欢迎访问ic37.com |
会员登录 免费注册
发布采购
所在地: 型号: 精确
  • 批量询价
  •  
  • 供应商
  • 型号
  • 数量
  • 厂商
  • 封装
  • 批号
  • 交易说明
  • 询价
更多
  • DS1202S图
  • 集好芯城

     该会员已使用本站13年以上
  • DS1202S
  • 数量15422 
  • 厂家DALLAS 
  • 封装SOP16 
  • 批号最新批次 
  • 原装原厂 现货现卖
  • QQ:3008092965QQ:3008092965 复制
    QQ:3008092965QQ:3008092965 复制
  • 0755-83239307 QQ:3008092965QQ:3008092965
  • DS1202S-8图
  • 北京齐天芯科技有限公司

     该会员已使用本站15年以上
  • DS1202S-8
  • 数量5000 
  • 厂家DALLAS 
  • 封装原厂封装 
  • 批号2024+ 
  • 原装正品,假一罚十
  • QQ:2880824479QQ:2880824479 复制
    QQ:1344056792QQ:1344056792 复制
  • 010-62104931 QQ:2880824479QQ:1344056792
  • DS1202S图
  • 深圳市富科达科技有限公司

     该会员已使用本站13年以上
  • DS1202S
  • 数量7900 
  • 厂家DALLAS 
  • 封装SOP 
  • 批号2020+ 
  • 一级代理 原装现货供应
  • QQ:1327510916QQ:1327510916 复制
    QQ:1220223788QQ:1220223788 复制
  • 0755-28767101 QQ:1327510916QQ:1220223788
  • DS1202S图
  • 深圳市浩兴林电子有限公司

     该会员已使用本站16年以上
  • DS1202S
  • 数量5000 
  • 厂家DALLAS 
  • 封装SMD 
  • 批号2017+ 
  • 优势库存现货,部分无铅
  • QQ:382716594QQ:382716594 复制
    QQ:351622092QQ:351622092 复制
  • 0755-82532799 QQ:382716594QQ:351622092
  • DS1202S图
  • 深圳市励创源科技有限公司

     该会员已使用本站2年以上
  • DS1202S
  • 数量35600 
  • 厂家DALLAS 
  • 封装SOP-16 
  • 批号21+ 
  • 诚信经营,原装现货,假一赔十,欢迎咨询15323859243
  • QQ:815442201QQ:815442201 复制
    QQ:483601579QQ:483601579 复制
  • -0755-82711370 QQ:815442201QQ:483601579
  • DS1202S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
  • DS1202S
  • 数量3748 
  • 厂家NS/国半 
  • 封装NA/ 
  • 批号23+ 
  • 原装现货,当天可交货,原型号开票
  • QQ:3007977934QQ:3007977934 复制
    QQ:3007947087QQ:3007947087 复制
  • 0755-82546830 QQ:3007977934QQ:3007947087
  • DS1202S图
  • 深圳市亿智腾科技有限公司

     该会员已使用本站8年以上
  • DS1202S
  • 数量16680 
  • 厂家DPSI 
  • 封装QFP 
  • 批号16+ 
  • 假一赔十★全新原装现货★★特价供应★工厂客户可放款
  • QQ:799387964QQ:799387964 复制
    QQ:2777237833QQ:2777237833 复制
  • 0755-82566711 QQ:799387964QQ:2777237833
  • DS1202S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
  • DS1202S
  • 数量5000 
  • 厂家DALLAS 
  • 封装SOP16W 
  • 批号16+ 
  • 百分百原装正品,现货库存
  • QQ:857273081QQ:857273081 复制
    QQ:1594462451QQ:1594462451 复制
  • 010-62106431 QQ:857273081QQ:1594462451
  • DS1202S-8图
  • 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
  • DS1202S-8
  • 数量36801 
  • 厂家DALLAS 
  • 封装SOP-8 
  • 批号2023+ 
  • 绝对原装正品全新进口深圳现货
  • QQ:1002316308QQ:1002316308 复制
    QQ:515102657QQ:515102657 复制
  • 深圳分公司0755-83777708“进口原装正品专供” QQ:1002316308QQ:515102657
  • DS1202S图
  • 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
  • DS1202S
  • 数量12500 
  • 厂家DALLAS 
  • 封装SOP16 
  • 批号2023+ 
  • 绝对原装全新正品现货/优势渠道商、原盘原包原盒
  • QQ:364510898QQ:364510898 复制
    QQ:515102657QQ:515102657 复制
  • 0755-83777708“进口原装正品专供” QQ:364510898QQ:515102657
  • DS1202S图
  • 深圳市毅创腾电子科技有限公司

