PST620DDB データシートの表示（PDF） - Mitsumi

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PST620DDB

System Reset (with battery back-up) Monolithic IC

Mitsumi 

MITSUMI

PST621

Pin No.

1

2

3

4

5

6

7

8

Pin name

VAC

VCC1

VCC2

TC

--------------------------------

RE

MODE

CE

GND

Block Diagram

PST620

System Reset (with battery back-up) PST620, 621

Function

Has +2.0V detection voltage to detect AC power supply and

stable power supply primary side, for quick power outage detection.

+5V main power supply

Back-up power supply (back-up capacitor connected)

Pulse width setting pin for pulse shaver

(capacitor and resistor connected)

Reset output

Switches 1-chip microcomputer mode with pulse

shaver output signal

Chip enable signal output (power outage detection signal)

GND

PST621

Absolute Maximum Ratings (Ta=25°C)

Item

Storage temperature

Operating temperature

Power supply voltage

TC input input voltage

Allowable loss

Symbol

TSTG

TOPR

VCC max.

VC max.

Pd

Rating

-40~+125°C

-20~+70°C

-0.3~+10V

VCC1+0.3V

450mW

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