HT7704 Datasheet, PDF (1/7 Pages) Holtek Semiconductor Inc – Touch Dimmer

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