     该会员已使用本站16年以上
  • DS1202S
  • 数量5055 
  • 厂家DALL 
  • 封装NA 
  • 批号22+ 
  • ★只做原装★正品现货★原盒原标★
  • QQ:2355507168QQ:2355507168 复制
    QQ:2355507169QQ:2355507169 复制
  • 86-755-83219286 QQ:2355507168QQ:2355507169
  • DS1202S图
  • 绿盛电子(香港)有限公司

     该会员已使用本站12年以上
  • DS1202S
  • 数量26976 
  • 厂家DALLAS 
  • 封装SOP16 
  • 批号2018+ 
  • ★★代理原装现货,特价热卖!★★
  • QQ:2752732883QQ:2752732883 复制
    QQ:240616963QQ:240616963 复制
  • 0755-25165869 QQ:2752732883QQ:240616963
  • DS1202S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
  • DS1202S
  • 数量65800 
  • 厂家DALLAS 
  • 封装SOP16 
  • 批号24+ 
  • 假一罚十,原装进口正品现货供应,价格优势。
  • QQ:198857245QQ:198857245 复制
  • 0755-82865294 QQ:198857245
  • DS1202S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
  • DS1202S
  • 数量3500 
  • 厂家DALLAS 
  • 封装SO-16-7.2 
  • 批号25+ 
  • 全新原装现货特价销售!
  • QQ:867789136QQ:867789136 复制
    QQ:1245773710QQ:1245773710 复制
  • 0755-82723761 QQ:867789136QQ:1245773710
  • DS1202S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
  • DS1202S
  • 数量12850 
  • 厂家DALLAS 
  • 封装SOP16 
  • 批号NEW 
  • 绝对进口原装现货,市场价格最低!!
  • QQ:1134344845QQ:1134344845 复制
    QQ:847984313QQ:847984313 复制
  • 86-0755-83536093 QQ:1134344845QQ:847984313
  • DS1202S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
  • DS1202S
  • 数量3200 
  • 厂家DALLAS 
  • 封装SOP-16 
  • 批号25+ 
  • 全新原装公司现货销售!
  • QQ:867789136QQ:867789136 复制
    QQ:1245773710QQ:1245773710 复制
  • 0755-82772189 QQ:867789136QQ:1245773710
  • DS1202S-8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
  • DS1202S-8
  • 数量5000 
  • 厂家DALLAS 
  • 封装原厂封装 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:528164397QQ:528164397 复制
    QQ:1318502189QQ:1318502189 复制
  • 0755-82807088 QQ:528164397QQ:1318502189
  • DS1202S图
  • 上海振基实业有限公司

     该会员已使用本站13年以上
  • DS1202S
  • 数量611 
  • 厂家DALLAS 
  • 封装SMD 
  • 批号23+ 
  • 全新原装现货/另有约30万种现货,欢迎来电!
  • QQ:330263063QQ:330263063 复制
    QQ:1985476892QQ:1985476892 复制
  • 021-59159268 QQ:330263063QQ:1985476892
  • DS1202S图
  • 深圳市科雨电子有限公司

     该会员已使用本站9年以上
  • DS1202S
  • 数量9800 
  • 厂家Dallas Logic Corporation 
  • 封装SOP16 
  • 批号24+ 
  • 原厂渠道,全新原装现货,欢迎查询!
  • QQ:97877807QQ:97877807 复制
  • 171-4755-1968(微信同号) QQ:97877807
  • DS1202S-81TR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
  • DS1202S-81TR
  • 数量182 
  • 厂家DALLAS 
  • 封装 
  • 批号16+ 
  • 特价,原装正品,绝对公司现货库存,原装特价!
  • QQ:2880824479QQ:2880824479 复制
  • 010-62104891 QQ:2880824479
  • DS1202S-TRL图
  • 北京首天国际有限公司

