IS31SE5100

Integrated Silicon Solution, Inc. – www.issi.com

1

Rev. C, 03/18/2013

8-CH CAPACITIVE TOUCH SENSOR WITH AUTO CALIBRATION

March 2013

GENERAL DESCRIPTION

The IS31SE5100 is an ultra low power, fully integrated

8-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 IS31SE5100 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.

IS31SE5100 is available in QFN-24 (4mm × 4mm) and

SSOP-24 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





QFN-24 (4mm × 4mm) and SSOP-24 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: