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參數(shù)資料
| 型號(hào)： | DS1746 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類(lèi)： | Timer or RTC |
| 英文描述： | REAL TIME CLOCK, DMA32 |
| 封裝： | PLASTIC, MODULE, DIP-32 |
| 文件頁(yè)數(shù)： | 6/18頁(yè) |
| 文件大?。?/td> | 224K |
| 代理商： | DS1746 |
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DS1746/DS1746P
14 of 18
AC TEST CONDITIONS
Output Load:
100 pF + 1TTL Gate
Input Pulse Levels:
0.0 to 3.0V
Timing Measurement Reference Levels:
Input: 1.5V
Output: 1.5V
Input Pulse Rise and Fall Times: 5 ns
NOTES:
1. Voltages are 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 terminal voltage or VPF.
5. Data retention time is at 25
°C.
6. Each DS1746 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 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. Real–Time Clock Modules (DIP) can be successfully processed through conventional wave–soldering
techniques as long as temperatures 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 ultra-sonic 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 (three) 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 |
|---|---|
| DS1746P | REAL TIME CLOCK, DMA34 |
| DS1747-70 | 0 TIMER(S), REAL TIME CLOCK, DMA32 |
| DS1747W-120 | REAL TIME CLOCK, PDMA32 |
| DS1747P-70 | REAL TIME CLOCK, DMA34 |
| DS1747WP-120 | REAL TIME CLOCK, DMA34 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1746_10 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1746_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Y2K-Compliant, Nonvolatile Timekeeping RAMs |
| DS1746-70 | 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 |
| DS1746-70+ | 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 |
| DS1746-70IND | 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 |
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