  
transition to the zero crossing (t = 1.4V to 0V and t = 1.4V to 0V).  
HL  
LH  
Note 2: Testing done at V = 5V and V  
= 3V, unless otherwise  
Note 6: For receiver delay measurements, C = 51pF. Trigger points are  
CC  
ON/OFF  
L
specified.  
set between the receiver’s input logic threshold and the output transition  
to standard TTL/CMOS logic threshold (t = 1.3V to 2.4V and t = 1.7V  
HL  
LH  
Note 3: Supply current is measured as the average over several charge  
+
to 0.8V).  
pump cycles. C = C = C1 = C2 = 0.1µF. All outputs are open, with all  
driver inputs tied high.  
Note 7: Data rate operation guaranteed by slew rate, short-circuit current  
and propagation delay tests.  
U W  
TYPICAL PERFOR A CE CHARACTERISTICS  
Driver Maximum Output Voltage  
vs Load Capacitance  
Driver Minimum Output Voltage  
vs Load Capacitance  
Driver Output Voltage  
10  
8
8.0  
7.5  
–4.0  
–4.5  
R
= 3k  
L
6
V
V
= 5.5V  
CC  
120k BAUD  
V
= 5V  
CC  
4
7.0  
6.5  
–5.0  
–5.5  
= 4.5V  
CC  
20k BAUD  
60k BAUD  
120k BAUD  
2
OUTPUT HIGH  
60k BAUD  
20k BAUD  
0
OUTPUT LOW  
–2  
–4  
–6  
–8  
–10  
V
V
= 4.5V  
= 5V  
CC  
V
CC  
6.0  
5.5  
5.0  
–6.0  
–6.5  
–7.0  
CC  
= 5.5V  
0
1
2
3
4
5
6
7
8
9
10  
–55  
–25  
0
25  
50  
75 100 125  
0
1
2
3
4
5
6
7
8
9
10  
LOAD CAPACITANCE (nF)  
TEMPERATURE (°C)  
LOAD CAPACITANCE (nF)  
LT1280A • TPC01  
LT1280A • TPC03  
LT1280A • TPC02  
3
LT1280A/LT1281A  
TYPICAL PERFOR A CE CHARACTERISTICS  
U W  
Receiver Input Thresholds  
Supply Current vs Data Rate  
ON/OFF Thresholds  
3.00  
2.75  
2.50  
2.25  
2.00  
1.75  
1.50  
1.25  
1.00  
0.75  
0.50  
50  
40  
30  
20  
3.0  
2.5  
2.0  
1.5  
2 DRIVERS ACTIVE  
R
= 3k  
= 2500pF  
L
L
C
INPUT HIGH  
INPUT LOW  
ON THRESHOLD  
1.0  
0.5  
0
OFF THRESHOLD  
10  
0
–55  
0
25  
50  
75 100 125  
0
50  
75  
100  
125  
150  
–25  
25  
50  
TEMPERATURE (°C)  
100 125  
–55 –25  
0
25  
75  
TEMPERATURE (°C)  
DATA RATE (kBAUD)  
LT1280A • TPC04  
LT1280A • TPC05  
LT1280A • TPC06  
Driver Leakage in Shutdown  
Supply Current  
Driver Short-Circuit Current  
25  
20  
15  
10  
5
30  
25  
20  
15  
100  
10  
1
2 DRIVERS LOADED R = 3k  
+
L
I
SC  
1 DRIVER LOADED R = 3k  
L
I
SC  
V
= 30V  
OUT  
10  
5
V
= –30V  
OUT  
NO LOAD  
0
0
0.1  
–55  
0
25  
50  
75 100 125  
–55 –25  
0
25  
50  
75  
100 125  
–25  
–55  
0
25  
50  
75 100 125  
–25  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
LT1280A • TPC07  
LT1280A • TPC09  
LT1280A • TPC08  
Receiver Short-Circuit Current  
Slew Rate vs Load Capacitance  
50  
40  
30  
20  
10  
0
16  
14  
12  
10  
8
RX I  
+
SC  
RX I  
SC  
+SLEW  
–SLEW  
6
4
2
0
–55  
0
25  
50  
75 100 125  
–25  
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0  
LOAD CAPACITANCE (nF)  
LT1280A • TPC11  
TEMPERATURE (°C)  
LT1280A • TPC10  
4
LT1280A/LT1281A  
U W  
TYPICAL PERFOR A CE CHARACTERISTICS  
Driver Output Waveforms  
Shutdown to Driver Outputs  
10V  
DRIVER 1  
OUTPUT  
5V  
GND  
GND  
DRIVER OUTPUT  
L = 3k  
L = 2500pF  
R
C
DRIVER 2  
OUTPUT  
5V  
DRIVER OUTPUT  
L = 3k  
10V  
R
ON/OFF PIN  
INPUT  
LT1280A • TPC13  
LT1280A • TPC12  
U
U
U
PI FU CTIO S  
VCC: 5V Input Supply Pin. This pin should be decoupled  
with a 0.1µF ceramic capacitor close to the package pin.  
