IMP1233M View Datasheet(PDF) - A1 PROs co., Ltd.

Part Name

Description

Manufacturer

IMP1233M

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

A1 PROs co., Ltd. 

Application Information

Operation – Power Monitor

The IMP1817 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 (HIGH) 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.

I M P 1817

IMP1817

RESET

Microprocessor

RESET

VCCTP (MIN)

tR

VCCTP (MAX)

VCCTP

VIN

tRPU

1815_07.eps

Figure 1. RESET Valid to 0V VCC

RESET

VOL

1817_07.eps

Figure 2. Timing Diagram: Power-Up

VCC

VCCTP (MAX)

VCCTP

tF

VCCTP (MIN)

tRPD

RESET

VOH

RESET Slews with VCC

1817_08.eps

Figure 3. Timing Diagram: Power-Down

4

408-432-9100/www.impweb.com

© 1999 IMP, Inc.

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