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Notice: The information in this document is subject to change without notice

Low Power 5V / 3.3V µP Reset Active LOW, Open - Drain Output

ASM8500

rev 1.0

November 2003

Application Information

Operation - Power Monitor

The ASM8500 detects out-of-tolerance power supply

conditions. It resets a processor during power-up, power-

down and issues a reset to the system processor when the

monitored power supply voltage is below the reset threshold.

RESET signal is asserted. On power-up, RESET is kept

active (LOW) for approximately 1.5ms after the power supply

voltage has reached the selected tolerance. This allows the

power supply and microprocessor to stabilize before RESET

is released.

RESET

Figure 1: Timing Diagram: Power-Up

RESET

Figure 2: Timing Diagram: Power-Down