Insufficient supply bypassing can result in low output  
drive levels and erratic charge pump operation.  
Output current capability is sufficient for load conditions  
upto2500pF.Outputsareinahighimpedancestatewhen  
in shutdown mode or VCC = 0V. Outputs are fully short-  
circuit protected from V+ 30V to V+ – 30V. Applying  
highervoltageswillnotdamagethedeviceiftheoverdrive  
is moderately current limited. Short circuits on one  
output can load the power supply generator and may  
disrupt the signal levels of the other outputs. The driver  
outputs are protected against ESD to ±10kV for human  
body model discharges.  
GND: Ground Pin.  
ON/OFF: A TTL/CMOS Compatible Operating Mode Con-  
trol. A logic low puts the LT1280A in shutdown mode.  
Supply current drops to zero and both driver and receiver  
outputs assume a high impedance state. A logic high fully  
enables the device.  
REC1 IN, REC2 IN: Receiver Inputs. These pins accept  
RS232 level signals (±30V) into a protected 5k terminat-  
ing resistor. The receiverinputs are protected againstESD  
to±10kVforhumanbodymodeldischarges.Eachreceiver  
provides 0.4V of hysteresis for noise immunity. Open  
receiver inputs assume a logic low state.  
V+: Positive Supply Output (RS232 Drivers). V+ 2VCC  
1.5V. This pin requires an external charge storage capaci-  
tor C 0.1µF, tied to ground or VCC. Larger value capaci-  
tors may be used to reduce supply ripple. With multiple  
transceivers, the V+ and Vpins may be paralleled into  
common capacitors.  
V: Negative Supply Output (RS232 Drivers). V–  
(2VCC 2.5V).Thispinrequiresanexternalchargestorage  
capacitor C 0.1µF. Larger value capacitors may be used  
to reduce supply ripple. With multiple transceivers, the V+  
and Vpins may be paralleled into common capacitors.  
REC1 OUT, REC2 OUT: Receiver outputs with TTL/CMOS  
Voltage Levels. Outputs are in a high impedance state  
when in shutdown mode to allow data line sharing. Out-  
puts are fully short-circuit protected to ground or VCC with  
the power ON, OFF or in the shutdown mode.  
C1+, C1, C2+, C2: Commutating Capacitor Inputs.  
These pins require two external capacitors C 0.1µF: one  
from C1+ to C1and another from C2+ to C2. C1 should  
be deleted if a separate 12V supply is available and  
connected to pin C1+. Similarly, C2 should be deleted if a  
separate 12V supply is connected to pin V.  
TR1IN, TR2IN:RS232DriverInputPins. Theseinputsare  
TTL/CMOS compatible. Inputs should not be allowed to  
float. Tie unused inputs to VCC.  
TR1 OUT, TR2 OUT: Driver Outputs at RS232 Voltage  
Levels. Driver output swing meets RS232 levels for loads  
up to 3k. Slew rates are controlled for lightly loaded lines.  
5
LT1280A/LT1281A  
U
ESD PROTECTIO  
ESD Test Circuit  
The RS232 line inputs of the LT1280A/LT1281A have on-  
chip protection from ESD transients up to ±10kV. The  
protection structures act to divert the static discharge  
safelytosystemground. InorderfortheESDprotectionto  
function effectively, the power supply and ground pins of  
the circuit must be connected to ground through low  
impedances.Thepowersupplydecouplingcapacitorsand  
charge pump storage capacitors provide this low imped-  
ance in normal application of the circuit. The only con-  
straint is that low ESR capacitors must be used for  
bypassing and charge storage. ESD testing must be done  
with pins VCC, VL, V+, V, and GND shorted to ground or  
connected with low ESR capacitors.  
