Two-channel touch control chip
1. GENERAL DESCRIPTION
SL8022K is a two-channel capacitive touch chip with two logic-control output.
¾ Realization of logical function by a touch operation. Low operational difficulty and convenient.
¾ High applicability. Touching function is still effective with the existance of medium (such as
glass, arcrylic, plastic, ceram, etc.) isolation.
¾ Wide range of applied voltage, which could be chosen optionally within 2.4V~5.5V.
Low cost. SL8022K could be drived by a si mple peripheral circuit, easy to machining.
¾ High stability and good anti-interfere property. SL8022K has a value of EFT over ±2KV.
Under the interference of mobile phones which exist in a near-field and multi-angle situation,
the touching sensitivity and response time of SL8022K proves to be fine.
2. FEATURES
îš‹ The initial state of pin LO1 and LO2 after electrified depend on the input state of pin OSC
before power on . Pin LO1 and LO2 output high level after power on If pin OSC is connected
to VDD(High Level),; pin LO1 and LO2 output low level after power on. if pin OSC is
connected to GND(Low Level),
îš‹ A touch operation input through TI1 corresponds to logic ouput of LO1; a touch operation
input through TI2 correspinds to logic output of LO2.
îš‹ A press operation on TI1 or TI2 corresponds to the reversal of the logic output of LO1 or
LO2; the state reverts to initial state after the release
SL8022K
1
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3. PACKAGING and PIN ASSIGNMENT
SL8022KD DIP8
SL8022KS SOP8
Pin number Pin name Input/Output Functional Specification
1 OSC Input functional optipn
2 VC Input sampling capacitor input
3 VDD Source positive electrical source
4 GND Source negative electrical source
5 TI1 Input touch input
6 TI2 Input touch input
7 LO1 Output control output
8 LO2 Output control output
SL8022K
2
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