The DS1232 MicroMonitor™ Chip monitors three vital conditions for a microprocessor: power supply, software execution, and external override.
The DS1232 MicroMonitor™ chip monitors a microprocessor’s power supply, software execution, and external override. It provides power‑fail detection, push‑button reset with a minimum 250 ms pulse, and a watchdog timer that can be set to 150 ms, 600 ms, or 1.2 s time‑outs.
The datasheet includes pin assignments for 8‑pin DIP and 16‑pin SOIC packages, timing diagrams for reset and watchdog operations, absolute maximum ratings, and detailed electrical characteristics such as supply voltage range, input leakage, and output current capabilities.
| Supply Voltage (VCC) | 4.5 V – 5.5 V |
|---|---|
| Operating Temperature (Industrial) | -40 °C to +85 °C |
| Input Leakage Current (IIL) | -1 µA – +1 µA |
| Output Current @ 2.4 V (IOH) | -8 mA – -10 mA |
| Minimum Reset Pulse Width | 250 ms |
| Watchdog Timer Timeout Options | ≈150 ms, 600 ms, 1.2 s |
The push‑button reset generates an active reset pulse of at least 250 ms.
The watchdog timer can be set to approximately 150 ms, 600 ms, or 1.2 seconds.
The VCC pin may be exposed to -0.5 V to +7.0 V relative to ground.
The chip is offered in an 8‑pin mini‑DIP and an optional 16‑pin SOIC surface‑mount package.