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参数资料
| 型号： | DS1239S-10+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/4页 |
| 文件大小： | 0K |
| 描述： | IC MICROMANAGER 10% 16-SOIC |
| 标准包装： | 45 |
| 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： | 低有效 |
| 复位超时： | 最小为 25 ms |
| 电压 - 阀值： | 4.37V |
| 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： | 管件 |
DS1239
DS1239 is identical to the DS1236 with two exceptions. The RC and RST pins have been replaced with
PSI and PSO, respectively. Other pins and functions operate exactly as the DS1236 in NMOS mode.
POWER SUPPLY CONTROL
The DS1239 facilitates the power-up and power-down sequencing of a main power supply from a
keyboard or pushbutton. The Power Supply Control Input ( PSI ) and Power Supply Control Output (PSO)
are used for this purpose. Prior to establishing a voltage on V CC (+5V), the PSI is internally held at a high
level at all times with the V BAT supply. When PSI is forced low via a keypad or other source, the PSO is
connected to the V BAT to provide a high level. As shown in Figure 1, this active high signal can be wired
directly to an optically isolated SCR to initiate an AC to DC power-up sequence. This in turn will provide
the supply voltage for V CC . The timing is illustrated in Figure 2. Holding the PSI input low, the PSO
output will supply a connection to the V BAT pin until the V CC reaches V BAT , or a maximum of 500 ms. If
the supply voltage on V CC rises above the V BAT level before the t PSI timeout, the PSO pin will remain high
and track the V CC input. If V CC does not rise above V BAT before either t PSI or PSI is allowed to return to a
high level, the PSO output will return to tristate. Once the PSO output and V CC are set at a high level, a
subsequent falling edge on PSI will tristate PSO to initiate a shut down condition. The 10 microamp
current supplied by the PSI pin allows the use of a 0.1 μ F capacitor as a simple pushbutton debounce
circuit. The battery size for this application must be selected to provide the SCR on-current for the power
supply response time and is consequently application-specific.
POWER SUPPLY CONTROL Figure 1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1239S-10+ | 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 |
| DS1239S10N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| DS1239S-5 | 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 |
| DS1239S-5+ | 功能描述:监控电路 MicroManager Chip 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 |
| DS1239S-5+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 |
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