IS31SE5104
Integrated Silicon Solution, Inc. – www.issi.com 1
Rev. C, 08/05/2015
4-CH CAPACITIVE TOUCH SENSOR WITH AUTO CALIBRATION
August 2015
GENERAL DESCRIPTION
The IS31SE5104 is a low power, fully integrated
4-channel solution for capacitive touch button
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 active low interrupt signal is generated on
the INTB pin whenever a button event (touched or
released) is detected. The triggered and cleared
condition can be configured by setting the interrupt
register.
IS31SE5104 is available in either a QFN-16 (3mm ×
3mm) or SOP-16 package. It operates from 2.7V to
5.5V over the temperature range of -40°C to +85°C.
FEATURES
Four capacitive touch sensor controller
Auto offset compensation
Sensitivity adjustable with external capacitor or
internal register
Low power optimized for portable applications
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.
Note 3: The OUTx pin is open drain structure inside. To configure the OUTx pin as a logic signal output use a 100k pull up resistor.
