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

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HT7704

Touch Dimmer

Holtek Semiconductor 

HT7704

Functional Description

Selection table

There are 3 types of HT7704 and the following table illustrates their operating mode:

IC No.

HT7704A

HT7704B

HT7704C

OPT1

Open

Open

Bond to VDD

OPT2

Open

Bond to VDD

Open

Function

3 steps of controllable brightness

4 steps of controllable brightness

On/off the light

Flow Chart

• 3 steps (for the HT7704A)

The first touch turns the light on at it’s initial

brightness level. The second touch makes the

light a little brighter. The light is the brightest by

the third touch. Finally, the fourth touch turns

the light off.

• 4 steps (for the HT7704B)

Similarly with the 4-step. The first touch tuns

the light on at it’s initial brightness level. The

second touch makes the light brighter. The

brightness increases greatly on the third

touch and reaches it’s brightest on the fourth

touch, respectively. Finally the fifth touch

switches the light off.

4

27th Dec ’96

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