     该会员已使用本站16年以上
  • DS1202S-TRL
  • 数量1348 
  • 厂家DALLAS 
  • 封装 
  • 批号2024+ 
  • 百分百原装正品,现货库存
  • QQ:528164397QQ:528164397 复制
    QQ:1318502189QQ:1318502189 复制
  • 010-62565447 QQ:528164397QQ:1318502189
  • DS1202S图
  • 长荣电子

     该会员已使用本站14年以上
  • DS1202S
  • 数量17 
  • 厂家 
  • 封装SOP 
  • 批号16+ 
  • 现货
  • QQ:172370262QQ:172370262 复制
  • 754-4457500 QQ:172370262
  • DS1202S8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
  • DS1202S8
  • 数量25000 
  • 厂家原厂品牌 
  • 封装原厂外观 
  • 批号 
  • 全新原装部分现货其他订货
  • QQ:2881493920QQ:2881493920 复制
    QQ:2881493921QQ:2881493921 复制
  • 0755-88608801多线 QQ:2881493920QQ:2881493921
  • DS1202S图
  • 深圳市芯福林电子有限公司

     该会员已使用本站15年以上
  • DS1202S
  • 数量65000 
  • 厂家DALLAS 
  • 封装SOP-16 
  • 批号23+ 
  • 真实库存全新原装正品!代理此型号
  • QQ:2881495753QQ:2881495753 复制
  • 0755-23605827 QQ:2881495753
  • DS1202S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
  • DS1202S
  • 数量7800 
  • 厂家DALLAS 
  • 封装SOP16 
  • 批号20+ 
  • 全新原装原厂实力挺实单欢迎来撩
  • QQ:1092793871QQ:1092793871 复制
  • -0755-88910020 QQ:1092793871
  • DS1202S图
  • 上海意淼电子科技有限公司

     该会员已使用本站14年以上
  • DS1202S
  • 数量20000 
  • 厂家DALLAS 
  • 封装原厂封装 
  • 批号23+ 
  • 原装现货热卖!请联系吴先生 13681678667
  • QQ:617677003QQ:617677003 复制
  • 15618836863 QQ:617677003
  • DS1202S图
  • 深圳市晨豪科技有限公司

     该会员已使用本站12年以上
  • DS1202S
  • 数量89630 
  • 厂家DALLAS 
  • 封装SOP-16 
  • 批号23+ 
  • 当天发货全新原装现货
  • QQ:1743149803QQ:1743149803 复制
    QQ:1852346906QQ:1852346906 复制
  • 0755-82732291 QQ:1743149803QQ:1852346906
  • DS1202S图
  • 深圳市晶美隆科技有限公司

     该会员已使用本站14年以上
  • DS1202S
  • 数量12736 
  • 厂家DALLAS 
  • 封装SOP-8 
  • 批号23+ 
  • 全新原装正品现货特价
  • QQ:2885348339QQ:2885348339 复制
    QQ:2885348317QQ:2885348317 复制
  • 0755-82519391 QQ:2885348339QQ:2885348317
  • DS1202S+TR图
  • 深圳市惊羽科技有限公司

     该会员已使用本站11年以上
  • DS1202S+TR
  • 数量18800 
  • 厂家MAXIM-美信 
  • 封装SOP-8.贴片 
  • 批号▉▉:2年内 
  • ▉▉¥10一一有问必回一一有长期订货一备货HK仓库
  • QQ:43871025QQ:43871025 复制
  • 131-4700-5145---Q-微-恭-候---有-问-秒-回 QQ:43871025
  • DS1202S图
  • 上海熠富电子科技有限公司

     该会员已使用本站15年以上
  • DS1202S
  • 数量8740 
  • 厂家DALLAS 
  • 封装N/A 
  • 批号2024 
  • 上海原装现货库存,欢迎查询!
  • QQ:2719079875QQ:2719079875 复制
    QQ:2300949663QQ:2300949663 复制
  • 15821228847 QQ:2719079875QQ:2300949663

