ASM1233A Просмотр технического описания (PDF) - Alliance Semiconductor

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ASM1233A

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

Alliance Semiconductor 

November 2003

rev 1.0

Application Information

Operation - Power Monitor

The ASM1233A detects out-of-tolerance power supply

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

down and generates a reset to the system processor when

the monitored power supply voltage is below the reset

threshold. When an out-of-tolerance VCC voltage is detected,

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

active (LOW) for approximatley 350ms after the power supply

voltage has reached the selected tolerance. This allows the

power supply and microprocessor to stablize before RESET

is released.

VCCTP (MIN)

tR

VCCTP (MAX)

VCCTP

ASM1233A

VCC

RESET

tF

VCCTP (MAX)

VCCTP

VCCTP (MIN)

tRPD

VOL

Figure 2: Timing Diagram: Power-Down

VCC

tRPU

RESET

Figure 1: Timing Diagram: Power-Up

VOH

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

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

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