REJ03D0528-0200 Rev.2.00 Jun 15, 2007

Page 1 of 12

M62023L/P/FP

System Reset IC with Switch for 3V Memory Back-up

REJ03D0528-0200

Rev.2.00

Jun 15, 2007

General Description

The M62023L/P/FP is a system reset IC that controls the memory backup function of an SRAM and an embedded RAM

of a microcontroller.

The IC outputs reset signals (RES/

RES) to a microcontroller at power-down and power failure. It also shifts the power

supply to RAMs from main to backup, outputs a signal (

CS) that invokes standby mode, and alters RAMs to backup

circuit mode.

Features

• Built-in switch for selection between main power supply and backup power supply to RAMs

• Small difference between input and output voltages (I

• Detection voltage (power supply monitor voltage): 2.57V typ.

• Chip select signal output (CS)

• Two channels of reset outputs (RES/RES)

• Power on reset circuit.

Application

Power supply control systems for memory of microcontroller systems in electronic equipment such as OA equipment,

industrial equipment, and home-use electronic appliances and SRAM boards with built-in backup function that require

switching between external power supply and battery.

Block Diagram

RES

CS

RES

GND

1

2

8

4

5

6

7

3

D1

SW

R1

Com

1.24V

Reset Circuit

Delay Circuit

R2