产品型号DS1202S的概述

DS1202S芯片概述 DS1202S是一种实时时钟(RTC)芯片,广泛应用于各种电子设备中,如计算机、消费电子、工业控制等领域。该芯片的主要功能是在电源关闭的情况下维持准确的时间和日期。DS1202S具有低功耗特性,能够在长时间内保持时钟运行,尤其适用于便携和嵌入式系统。 DS1202S的特点包括内置32.768 kHz晶体振荡器、串行I²C接口和低电压工作范围,使得在电源波动或终止的情况下,仍然可以有效地进行时间和日期的保持。这一特性使得DS1202S在现代电子设备中愈发重要,随着人们对实时性的要求不断提高,这款芯片也逐渐成为了许多电子产品设计中的关键组件。 DS1202S详细参数 DS1202S芯片的详细参数如下: - 电源电压范围:2.0V 至 5.5V - 工作温度范围:-40°C 至 +85°C - 功耗:在静态模式下功耗非常低,约为1µA(典型值) - 时钟精度:±2分钟...

产品型号DS1202S的Datasheet PDF文件预览

DS1202, DS1202S  
DS1202, DS1202S  
Serial Timekeeping Chip  
FEATURES  
PIN ASSIGNMENT  
Real time clock counts seconds, minutes, hours, date  
of the month, month, day of the week, and year with  
leap year compensation valid up to 2100  
NC  
1
2
3
4
8
7
6
5
V
CC  
X1  
X2  
SCLK  
I/O  
24 x 8 RAM for scratchpad data storage  
Serial I/O for minimum pin count  
2.0–5.5 volt full operation  
GND  
RST  
8–PIN DIP  
NC  
X1  
X2  
1
2
3
4
8
7
6
5
V
CC  
SCLK  
I/O  
Uses less than 300 nA at 2 volts  
GND  
RST  
Single–byteor multiple–byte (burst mode) data trans-  
fer for read or write of clock or RAM data  
8–PIN SOIC  
(208 mil)  
8–pin DIP or optional 16–pin SOIC for surface mount  
Simple 3–wire interface  
NC  
NC  
X1  
1
2
3
4
5
6
7
8
16  
V
CC  
15  
14  
13  
12  
11  
10  
9
NC  
SCLK  
NC  
TTL–compatible (V = 5V)  
CC  
NC  
X2  
I/O  
Optionalindustrialtemperaturerange40°Cto+85°C  
(IND)  
NC  
NC  
GND  
NC  
NC  
ORDERING INFORMATION  
RST  
DS1202  
8–pin DIP  
16–PIN SOIC  
DS1202S  
16–pin SOIC  
DS1202S–8 8–pin SOIC  
PIN DESCRIPTION  
DS1202N  
DS1202SN  
DS1202SN–8 8–pin SOIC (IND)  
8–pin DIP (IND)  
16–pin SOIC (IND)  
NC  
No Connection  
32.768 KHz Crystal Input  
Ground  
Reset  
Data Input/Output  
Serial Clock  
X1, X2  
GND  
RST  
I/O  
SCLK  
V
CC  
Power Supply Pin  
DESCRIPTION  
The DS1202 Serial Timekeeping Chip contains a real  
time clock/calendar and 24 bytes of static RAM. It com-  
municates with a microprocessor via a simple serial in-  
terface. The real time clock/calendar provides seconds,  
minutes, hours, day, date, month, and year information.  
The end of the month date is automatically adjusted for  
months with less than 31 days, including corrections for  
leap year. The clock operates in either the 24–hour or  
12–hourformatwithanAM/PMindicator. Interfacingthe  
DS1202 with a microprocessor is simplified by using  
synchronous serial communication. Only three wires  
are required to communicate with the clock/RAM: (1)  
RST (Reset), (2) I/O (Data line), and (3) SCLK (Serial  
clock). Data can be transferred to and from the clock/  
RAM one byte at a time or in a burst of up to 24 bytes.  
The DS1202 is designed to operate on very low power  
and retain data and clock information on less than 1 mi-  
crowatt.  
ECopyright 1997 by Dallas Semiconductor Corporation.  
All Rights Reserved. For important information regarding  
patents and other intellectual property rights, please refer to  
Dallas Semiconductor data books.  
032697 1/11  
DS1202, DS1202S  
The number of clock pulses equals eight plus eight for  
byte mode or eight plus up to 192 for burst mode.  
OPERATION  
The main elements of the Serial Timekeeper are shown  
in Figure 1: shift register, control logic, oscillator, real  