1
2
3
4
5
6
7
8
9
18  
17  
16  
15  
14  
13  
12  
11  
10  
NC  
ON/OFF  
LT1280A  
+
5V V  
C1  
CC  
0.1µF  
+
+
+
+
0.1µF  
+
0.1µF  
0.1µF  
V
GND  
DR1 OUT  
+
C1  
RS232  
LINE PINS  
PROTECTED  
TO ±10kV  
RX1 IN  
RX1 OUT  
DR1 IN  
C2  
C2  
0.1µF  
+
V
DR2 IN  
DR2 OUT  
RX2 IN  
RS232  
LINE PINS  
PROTECTED  
TO ±10kV  
RX2 OUT  
1280A ESD TC  
U
O
TYPICAL APPLICATI  
Supporting an LT1039 (Triple Driver/Receiver)  
SHUTDOWN  
5V  
18  
17  
8
18  
17  
ON/OFF  
V
CC  
V
CC  
ON/OFF  
LT1039  
LT1280A  
11  
15  
13  
4
6
TTL INPUT  
TTL INPUT  
TTL INPUT  
RS232 OUTPUT  
RS232 OUTPUT  
RS232 OUTPUT  
RS232 OUTPUT  
12  
15  
TTL INPUT  
11  
16  
8
3
RS232 OUTPUT  
RS232 INPUT  
TTL INPUT  
14  
9
13  
RS232 INPUT  
RS232 INPUT  
TTL OUTPUT  
TTL OUTPUT  
30k  
30k  
30k  
5k  
5k  
14  
12  
5
7
RS232 INPUT  
RS232 INPUT  
TTL OUTPUT  
TTL OUTPUT  
10  
TTL OUTPUT  
2
+
C1  
+
1µF  
4
+
C1  
C2  
3
7
1
9
5
+
+
V
V
V
+
1µF  
6
V
C2  
+
GND  
16  
GND  
10  
1µF  
1µF  
+
LT1280A • TA04  
6
LT1280A/LT1281A  
U
Dimensions in inches (millimeters) unless otherwise noted.  
PACKAGE DESCRIPTIO  
N Package  
16-Lead PDIP (Narrow 0.300)  
(LTC DWG # 05-08-1510)  
0.770*  
(19.558)  
MAX  
0.300 – 0.325  
0.130 ± 0.005  
0.045 – 0.065  
(7.620 – 8.255)  
(3.302 ± 0.127)  
(1.143 – 1.651)  
14  
12  
10  
9
15  
13  
11  
16  
0.020  
(0.508)  
MIN  
0.065  
(1.651)  
TYP  
0.009 – 0.015  
(0.229 – 0.381)  
+0.035  
2
1
3
4
6
8
5
7
0.325  
–0.015  
0.125  
(3.175)  
MIN  
0.100 ± 0.010  
(2.540 ± 0.254)  
0.255 ± 0.015*  
(6.477 ± 0.381)  
+0.889  
8.255  
N16 1197  
0.018 ± 0.003  
(0.457 ± 0.076)  
(
)
–0.381  
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.  
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)  
N Package  
18-Lead PDIP (Narrow 0.300)  
(LTC DWG # 05-08-1510)  
0.900*  
(22.860)  
MAX  
0.300 – 0.325  
(7.620 – 8.255)  
0.130 ± 0.005  
(3.302 ± 0.127)  
0.045 – 0.065  
(1.143 – 1.651)  
0.020  
18  
17  
16  
15  
14  
13  
12  
11  
10  
(0.508)  
MIN  
0.065  
(1.651)  
TYP  
0.009 – 0.015  
(0.229 – 0.381)  
+0.035  
1
2
3
5
6
9
4
7
8
0.325  
0.005  
(0.127)  
MIN  
0.100 ± 0.010  
(2.540 ± 0.254)  
–0.015  
0.125  
(3.175)  
MIN  
+0.889  
8.255  
0.255 ± 0.015*  
(6.477 ± 0.381)  
(
)
–0.381  
0.018 ± 0.003  
(0.457 ± 0.076)  
N18 1197  
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.  
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)  
SW Package  
16-Lead Plastic Small Outline (Wide 0.300)  
(LTC DWG # 05-08-1620)  
0.291 – 0.299**  
(7.391 – 7.595)  
0.398 – 0.413*  
(10.109 – 10.490)  
15 14 12  
10  
9
16  
13  
11  
0.010 – 0.029  
(0.254 – 0.737)  
0.037 – 0.045  
0.093 – 0.104  
× 45°  
(0.940 – 1.143)  
(2.362 – 2.642)  
0° – 8°  
TYP  
NOTE 1  
0.050  
(1.270)  
TYP  
0.004 – 0.012  
(0.102 – 0.305)  
0.394 – 0.419  
(10.007 – 10.643)  
0.009 – 0.013  
(0.229 – 0.330)  
NOTE 1  
0.014 – 0.019  
0.016 – 0.050  
(0.406 – 1.270)  
(0.356 – 0.482)  
TYP  
NOTE:  
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.  
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS  
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE  
*
**  
2
3
5
7
8
1
4
6
S16 (WIDE) 0396  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.  
