sx8638 Semtech Corporation, sx8638 Datasheet - Page 33

• Manufacturer Part Number: sx8638
• Description: Low Power, Capacitive Button And Slider Touch Controller 8 Sensors With Enhanced Led Drivers And Proximity
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
4.3 Host interface pins
The host interface consists of the interrupt pin INTB, a reset pin RESETB and the standard I2C pins: SCL and
SDA.
INTB
The INTB pin is an open drain output that requires an external pull-up resistor (1..10 kOhm). The INTB pin is
protected to VDD using dedicated devices. The INTB pin has diode protected to GROUND.
Figure 37 shows a simplified diagram of the INTB pin.
Revision 7_6, September 10
to host
R_INT
Figure 36
VDD
Figure 37
© 2010 Semtech Corp.
Simplified diagram of CN and CP
Low Power, Capacitive Button and Slider Touch Controller
SX8638
Simplified diagram of INTB
(8 sensors) with Enhanced LED Drivers and Proximity
CN
CP
SX8638
INTB
33
VANA
VANA
INT
ASI
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SX8638