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參數(shù)資料
| 型號： | DS1554WP-150 |
| 英文描述： | 256K NV Y2KC Timekeeping RAM |
| 中文描述： | 256K內(nèi)存時鐘非易失Y2KC |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 284K |
| 代理商： | DS1554WP-150 |
DS1554
17 of 21
AC TEST CONDITIONS
Output Load:
Input Pulse Levels:
Timing Measurement Reference Levels:
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns
100 pF + 1TTL Gate
0.0 to 3.0 Volts
NOTES:
1.
Voltage referenced to ground.
2.
Typical values are at 25
°
C and nominal supplies.
3.
Outputs are open.
4.
Battery switch over occurs at the lower of either the battery voltage or V
PF
.
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 V
CC
is first applied by the
user. The expected t
DR
is defined for DIP modules and PowerCap modules as a cumulative time in
the absence of V
CC
starting from the time power is first applied by the user.
8.
Real Time Clock 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 (“l(fā)ive-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.
t
AH1
, t
DH1
are measured from WE going high.
10.
t
AH1
, t
DH1
are measured from CE going high.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1554WP-120 | 256K NV Y2KC Timekeeping RAM |
| DS1554W-150 | 256K NV Y2KC Timekeeping RAM |
| DS1669-010 | Dallastat Electronic Digital Rheostat |
| DS1669-050 | Dallastat Electronic Digital Rheostat |
| DS1669-10 | Dallastat Electronic Digital Rheostat |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1556 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
| DS1556_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1M, Nonvolatile, Y2K-Compliant Timekeeping RAM |
| DS1556-70 | 功能描述:實時時鐘 1M NV RAM Timekeeper RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1556-70+ | 功能描述:實時時鐘 1M NV RAM Timekeeper RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1556-70IND | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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