IMP1

233D

4

408-432-9100/www.impweb.com

Operation – Power Monitor

The IMP1233D detects out-of-tolerance power supply conditions.

It resets a processor during power-up and issues a reset to the sys-

tem processor when the monitored power supply voltage is below

voltage is detected, the RESET signal is asserted. On power-up,

RESET is kept active (LOW) for approximately 350ms after the

power supply voltage has reached the selected tolerance. This

allows the power supply and microprocessor to stabilize before

RESET is released.

Figure 1. Timing Diagram: Power-Up

Figure 2. Timing Diagram: Power-Down

RESET

1233D_06.eps

RESET

1233D_07.eps

Application Information