UT8803 datasheet(2/6 Pages) UTC

2 / 6 page

UT8803

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

2 of 6

www.unisonic.com.tw

QW-R502-094,B

PIN CONFIGURATION

UOU1

NII 1

II 1

VREF

GND

QTEST

TC1

CDS

TRIAC

RELAY

ZCD

VDD

II 2

NII 2

UOU2

PIN DESCRIPTION

PIN NO.

PIN NAME

FUNCTION

UOU1

First stage OP amp output

NⅡ1

First stage OP amp positive input

Ⅱ

First stage OP amp negative input

VREF

Reference voltage

GND

Ground

Time base for System Clock. The periods TTb =(1±20%)RC/1.1

QTEST

Test

TCI

Timer clock generator. The periods TTci =(1±20%)RC/1.1

CDS

CDS detect, inhibitory output in the daytime.

TRIAC

TRIAC output, active low

RELAY

RELAY output, active high

ZCD

Detect zero cross of AC line, synchronously pin TRIAC

VDD

Power supply

Ⅱ

Second stage OP amp negative input

N 2

Ⅱ

Second stage OP amp positive input

UOU2

Second stage OP amp output

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