HT7704 データシートの表示（PDF） - Holtek Semiconductor

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HT7704

Touch Dimmer

Holtek Semiconductor 

HT7704

Touch Dimmer

Feature

• Operating voltage: 4~10V

• High noise immunity CMOS technology

• High sensitivity and stability

• Polarity insensitive with AC line

• Minimal external components required

• Loading range of sense input from 0 to 1000pf

• 50/60 Hz selectable

• HT7704A: 3 steps control

HT7704B: 4 steps control

HT7704C: On/off switch

• 8 pin DIP/SOP package

General Description

The HT7704 series are CMOS LSIs in 8-lead DIP

package. They are designed to control the bright-

ness of an incandescent lamp by changing the

triggering angles of the TRIAC with touch sense

input.

HT7704 is a selectable 3-step, 4-step or on/off

switch function dimmer. High sensitivity and

stability account for its eminent performance.

The sense input can sustain very heavy capaci-

tive loading and propagate sense through a

highly resistive line. In addition, the applica-

tion circuit is very simple.

Pin Assignment

Pad Assignment

Chip size: 1640 × 1620 (µm)2

* The IC substrate should be connected to VSS

in the PCB layout artwork.

1

27th Dec ’96

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