STWD100 Watchdog Timer Circuit

Low-power Watchdog with Chip-Enable Pin Eases Manufacturing Process

Image of STMicroelectronics' STWD100 Watchdog Timer CircuitSTMicroelectronics' watchdog timer circuits are self-contained devices used to detect an out-of-control MCU, thus improving system reliability. The STWD100 prevents system failures caused by certain types of hardware errors (non-responding peripherals, bus contention) or software errors (bad code jump, code stuck in loop). The STWD100 offers low power consumption for minimal impact on system total consumption, a choice of multiple time-out periods for maximum flexibility and comes in small packages simplifying board space optimization.

Features Applications
  • Current consumption 13 µA typ.
  • Available watchdog timeout periods are 3.4 ms, 6.3 ms, 102 ms, and 1.6 s
  • Chip-enable input
  • Open drain or push-pull WDO output
  • Operating temperature range: -40°C to +125°C
  • Package SOT23-5, SC70-5 (SOT323-5)
  • Security equipment
  • Financial systems
  • Medical equipment
  • Networking devices
  • Communication, computer, consumer, and medical

STWD100 Watchdog Timer Circuit

ImageManufacturer Part NumberDescriptionAvailable Quantity
STWD100NYWY3F datasheet linkIC WATCHDOG TIME CIRCUIT SOT23-5STWD100NYWY3FIC WATCHDOG TIME CIRCUIT SOT23-562691 - Immediate
STWD100NYWY3F product page link
STWD100NPWY3F datasheet linkIC WATCHDOG TIME CIRCUIT SOT23-5STWD100NPWY3FIC WATCHDOG TIME CIRCUIT SOT23-53591 - Immediate
STWD100NPWY3F product page link
Published: 2013-07-02