IS31SE5104 Datasheet, PDF (1/13 Pages) Integrated Silicon Solution, Inc – 4-CH CAPACITIVE TOUCH SENSOR WITH AUTO CALIBRATION

IS31SE5104
4-CH CAPACITIVE TOUCH SENSOR WITH AUTO CALIBRATION
December 2013
GENERAL DESCRIPTION
The IS31SE5104 is an ultra low power, fully integrated
4-channel solution for capacitive touch-buttons
applications. The chip allows electrodes to project
sense fields through any dielectric such as glass or
plastic. On-chip calibration logic continuously monitors
the environment and automatically adjusts on-and-off
threshold levels to prevent false sensor activation.
The IS31SE5104 supports the 400kHz I²C serial bus
data protocol and includes a field programmable slave
address. An INTB is generated when a button event
(touched or released) occurs, triggered and cleared
condition could be configured by setting the interrupt
register.
IS31SE5104 is available in QFN-16 (3mm × 3mm) and
SOP-16 packages. It operates from 2.7V to 5.5V over
the temperature range of -40°C to +85°C.
FEATURES
 Complete eight sensors capacitive touch
controller for buttons
 Auto offset compensation
 Sensitivity adjustable by external capacitor or
internal register
 Extremely low power optimized for portable
application
 Interrupt output
 400kHz fast-mode I²C interface
 8kV ESD HBM
 Operating temperature T_A = −40°C ~ +85°C
 QFN-16 (3mm × 3mm) and SOP-16 packages
APPLICATIONS
 Mobile phones
 GPS
 PDAs
TYPICAL APPLICATION CIRCUIT
Figure 1 Typical Application Circuit
Note 1: The IC should be placed far away from the mobile antenna in order to prevent the EMI.
Note 2: The R_S resistor should place as close as possible to reduce EMI.
Integrated Silicon Solution, Inc. – www.issi.com
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Rev. A, 12/25/2013