M62021 datasheet(6/9 Pages) MITSUBISHI

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ELECTRIC

MITSUBISHI

M62021L,P,FP

MITSUBISHI<Dig.Ana.INTERFACE>

SYSTEM RESET IC WITH SWITCH FOR MEMORY BACK-UP

Input

voltage

Output

In normal operation

VOUT

RES

In failure(instantaneous drop)

Input voltage:5V

With Q4 set to ON,

a voltage

(VIN-VDROP)is output

The output level is

VOL(RES)

with a logic low

The output level is

VOH(RES)

with a logic low

The output level is

VOL(CS)

with a logic low

Input voltage:5V

Each output varies if the input

voltage drops to VSL or under

Q4 is turned OFF.A voltage

(VIN-Q4 VEB(Di) is output by

the diode between E and B of

As the state shifts from a logic

low to logic high,the output level

becomes approximately equal to

the input voltage

As the state shifts from a logic

high to logic low,the output level

becomes VOL(RES)

As the state shifts from a logic

low to logic high,the output level

becomes the voltage VIN-

Q4EB(Di).

Restoration from failure

(instantaneous drop)

Input voltage:4V

If the input voltage goes higher

than VSL by 100mV,each out-put

varies after delay produced by the

delay circuit

Q4 is turned ON after delay and

a voltage(VIN-VDROP) is output

A logic high is maintained,and than

shifts to a logic high

A logic low is held,and than shifts

to a logic high

A logic high is maintained,and than

shifts to a logic high

In backup state

Input voltage:0V

Backup voltage:3V

VBAT-VF

The output is a logic high

and the output level is

VBAT-VF

TIMING CHART

VIN

VOUT

RES

tpd

∆Vs

VSH

VSL

VOL(CS)

VIN(VSL)

VOL(RES)

VIN(VSL)

VOL(RES)

V1=VIN-VDROP

V2=VIN-Q4VEB(Di)

V3=VIN(VSL)-VDROP

V4=VIN(VSL)-Q4VEB(Di)

V5=VBAT-VF

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