STMicroelectronics STWD100 Watchdog Timer Circuits
STMicroelectronics STWD100 Watchdog Timer Circuits are self-contained devices which prevent system failures that are caused by certain types of hardware errors (non-responding peripherals, bus contention, etc.) or software errors (bad code jump, code stuck in loop, etc.). The STWD100 watchdog timer has an input, WDI, and an output, WDO. The input is used to clear the internal watchdog timer periodically within the specified timeout period, twd. While the system is operating correctly, it periodically toggles the watchdog input, WDI. If the system fails, the watchdog timer is not reset, a system alert is generated and the watchdog output, WDO, is asserted.
Features
- Current consumption 13μA typ.
- Available watchdog timeout periods are 3.4ms, 6.3ms, 102ms and 1.6s
- Chip enable input
- Open drain or push-pull WDO output
- Operating temperature range: -40 to +125°C
- Packages: SOT-23-5, SC70-5 (SOT-323-5)
- ESD performance
- HBM: 2000V
- RCDM: 1000V
Applications
- Telecommunications
- Alarm systems
- Industrial equipment
- Networking
- Medical equipment
- UPS (uninterruptible power supply)
Logic Diagram
Block Diagram
发布日期: 2012-12-07
| 更新日期: 2022-03-11