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参数资料
| 型号： | DS1238AS-5+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/13页 |
| 文件大小： | 0K |
| 描述： | IC MICROMANAGER 5% 16-SOIC |
| 标准包装： | 1,000 |
| 系列： | MicroManager |
| 类型： | 备用电池电路 |
| 监视电压数目： | 1 |
| 输出： | 开路漏极或开路集电极 |
| 复位： | 高有效/低有效 |
| 复位超时： | 最小为 40 ms |
| 电压 - 阀值： | 4.62V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 带卷 (TR) |
DS1238A
POWER SWITCHING Figure 8
Note: If freshness on the DS1238A is not used,
PF
on the DS1336 may be tied to OUT1. This will free IN4, OUT4,
and V BAT01 for system use.
TIMING DIAGRAMS
This section provides a description of the timing diagrams shown in Figure 9 and Figure 10. Figure 9
illustrates the relationship for power down. As V CC falls, the IN pin voltage drops below V TP . As a result,
the processor is notified of an impending power failure via an active NMI . This gives the processor time
to save critical data in nonvolatile SRAM. As the power falls further, V CC crosses V CCTP , the power
monitor trip point. When V CC reaches V CCTP , and active RST and RST are given. At this time, CEO is
brought high to write-protect the RAM. When the V CC reaches V BAT , a power-fail is issued via the PF
pin.
Figure 10 shows the power-up sequence. As V CC slews above V BAT , the PF pin is deactivated. An active
reset occurs as well as an NMI . Although the NMI may be short due to slew rates, reset will be
maintained for the standard t RPU timeout period . At a later time, if the IN pin falls below V TP , a new NMI
will occur. If the processor does not issue an ST , a watchdog reset will also occur. The second NMI and
RST are provided to illustrate these possibilities.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1238N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Supply Supervisor |
| DS1238S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power Supply Supervisor |
| DS1238S/T&R | 功能描述:监控电路 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 |
| DS1238S/T&R/ | 功能描述:监控电路 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 |
| DS1238S+T&R | 制造商:Maxim Integrated Products 功能描述:IC MICROMAN W/FRESH 10% 16-SOIC |
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