time clock, and RAM. To initiate any transfer of data,  
RST is taken high and eight bits are loaded into the shift  
register providing both address and command informa-  
tion.DataisseriallyinputontherisingedgeoftheSCLK.  
The first eight bits specify which of 32 bytes will be ac-  
cessed, whether a read or write cycle will take place,  
and whether a byte or burst mode transfer is to occur.  
After the first eight clock cycles have occurred which  
loadthe command word into the shift register,additional  
clocks will output data for a read or input data for a write.  
COMMAND BYTE  
The command byte is shown in Figure 2. Each data  
transfer is initiated by a command byte. The MSB (Bit 7)  
must be a logic 1. If it is zero, further action will be termi-  
nated. Bit 6 specifies clock/calendar data if logic 0 or  
RAM data if logic 1. Bits one through five specify the  
designated registers to be input or output, and the LSB  
(Bit 0) specifies a write operation (input) if logic 0 or read  
operation (output) if logic 1. The command byte is al-  
ways input starting with the LSB (bit 0).  
DS1202 BLOCK DIAGRAM Figure 1  
32.768 KHz  
X1  
X2  
I/O  
OSCILLATOR  
AND DIVIDER  
REAL TIME  
CLOCK  
INPUT SHIFT  
REGISTERS  
DATA BUS  
SCLK  
RST  
COMMAND AND  
CONTROL LOGIC  
24 X 8 RAM  
ADDRESS BUS  
ADDRESS/COMMAND BYTE Figure 2  
7
6
5
4
3
2
1
0
RAM  
RD  
1
A4  
A3  
A2  
A1  
A0  
CK  
W
032697 2/11  
DS1202, DS1202S  
Each byte that is written to will be transferred to RAM  
regardless of whether all 24 bytes are written or not.  
RESET AND CLOCK CONTROL  
All data transfers are initiated by driving the RST input  
high. The RST input serves two functions. First, RST  
turnsonthecontrollogicwhichallowsaccesstotheshift  
register for the address/command sequence. Second,  
the RST signal provides a method of terminating either  
singlebyteormultiplebytedatatransfer. A clock cycleis  
a sequence of a falling edge followed by a rising edge.  
For data inputs, data must be valid during the rising  
edge of the clock and data bits are output on t he falling  
edge of clock. All data transfer terminates if the RST in-  
put is low and the I/O pin goes to a high impedance  
state. Data transfer is illustrated in Figure 3.  
CLOCK/CALENDAR  
The clock/calendar is contained in eight write/read reg-  
isters as shown in Figure 4. Data contained in the clock/  
calendar registers is in binary coded decimal format  
(BCD).  
CLOCK HALT FLAG  
Bit 7 of the seconds register is defined as the clock halt  
flag. When this bit is set to logic 1, the clock oscillator is  
stopped and the DS1202 is placed into a low–power  
standby mode with a current drain of not more than 100  
nanoamps. When this bit is written to logic 0, the clock  
will start.  
DATA INPUT  
Following the eight SCLK cycles that input a write com-  
mand byte, a data byte is input on the rising edge of the  
next eight SCLK cycles. Additional SCLK cycles are ig-  
nored should they inadvertently occur. Data is input  
startingwith bit 0. Due to the inherent nature of the logic  
state machine, writing times containing an absolute  
value of “59” seconds should be avoided.  
AM–PM/12–24 MODE  
