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参数资料
| 型号： | M48T212V-85MH1E |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | REAL TIME CLOCK, PDSO44 |
| 封装： | 0.330 INCH, ROHS COMPLIANT, PLASTIC, SOH-44 |
| 文件页数： | 7/35页 |
| 文件大小： | 348K |
| 代理商： | M48T212V-85MH1E |
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M48T212V
Operation
making the final choice of an SRAM to use. The SRAM must be designed in a way where
the chip enable input disables all other inputs to the SRAM. This allows inputs to the
M48T212V and SRAMs to be “Don't care” once VCC falls below VPFD(min). The SRAM
should also guarantee data retention down to VCC = 2.0V. The chip enable access time must
be sufficient to meet the system needs with the chip enable output propagation delays
included.
If the SRAM includes a second chip enable pin (E2), this pin should be tied to VOUT.
If data retention lifetime is a critical parameter for the system, it is important to review the
data retention current specifications for the particular SRAMs being evaluated. Most SRAMs
specify a data retention current at 3.0V. Manufacturers generally specify a typical condition
for room temperature along with a worst case condition (generally at elevated
temperatures). The system level requirements will determine the choice of which value to
use.
The data retention current value of the SRAMs can then be added to the IBAT value of the
M48T212V to determine the total current requirements for data retention. The available
battery capacity for the SNAPHAT of your choice can then be divided by this current to
determine the amount of data retention available (see Table 20 on page 33).
For a further more detailed review of lifetime calculations, please see Application Note
AN1012.
相关PDF资料 |
PDF描述 |
|---|---|
| M48T35V-10PC1 | 1 TIMER(S), REAL TIME CLOCK, PDIP28 |
| M48T35V-10MH1 | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T35V-10MH1TR | 1 TIMER(S), REAL TIME CLOCK, PDSO28 |
| M48T512V-85PM1 | 0 TIMER(S), REAL TIME CLOCK, PDIP32 |
| M48T512V-70PM1 | REAL TIME CLOCK, PDIP32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T212V-85MH1F | 功能描述:监控电路 SRAM TK 16X8 85ns RoHS:否 制造商:STMicroelectronics 监测电压数: 监测电压: 欠电压阈值: 过电压阈值: 输出类型:Active Low, Open Drain 人工复位:Resettable 监视器:No Watchdog 电池备用开关:No Backup 上电复位延迟（典型值）:10 s 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UDFN-6 封装:Reel |
| M48T212V-85MH1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER[ CONTROLLER |
| M48T212V-85MH6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
| M48T212V-85MH6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V/3.3V TIMEKEEPER CONTROLLER Supervisor |
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