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參數(shù)資料
| 型號： | DS1744P-70 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| 封裝： | EDIP MODULE-28 |
| 文件頁數(shù)： | 7/22頁 |
| 文件大?。?/td> | 920K |
| 代理商： | DS1744P-70 |
DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs
15 of 20
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 VPF.
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 VCC.
The expected tDR is defined for DIP modules and assembled PowerCap modules as a cumulative time
in the absence of VCC 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) tAH1, tDH1 are measured from WE going high.
9) tAH2, tDH2 are measured from CE going high.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1744W-120 | 0 TIMER(S), REAL TIME CLOCK, DMA28 |
| DS1744P | REAL TIME CLOCK, DMA34 |
| DS1744 | REAL TIME CLOCK, DMA28 |
| DS1746-70 | 0 TIMER(S), REAL TIME CLOCK, DIP32 |
| DS1746WP-120 | 0 TIMER(S), REAL TIME CLOCK, DMA34 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1744P-70+ | 功能描述:實時時鐘 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 |
| DS1744P-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 |
| DS1744P-70IND+ | 功能描述:實時時鐘 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 |
| DS1744W120 | 制造商:Maxim Integrated Products 功能描述: |
| DS1744W-120 | 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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