Bit 7 of the hours register is defined as the 12– or  
24–hourmode select bit. When high, the 12–hour mode  
is selected. In the 12–hour mode, bit 5 is the AM/PM bit  
with logic high being PM. In the 24–hour mode, bit 5 is  
the second 10 hour bit (20–23 hours).  
DATA OUTPUT  
Following the eight SCLK cycles that input a read com-  
mand byte, a data byte is output on the falling edge of  
the next eight SCLK cycles. Note that the first data bit to  
be transmitted occurs on the first falling edge after the  
last bit of the command byte is written. Additional SCLK  
cycles retransmit the data bytes should they inadver-  
tently occur so long as RST remains high. This opera-  
tion permits continuous burst mode read capability.  
Data is output starting with bit 0.  
WRITE PROTECT BIT  
Bit 7 of the control register is the write protect bit. The  
first seven bits (bits 0–6) are forced to zero and will al-  
ways read a zero when read. Before any writeoperation  
to the clock or RAM, bit 7 must be zero. When high, the  
write protect bit prevents a write operation to any other  
register.  
CLOCK/CALENDAR BURST MODE  
BURST MODE  
The clock/calendar command byte specifies burst  
mode operation. In this mode the eight clock/calendar  
registers can be consecutively read or written (see Fig-  
ure 4) starting with bit 0 of address 0.  
Burst mode may be specified for either the clock/calen-  
darortheRAMregistersbyaddressinglocation31deci-  
mal (address/command bits one through five = logical  
one). As before, bit six specified clock or RAM and bit 0  
specifies read or write. There is no data storage capac-  
ity at locations 8 through 31 in the Clock/Calendar Reg-  
isters or locations 24 through 31 in the RAM registers.  
When writing to the clock registers in the burst mode,  
the first eight registers must be written in order for the  
data to be transferred.  
RAM  
The static RAM is 24 x 8 bytes addressed consecutively  
in the RAM address space.  
RAM BURST MODE  
The RAM command byte specifies burst mode opera-  
tion. In this mode, the 24 RAM registers can be consec-  
utively read or written (see Figure 4) starting with bit 0 of  
address 0.  
However, when writing to RAM in burst mode it is not  
necessary to write all 24 bytes for the data to transfer.  
032697 3/11  
DS1202, DS1202S  
pins. There is no need for external capacitors or resis-  
tors. Note: X1 and X2 are very high impedance nodes.  
It is recommended that they and the crystal be guard–  
ringed with ground and that high frequency signals be  
kept away from the crystal area. For more information  
on crystal selection and crystal layout considerations,  
please consult Application Note 58, “Crystal Consider-  
ations with Dallas Real Time Clocks”.  
REGISTER SUMMARY  
A register data format summary is shown in Figure 4.  
CRYSTAL SELECTION  
A 32.768 KHz crystal, can be directly connected to the  
DS1202 via pins 2 and 3 (X1, X2). The crystal selected  
foruseshouldhaveaspecifiedloadcapacitance(CL)of  
6 pF. The crystal is connected directly to the X1 and X2  
DATA TRANSFER SUMMARY Figure 3  
SINGLE BYTE TRANSFER  
SCLK  
RST  
0
1
2
3
4
5
6
7
1
0
1
2
3
4
5
6
7
R/W  
R/C  
I/O  
A0  
A1  
A2  
A3  
A4  
