Product Overview
DS1232+ from ADI/Maxim is a microprocessor monitor with power-on reset, brownout detection, and watchdog timer. Active-low reset with 350ms pulse. Three watchdog timeout options. Manual reset with internal debounce. + suffix = RoHS lead-free.
Working Principle
Monitors VCC and asserts reset when below threshold (4.87V for 5V). Watchdog requires periodic ST strobes; timeout causes reset. TD pin selects timeout. PBRST provides manual reset with debounce. Reset guaranteed active down to VCC=1V.
Pin Description
| Pin | Name | Function |
|---|---|---|
| 1 | PBRST | Pushbutton reset |
| 2 | TD | Timeout select |
| 3 | TOL | Tolerance select |
| 5 | RST | Reset (active low) |
| 6 | RST | Reset (active high) |
| 7 | ST | Watchdog strobe |
| 8 | VCC | 5V supply |
Applications
- Embedded MCU reset and watchdog
- Industrial supervisory
- Board-level system reset
Alternative Models
| Manufacturer | Part Number | Notes |
|---|---|---|
| TI | TPS3823-33DBVR | 3.3V supervisor |
| Microchip | TC1232CPA | Similar monitor |