STWD100YNYWY3F

STWD100YNYWY3F is a watchdog timer circuit. This is a self contained device which prevents system failures that are caused by certain types of hardware errors (such as, non-responding peripherals and bus contention) or software errors (such as a bad code jump and a code stuck in loop). The STWD100 watchdog timer has an input, WDI, and an output, (active low) 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, (active low) WDO is asserted. Typical applications include telecommunications alarm systems, industrial equipment, networking, medical equipment, UPS (uninterruptible power supply) and automotive.

• Operating voltage range from 2.7V to 5.5V
• 26µA max VCC supply current
• 6.3ms watchdog timeout period
• Chip enable input
• Open drain or push-pull (active low) WDO output
• ESD performance: HBM: 2000V and CDM: 1000V
• Automotive qualified
• 100ns WDI glitch rejection
• 5 lead SOT23 package
• Temperature range from -40 to 125°C