ADDRESS COMMAND  
DATA INPUT/OUTPUT  
BURST MODE TRANSFER  
SCLK  
RST  
0
1
1
2
1
3
1
4
1
5
1
6
7
1
0
1
2
4
5
6
7
R/W  
R/C  
I/O  
ADDRESS COMMAND  
DATA I/O BYTE 1  
DATA I/O BYTE N  
FUNCTION  
BYTE N  
SCLK n  
72  
CLOCK  
RAM  
8
24  
200  
032697 4/11  
DS1202, DS1202S  
REGISTER ADDRESS/DEFINITION Figure 4  
REGISTER ADDRESS  
A. CLOCK  
REGISTER DEFINITION  
7
1
6
0
5
0
4
0
3
0
2
0
1
0
0
RD  
SEC  
MIN  
00–59 CH  
10 SEC  
10 MIN  
SEC  
W
W
W
W
W
W
W
W
W
RD  
RD  
RD  
RD  
RD  
RD  
RD  
RD  
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
1
1
1
1
1
0
1
1
0
0
1
1
1
1
0
1
0
1
0
1
1
00–59  
0
MIN  
HR  
10  
01–12 12/  
00–23 24  
HR  
0
0
0
0
HR  
A/P  
01–28/29  
01–30  
01–31  
DATE  
0
0
0
10 DATE  
DATE  
MONTH  
10  
M
MONTH  
DAY  
01–12  
01–07  
0–99  
0
0
0
0
DAY  
YEAR  
10 YEAR  
YEAR  
CONTROL  
WP  
FORCED TO ZERO  
CLOCK  
BURST  
B. RAM  
RD  
RAM 0  
1
1
0
0
0
0
0
RAM DATA 0  
RAM DATA 23  
W
RD  
RD  
RAM 23  
1
1
1
1
1
1
0
1
1
1
1
1
1
1
W
W
RAM  
BURST  
032697 5/11  
DS1202, DS1202S  
ABSOLUTE MAXIMUM RATINGS*  
Voltage on Any Pin Relative to Ground  
Operating Temperature  
–0.3V to +7.0V  
0°C to 70°C  
Storage Temperature  
Soldering Temperature  
–55°C to +125°C  
260°C for 10 seconds  
* This is a stress rating only and functional operation of the device at these or any other conditions above those  
indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating  
conditions for extended periods of time may affect reliability.  
RECOMMENDED DC OPERATING CONDITIONS  
(0°C to 70°C)  
PARAMETER  
Supply Voltage  
Logic 1 Input  
SYMBOL  
MIN  
2.0  
TYP  
MAX  
UNITS NOTES  
V
5.5  
V
V
1
1
CC  
V
2.0  
V
+0.3  
IH  
CC  
V
=2.0V  
–0.3  
–0.3  
+0.3  
CC  
Logic 0 Input  
V
IL  
V
1
V
=5V  
+0.8  
CC  
DC ELECTRICAL CHARACTERISTICS  
(0°C to 70°C; VCC = 2.0 to 5.5V*)  
PARAMETER  
Input Leakage  
I/O Leakage  
SYMBOL  
MIN  
TYP  
MAX  
+500  
+500  
UNITS NOTES  
I
µA  
µA  
6
6
LI  
I
LO  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
1.6  
2.4  
Logic 1 Output  
V
V
V
2
3
OH  
0.4  
0.4  
0.4  
1.2  
0.3  
1
Logic 0 Output  
V
OL  
Active Supply Current  
Timekeeping Current  
I
mA  
µA  
nA  
5
CC  
I
4
CC1  
CC2  
100  
100  
Leakage Current  
I
10  
*Unless otherwise noted.  
CAPACITANCE  
PARAMETER  
(tA = 25°C)  
SYMBOL CONDITION  
TYP  
5
MAX  
UNITS  
NOTES  
Input Capacitance  
I/O Capacitance  
Crystal Capacitance  
C
pF  
pF  
pF  
I
C
10  
6
I/O  
C
X
032697 6/11  
DS1202, DS1202S  
AC ELECTRICAL CHARACTERISTICS  
(0°C to 70°C; VCC = 2.0 to 5.5V*)  
PARAMETER  
SYMBOL  
MIN  
200  
50  
TYP  
MAX  
UNITS NOTES  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
V
CC  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
=2V  
=5V  
Data to CLK Setup  
t
ns  
ns  
7
7
DC  
280  
70  
CLK to Data Hold  
CLK to Data Delay  
CLK Low Time  
t
t
CDH  
CDD  
800  
200  
ns  
7, 8, 9  
7
1000  
250  
t
ns  
CL  
1000  
250  
CLK High Time  
t
ns  
7, 12  
7, 12  
CH  
0.5  
2.0  
CLK Frequency  
CLK Rise and Fall  
RST to CLK Setup  
CLK to RST Hold  
RST Inactive Time  
f
MHz  
ns  
CLK  
DC  
2000  
500  
t , t  
R
F
4
1
t
µs  
7
7
7
7
CC  
1000  
250  
4
t
ns  
CCH  
t
µs  
CWH  
1
280  
70  
RST to I/O High Z  
t
ns  
