(

/ 9 )

ELECTRIC

MITSUBISHI

M62021L,P,FP

MITSUBISHI<Dig.Ana.INTERFACE>

SYSTEM RESET IC WITH SWITCH FOR MEMORY BACK-UP

4

Pin No.

Symbol

Name

Function

1

Power supply output

and the like

2

Backup power supply input

Backup power supply is connected to this pin

If a lithium battery is used,insert a resistor in series for safety purposes

3

Power supply input

+5V input pin.Connect to a logic power supply.

4

Ct

Delay capacitor connection pin

A delay capacitor is connected to this pin.By connecting a capacitor,it is

possible to delay each output

5

6

7

8

RES

GND

RES

CS

Positive reset output

Ground

Negative reset output

Chip select output

Reference for all signals

Connect to the positive reset input of a microcomputer.The pin is capable

of flowing 1mA sink current

Connect to the negative reset input of a microcomputer.The pin is capable

of flowing 1mA sink current

Connect to the chip select of RAM.The CS output is at low level in normal

state thereby letting RAM be active.Under failure or backup condition,the CS

output is set to high level,then RAM enters standby state disabling read/write

function.The pin is capable of flowing a 1mA sink current

EXPLANATION OF TERMINALS

APPLICATION EXAMPLE

+

-

8

4

6

GND

RESET

CIRCUIT

DELAY

CIRCUIT

RES

RES

Com

1.24V

R1

R2

D1

3

7

5

2

1

M62021

CS

Ct

CPU

CMOS

RAM

CONT

BATTERY

3V

+5V

(MAIN POWER SUPPLY)

*If connecting a zener diode,select one of VZ=2~3V