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参数资料
| 型号： | DS1238S-5/T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/14页 |
| 文件大小： | 0K |
| 描述： | IC MICROMAN W/FRESH 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，推挽式 |
| 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) |
DS1238
DS1238 FUNCTIONAL BLOCK DIAGRAM Figure 1
WATCHDOG TIMER
The DS1238 provides a watchdog timer function which forces the WDS , RST, and RST signals to the
active state when the strobe input ( ST ) is not stimulated for a predetermined time period. This time period
is described below in Table 1. The watchdog timeout period begins as soon as RST and RST are inactive.
If a high-to-low transition occurs at the ST input prior to timeout, the watchdog timer is reset and begins
to time out again. The ST input timing is shown in Figure 2. In order to guarantee that the watchdog timer
does not time out, a high-to-low transition on ST must occur at or less than the minimum timeout of the
watchdog as described in the AC Electrical Characteristics. If the watchdog timer is allowed to time out,
the WDS , RST, and RST outputs are driven to the active state. WDS is a latched signal which indicates
the watchdog status, and is activated as soon as the watchdog timer completes a full period as outlined in
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| DS-1238ZJ | 制造商:HIKVISION 功能描述:BRACKET PENDANT FOR 51XX/7XX DOME CAMERAS |
| DS1239 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:MicroManager Chip |
| DS1239-10 | 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 |
| DS1239-10+ | 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 |
| DS1239-10N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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