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
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.