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參數(shù)資料
| 型號： | M41T93RQA6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PQCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數(shù)： | 7/49頁 |
| 文件大?。?/td> | 719K |
| 代理商： | M41T93RQA6F |
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M41T93
Operation
Doc ID 12615 Rev 5
2.3
Data retention and battery switchover (VSO = VRST)
Once VCC falls below the switchover voltage (VSO = VRST), the device automatically
switches over to the battery and powers down into an ultra low current mode of operation to
preserve battery life. If VBAT is less than, or greater than VRST, the device power is switched
clock registers and user RAM will be maintained by the attached battery supply.
When it is powered back up, the device switches back from battery to VCC at VSO +
hysteresis. When VCC rises above VRST, it will recognize the inputs. For more information
on battery storage life refer to application note AN1012.
2.4
Power-on reset (trec)
The M41T93 continuously monitors VCC. When VCC falls to the power fail detect trip point,
the RST output pulls low (open drain) and remains low after power-up for trec (210ms
typical) after VCC rises above VRST (max).
Note:
The trec period does not affect the RTC operation. Write protect only occurs when VCC is
below VRST. When VCC rises above VRST, the RTC will be selectable immediately. Only the
RST output is affected by the trec period.
The RST pin is an open drain output and an appropriate pull-up resistor to VCC should be
chosen to control the rise time.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M41T93SQA6F | 1 TIMER(S), REAL TIME CLOCK, PQCC16 |
| M43C505-XXX-DIT | 4-BIT, MROM, 2 MHz, MICROCONTROLLER, UUC |
| M43C505-XXX-Q44 | 4-BIT, MROM, 2 MHz, MICROCONTROLLER, PQCC44 |
| M44C090-XXX-FL16 | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PDSO16 |
| M44C090-XXX-DIT | 4-BIT, MROM, 4 MHz, MICROCONTROLLER, UUC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41T93RQA6F-CUT TAPE | 制造商:ST 功能描述:M41T93 Series 5.5 V Serial SPI Bus RTC With Battery Switchover -QFN-16 |
| M41T93SMY6E | 功能描述:實時時鐘 Serial SPI bus RTC 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 |
| M41T93SMY6F | 功能描述:實時時鐘 Serial SPI bus RTC 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 |
| M41T93SQA6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial SPI bus RTC with battery switchover |
| M41T93SQA6F | 功能描述:實時時鐘 Serial SPI bus RTC 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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