7
LT1280A/LT1281A  
U
Dimensions in inches (millimeters) unless otherwise noted.  
SW Package  
PACKAGE DESCRIPTIO  
18-Lead Plastic Small Outline (Wide 0.300)  
(LTC DWG # 05-08-1620)  
0.291 – 0.299**  
(7.391 – 7.595)  
0.447 – 0.463*  
(11.354 – 11.760)  
14 13  
11  
15  
12  
10  
18 17 16  
0.010 – 0.029  
(0.254 – 0.737)  
0.093 – 0.104  
(2.362 – 2.642)  
0.037 – 0.045  
(0.940 – 1.143)  
× 45°  
0° – 8°  
TYP  
SEE  
NOTE  
0.050  
(1.270)  
TYP  
0.009 – 0.013  
0.004 – 0.012  
(0.102 – 0.305)  
0.394 – 0.419  
(10.007 – 10.643)  
(0.229 – 0.330)  
NOTE 1  
0.016 – 0.050  
(0.406 – 1.270)  
0.014 – 0.019  
(0.356 – 0.482)  
TYP  
NOTE:  
1. PIN 1 IDENT, NOTCH ON TOP AND CAVITIES ON THE BOTTOM OF PACKAGES ARE THE MANUFACTURING OPTIONS.  
THE PART MAY BE SUPPLIED WITH OR WITHOUT ANY OF THE OPTIONS  
2
3
5
7
8
9
1
4
6
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE  
S18 (WIDE) 0396  
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE  
U
O
TYPICAL APPLICATI  
Operation Using 5V and 12V Power Supplies  
2
4
5
6
17  
3
12V INPUT  
5V INPUT  
7
–12V  
OUT  
LT1280A  
+
0.1µF  
0.1µF  
+
12  
15  
RS232 OUTPUT  
LOGIC  
INPUTS  
11  
13  
8
RS232 OUTPUT  
RS232 INPUT  
14  
5k  
5k  
LOGIC  
OUTPUTS  
10  
18  
9
RS232 INPUT  
16  
ON/OFF  
LT1280A • TA03  
RELATED PARTS  
PART NUMBER  
LT1180A/LT1181A  
LT1381  
DESCRIPTION  
COMMENTS  
5V 2-Driver/2-Receiver RS232 Transceivers  
5V 2-Driver/2-Receiver RS232 Transceiver  
5V 2-Driver/2-Receiver RS232 Transceiver  
Pin Compatible with LT1280A/LT1280A  
Narrow 16-Pin SO Package  
LT1780/LT1781  
IEC 1000-4-2 Level 4 Compliance  
12801afa LT/TP 1098 REV A 2K • PRINTED IN USA  
LINEAR TECHNOLOGY CORPORATION 1993  
LinearTechnology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7417  
8
(408)432-1900 FAX:(408)434-0507 www.linear-tech.com  
配单直通车
LT1281ACSW产品参数
型号:LT1281ACSW
Brand Name:Linear Technology
是否Rohs认证: 不符合
生命周期:Transferred
IHS 制造商:LINEAR TECHNOLOGY CORP
零件包装代码:SOIC
包装说明:SOP, SOP16,.4
针数:16
制造商包装代码:SW
Reach Compliance Code:not_compliant
ECCN代码:EAR99
HTS代码:8542.39.00.01
风险等级:5.06
Is Samacsys:N
其他特性:EXTERNAL CHARGE PUMP
差分输出:NO
驱动器位数:2
高电平输入电流最大值:0.00002 A
输入特性:SCHMITT TRIGGER
接口集成电路类型:LINE TRANSCEIVER
接口标准:EIA-232
JESD-30 代码:R-PDSO-G18
JESD-609代码:e0
长度:11.557 mm
湿度敏感等级:1
功能数量:2
端子数量:18
最高工作温度:70 °C
最低工作温度:
最小输出摆幅:10 V
最大输出低电流:0.0016 A
封装主体材料:PLASTIC/EPOXY
封装代码:SOP
封装等效代码:SOP16,.4
封装形状:RECTANGULAR
封装形式:SMALL OUTLINE
峰值回流温度(摄氏度):235
电源:5 V
认证状态:Not Qualified
最大接收延迟:600 ns
接收器位数:2
座面最大高度:2.642 mm
子类别:Line Driver or Receivers
最大压摆率:14 mA
标称供电电压:5 V
表面贴装:YES
技术:BIPOLAR
温度等级:COMMERCIAL
端子面层:Tin/Lead (Sn/Pb)
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:20
最大传输延迟:1300 ns
宽度:7.493 mm
Base Number Matches:1
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