参数资料
型号: DS1554P-70
厂商: MAXIM INTEGRATED PRODUCTS INC
元件分类: Timer or RTC
英文描述: 0 TIMER(S), REAL TIME CLOCK, DMA34
封装: POWERCAP MODULE-34
文件页数: 9/21页
文件大小: 371K
代理商: DS1554P-70
DS1554 256k, Nonvolatile, Y2K-Compliant Timekeeping RAM
17 of 21
AC TEST CONDITIONS
Output Load: 50 pF + 1TTL Gate
Input Pulse Levels: 0 to 3.0V
Timing Measurement Reference Levels:
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns
NOTES:
1) Voltage referenced to ground.
2) Typical values are at +25
°C and nominal supplies.
3) Outputs are open.
4) Battery switchover occurs at the lower of either the battery voltage or VPF.
5) The IRQ /FT and
RST outputs are open drain.
6) Data-retention time is at +25
°C.
7) Each DS1554 has a built-in switch that disconnects the lithium source until VCC is first applied by the
user. The expected tDR is defined for DIP modules and PowerCap modules as a cumulative time in the
absence of VCC starting from the time power is first applied by the user.
8) RTC modules (DIP) 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. Post-solder cleaning with water-washing techniques is acceptable, provided that ultrasonic
vibration is not used.
In addition, for the PowerCap:
a. Dallas Semiconductor recommends that PowerCap Module bases experience one pass through
solder reflow oriented with the label side up (“live-bug”).
b. Hand soldering and touch-up: Do not touch or apply the soldering iron to leads for more than
3 seconds. To solder, apply flux to the pad, heat the lead frame pad and apply solder. To remove
the part, apply flux, heat the lead frame pad until the solder reflow and use a solder wick to
remove solder.
9) tAH1, tDH1 are measured from WE going high.
10) tAH2, tDH2 are measured from CE going high.
相关PDF资料
PDF描述
DS1554 REAL TIME CLOCK, DMA32
DS1556-70 REAL TIME CLOCK, PDMA32
DS1556W-120 REAL TIME CLOCK, DMA32
DS1556 REAL TIME CLOCK, DMA32
DS1556P REAL TIME CLOCK, DMA34
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DS1554P-70IND 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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DS1554W 制造商:未知厂家 制造商全称:未知厂家 功能描述:Real-Time Clock
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