The ADM8323/ADM8324 are supervisory circuits that monitor power supply voltage levels and code execution integrity in microprocessor-based systems. An on-chip watchdog timer checks for activity within a preset timeout window. A reset signal can also be asserted by an external push button through a manual reset input. The RESET output is either a push-pull (ADM8323) or open-drain (ADM8324). A watchdog failure results in a low output on the RESET pin. A failure can be triggered either by a fast watchdog error (watchdog pulses too close together) or by a slow watchdog error (no watchdog pulse within the timeout period).This effectively gives a window in which to observe the watchdog pulse. The watchdog timeout is measured from the last falling edge of watchdog input (WDI).
Each part is available in a choice of 26 reset threshold options from 2.5 V to 5 V in 100 mV increments. There are also four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms (minimum).
The ADM8323/ADM8324 are available in 5-lead SOT-23 packages and typically consume only 10 µA, making them suitable for use in low power portable applications.
Features and Benefits
| Power Management |
| Document | note |
| ADM8323/ADM8324: Supervisory Circuits with Windowed Watchdog and Manual Reset in 5-Lead SOT-23 Data Sheet (Rev. A) | PDF 262 kB |
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
|---|---|---|---|---|---|---|
| ADM8323WCC29ARJZR7 Production | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.79 | Y |
| ADM8323WCC46ARJZR7 Production | 5 ld SOT-23 | REEL 3000 | -40 to 125C | 0 | 0.79 | Y |
