REJ03D0780-0200 Rev.2.00 Jun 15, 2007

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M5295AL/AP/AFP

Watchdog Timer

REJ03D0780-0200

Rev.2.00

Jun 15, 2007

Description

M5295A is a semiconductor integrated circuit which is designed for system reset to detect +5 V power supply.

This IC keeps the operation microcomputer watching. When the system is abnormal, it generates reset output until the

system returns to normal states of the system.

It is possible to vary the two detective voltage by connecting the resistor, so it is suitable to high quality and high

performance system.

Features

• Watchdog timer

• Power on reset timer

• Low circuit current: 0.8 mA (Typ, V

• Wide supply voltage range: V

Application

• Microcomputer system

Recommended Operating Condition

• Supply voltage range: 4 V to 15 V

• Rated supply voltage: 5 V

Block Diagram

WD

1

TC

2

GND

4

RST1

3

ADJ1

5

RST2

7

6

ADJ2

8

30k

1.24V

20k

18.8k

51.2k

20.4k

+

–

+

–

+

–

+

–

F.F

F.F

F.F

W.D.T

Reference voltage

generator circuit

49.6k