HT7704
Touch Dimmer
Feature
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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
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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 (
µ
m)
2
* The IC substrate should be connected to VSS
in the PCB layout artwork.
1
27th Dec ’96
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