CDZ  
*Unless otherwise noted.  
032697 7/11  
DS1202, DS1202S  
TIMING DIAGRAM: READ DATA TRANSFER Figure 5  
RESET  
t
CC  
CLOCK  
t
t
CDD  
CDH  
t
t
CDZ  
DC  
DATA INPUT/  
OUTPUT  
0
1
7
COMMAND BYTE  
TIMING DIAGRAM: WRITE DATA TRANSFER Figure 6  
t
CWH  
RESET  
t
CC  
t
CCH  
t
R
t
CL  
t
F
CLOCK  
t
CDH  
t
CH  
t
DC  
DATA INPUT/  
OUTPUT  
0
1
7
COMMAND BYTE  
NOTES:  
1. All voltages are referenced to ground.  
2. Logic one voltages are specified at a source current of 1 mA at V =5V and 0.4 mA at V =2V, V =V for  
CC  
CC  
OH  
CC  
capacitive loads.  
3. Logic zero voltages are specified at a sink current of 4 mA at V =5V and 1.5 mA at V =2V.  
CC  
CC  
4. I  
is specified with I/O open, RST set to a logic 0, and clock halt flag=0 (oscillator enabled).  
CC1  
5. I is specified with the I/O pin open, RST high, SCLK=2 MHz at V =5V; SCLK=500 KHz, V =2V and clock  
CC  
CC  
CC  
halt flag=0 (oscillator enabled).  
6. RST, SCLK, and I/O all have 40Kpull–down resistors to ground.  
7. Measured at V =2.0V or V =0.8V and 10 ms maximum rise and fall time.  
IH  
IL  
8. Measured at V =2.4V or V =0.4V.  
OH  
OL  
9. Load capacitance = 50 pF.  
032697 8/11  
DS1202, DS1202S  
10.I  
is specified with RST, I/O, and SCLK open. The clock halt flag must be set to logic one (oscillator disabled).  
CC2  
11. At power–up, RST must be at a logic 0 until V y2 volts. Also, SCLK must be at a logic 0 when RST is driven  
CC  
to a logic one state.  
12.If t exceeds 100 ms with RST in a logic one state, then I may briefly exceed I specification.  
CH  
CC  
CC  
DS1202 SERIAL TIMEKEEPER 8–PIN DIP  
8
5
PKG  
DIM  
8–PIN  
MIN  
MAX  
B
A IN.  
MM  
0.360  
0.240  
0.120  
0.300  
0.015  
0.110  
0.090  
0.320  
0.008  
0.015  
0.400  
B IN.  
MM  
0.260  
0.140  
0.325  
0.040  
0.140  
0.110  
0.370  
0.012  
0.021  
C IN.  
MM  
1
4
A
D IN.  
MM  
E IN.  
MM  
C
F
F IN.  
MM  
G IN.  
MM  
K
E
G
H IN.  
MM  
J IN.  
MM  
K IN.  
MM  
D
J
H
032697 9/11  
DS1202, DS1202S  
DS1202S SERIAL TIMEKEEPER 16–PIN SOIC  
K
G
F
phi  
B
H
L
J
PKG  
16–PIN  
MIN  
DIM  
MAX  
1
A IN.  
MM  
0.500  
12.70  
0.511  
12.99  
A
B IN.  
MM  
0.290  
7.37  
0.300  
7.65  
C
C IN.  
MM  
0.089  
2.26  
0.095  
2.41  
E
E IN.  
MM  
0.004  
0.102  
0.012  
0.30  
F IN.  
MM  
0.094  
2.38  
0.105  
2.68  
G IN.  
MM  
0.050 BSC  
1.27 BSC  
H IN.  
MM  
0.398  
10.11  
0.416  
10.57  
J IN.  
MM  
0.009  
0.229  
0.013  
0.33  
K IN.  
MM  
0.013  
0.33  
0.019  
0.48  
L IN  
MM  
0.016  
0.406  
0.040  
1.20  
phi  
0°  
8°  
032697 10/11  
DS1202, DS1202S  
DS1202S8 8–PIN SOIC 200 MIL  
K
G
J
F
H
B
0–8 deg. typ.  
L
1
PKG  
DIM  
8–PIN  
MIN  
MAX  
C
A IN.  
MM  
0.203  
5.16  
0.213  
5.41  
A
B IN.  
MM  
0.203  
5.16  
0.213  
5.41  
E
C IN.  
MM  
0.070  
1.78  
0.074  
1.88  
E IN.  
MM  
0.004  
0.102  
0.010  
0.390  
F IN.  
MM  
0.074  
1.88  
0.84  
2.13  
G IN.  
MM  
0.050 BSC  
1.27 BSC  
H IN.  
MM  
0.302  
7.67  
0.318  
8.07  
J IN.  
MM  
0.006  
0.152  
0.010  
0.254  
K IN.  
MM  
0.013  
0.33  
0.020  
0.508  
L IN.  
MM  
0.19  
4.83  
0.030  
0.762  
032697 11/11  
配单直通车
  •  
  • 供货商
  • 型号 *
  • 数量*
  • 厂商
  • 封装
  • 批号
  • 交易说明
  • 询价
批量询价选中的记录已选中0条,每次最多15条。
 复制成功!