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參數(shù)資料
| 型號(hào)： | DS1744P-70 |
| 英文描述： | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| 中文描述： | 千年蟲的，非易失時(shí)鐘存儲(chǔ)器 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 348K |
| 代理商： | DS1744P-70 |
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
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AC TEST CONDITIONS
Output Load: 50pF + 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: 5ns
NOTES:
1) Voltages are 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 terminal voltage or V
PF
.
5) Data-retention time is at +25 C.
6) Each DS1744 has a built-in switch that disconnects the lithium source until the user first applies V
CC
.
The expected t
DR
is defined for DIP modules and assembled PowerCap modules as a cumulative time
in the absence of V
CC
starting from the time power is first applied by the user.
7) 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 (“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 reflows, and use a solder
wick to remove solder.
8) t
AH1
, t
DH1
are measured from
WE
going high.
9) t
AH2
, t
DH2
are measured from
CE
going high.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1744P-70IND | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744W-120 | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744W-120IND | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744WP-120 | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1744WP-120IND | Y2K-Compliant, Nonvolatile Timekeeping RAMs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1744P-70+ | 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1744P-70IND | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1744P-70IND+ | 功能描述:實(shí)時(shí)時(shí)鐘 Timekeeping NV RAM 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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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 |
| DS1744W120 | 制造商:Maxim Integrated Products 功能描述: |
| DS1744W-120 | 功能描述:實(shí)時(shí)時(shí)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(shí)間格式:HH:MM:SS RTC 存儲(chǔ)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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