IMP1233M-55-S 查看數據表（PDF） - A1 PROs co., Ltd.

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IMP1233M-55-S

Low Power, 5V/3.0V µP Reset – Active LOW, Open-Drain Output – 350ms Reset Period

A1 PROs co., Ltd. 

IMP1811

Application Information

Operation – Power Monitor

The IMP1811 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. When an out-of-tolerance VCC

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

RESET is kept active (LOW) for approximately 150ms after the

power supply voltage has reached the selected tolerance. This

allows the power supply and microprocessor to stabilize before

RESET is released.

VCCTP (MIN)

tR

VCCTP (MAX)

VCCTP

VCC

tRPU

VOH

RESET

1811_07.eps

Figure 1. Timing Diagram: Power-Up

VCC

VCCTP (MAX)

VCCTP

tF

VCCTP (MIN)

RESET

tRPD

VOL

1811_08.eps

Figure 2. Timing Diagram: Power-Down

4

408-432-9100/www.impweb.com

© 1999 IMP, Inc.

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