sx8643 Semtech Corporation, sx8643 Datasheet - Page 31

• Manufacturer Part Number: sx8643
• Description: Ultra Low Power, Capacitive Button Touch Controller 12 Sensors With Enhanced Led Drivers
• 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 32 shows a simplified diagram of the INTB pin.
Revision 7_5, February 10
to host
R_INT
Figure 31
VDD
Figure 32
© 2010 Semtech Corp.
Simplified diagram of CN and CP
SX8643
Simplified diagram of INTB
Ultra Low Power, Capacitive Button Touch Controller
CN
CP
SX8643
INTB
31
VANA
VANA
(12 sensors) with Enhanced LED Drivers
INT
ASI
DATASHEET
www.semtech.com
SX8643