MC33164-3 データシートの表示（PDF） - Microsemi Corporation

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MC33164-3

5V UNDERVOLTAGE SENSING CIRCUIT

Microsemi Corporation 

PRODUCT DATABOOK 1996/1997

MC33164-3/MC34164-3

3V UNDERVOLTAGE SENSING CIRCUIT

PRODUCTION DATA SHEET

TYPICAL APPLICATION CIRCUITS

FIGURE 16. — LOW VOLTAGE MICROPROCESSOR RESET

VIN

Power

Supply

R

RESET

CDLY

Microprocessor

Circuit

1.2 VREF

FIGURE 17. — SWITCHING THE LOAD OFF WHEN

BATTERY REACHES BELOW 2.7V

VIN

Load

RESET

A time delayed reset can be accomplished with the addition of CDLY.

For systems with extremely fast power supply rise times (< 500ns) it

is recommended that the RC time constant be greater than 5.0µs.

DLY

V

is the microprocessor reset input threshold.

TH(MPU)

tDLY = R CDLY In

1

1

-

VTH(MPU)

VIN

FIGURE 18. — VOLTAGE MONITOR

VIN

Power

Supply

1.0k

RESET

1.2VREF

LED turns on when VIN < 2.7V indicating Power Supply is low.

1.2VREF

FIGURE 20. — SOLAR POWERED BATTERY CHARGER

VIN

1.2VREF

RESET

SOLAR

CELLS

PRODUCTION DATA - Information contained in this document is proprietary to LinFinity, and is current as of publication date. This document

may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of

all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.

Copyright © 1999

Rev. 1.2a 11/04

9

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