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参数资料
| 型号： | DS12887 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封装： | DIP-24 |
| 文件页数： | 6/19页 |
| 文件大小： | 584K |
| 代理商： | DS12887 |
DS12887
14 of 19
AC ELECTRICAL CHARACTERISTICS
(0
°C to 70°C; V
CC = 4.5V to 5.5V)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Cycle Time
tCYC
385
DC
ns
Pulse Width, DS/E Low or RD/ WR High
PWEL
150
ns
Pulse Width, DS/E High or RD/ WR Low
PWEH
125
ns
Input Rise and Fall Time
tR, tF
30
ns
R/ W Hold Time
tRWH
10
ns
R/ W Setup Time Before DS/E
tRWS
50
ns
Chip Select Setup Time Before DS, WR ,
or RD
tCS
20
ns
Chip Select Hold Time
tCH
0
ns
Read Data Hold Time
tDHR
10
80
ns
Write Data Hold Time
tDHW
0
ns
Muxed Address Valid Time to AS/ALE
Fall
tASL
30
ns
Muxed Address Hold Time
tAHL
10
ns
Delay Time DS/E to AS/ALE Rise
tASD
20
ns
Pulse Width AS/ALE High
PWASH
60
ns
Delay Time, AS/ALE to DS/E Rise
tASED
40
ns
Output Data Delay Time From DS/E or
RD
tDDR
20
120
ns
6
Data Setup Time
tDSW
100
ns
Reset Pulse Width
tRWL
5
s
IRQ
Release from DS
tIRDS
2
s
IRQ
Release from RESET
tIRR
2
s
NOTES:
1. All voltages are referenced to ground.
2. All outputs are open.
3. The MOT pin has an internal pulldown of 20 K
.
4. Applies to the AD0–AD7 pins, the IRQ pin, and the SQW pin when each is in the high impedance
state.
5. The IRQ pin is open drain.
6. Measured with a load as shown in Figure 4.
7. Real time clock modules can be successfully processed through conventional wave–soldering
techniques as long as temperature exposure to the lithium energy source contained within does not
exceed +85
°C. However, post-solder cleaning with water washing techniques is acceptable, provided
that ultrasonic vibration is not used to prevent damage to the crystal.
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PDF描述 |
|---|---|
| DS1302S | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1302N | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
| DS1302SN | 0 TIMER(S), REAL TIME CLOCK, PDSO8 |
| DS1302 | 0 TIMER(S), REAL TIME CLOCK, PDIP8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS12887+ | 功能描述:实时时钟 RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS12887A | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS12887A+ | 功能描述:实时时钟 RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1290 | 功能描述:计数器移位寄存器 RoHS:否 制造商:Texas Instruments 计数器类型: 计数顺序:Serial to Serial/Parallel 电路数量:1 封装 / 箱体:SOIC-20 Wide 逻辑系列: 逻辑类型: 输入线路数量:1 输出类型:Open Drain 传播延迟时间:650 ns 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装:Reel |
| DS12C887 | 功能描述:实时时钟 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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