5V µP Power Supply Monitor and Reset Circuit
– Selectable Trip-Point Tolerance and Watchdog Period
– Push-Button Reset

The IMP1232LP/LPS microprocessor supervisor can halt and restart a “hung-up” or “stalled” microprocessor, restart a microprocessor after a power failure, and debounce and interface a manual push-button microprocessor reset switch. The low-power supervisors feature 40% lower supply current than the pin compatible Dallas Semiconductor DS1232LP/LPS.

KEY FEATUREs
◆ Pin compatible with the Dallas Semiconductor DS1232LP/1232LPS
   — 40% lower supply current
◆ 5V supply monitor
◆ Selectable watchdog period
◆ Debounce manual push-button reset input
◆ Precision temperature-compensated voltage reference and comparator
◆ Power-up, power-down and brownout detection
◆ 250ms reset time
◆ Active LOW open-drain reset and active HIGH push-pull output
◆ Selectable trip point tolerance: 5% or 10%
◆ Low-cost, surface mount packages: 8/16-pin SO, 8-pin DIP and 8-pin MicroSO
◆ Wide operating temperature –40°C to +85°C (N/EPA suffixed devices)