IS31SE5114-LQLS3

Overview

The IS31SE5114-LQLS3 is a capacitive touch controller manufactured by Lumissil Microsystems, designed for button-based user interfaces. It supports up to 24 input channels and integrates LED driver capabilities with up to 24 output channels. The device operates on an I2C interface and functions within a supply voltage range of 2.3V to 5.5V. It features active proximity detection and consumes approximately 150µA of supply current. The component is housed in a 32-WFQFN package with exposed pads, measuring 5x5 mm, and is rated for operation between -40°C and 105°C.

Feature Summary

• Integrates capacitive sensing for up to 24 buttons with active proximity detection functionality
• Includes programmable LED driver outputs for visual feedback control
• Utilizes standard I2C communication protocol for system integration

Applications

• Capacitive touch button panels for industrial equipment
• User interface modules requiring integrated LED status indication
• Automotive interior control switches

Procurement Notes

Verify the specific suffix LQLS3 against official Lumissil documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint for the 32-QFN (5x5) package. Confirm moisture sensitivity level requirements during storage and handling procedures prior to assembly.

Selection Notes

Select this component when a single IC must handle both multi-button capacitive sensing and direct LED driving without external microcontrollers. Compare channel counts against the IS31SE5118A if fewer inputs are required. Verify that the 2.3V to 5.5V operating range aligns with the system power rails and that I2C bus speeds meet timing constraints.

Part Context

This part belongs to the IS31SE/IS32SE series of capacitive touch controllers from Lumissil Microsystems. These devices are engineered to replace mechanical switches in modern electronics, offering durability and design flexibility. The series typically combines touch sensing logic with peripheral drivers to reduce bill-of-materials complexity in compact designs.

Replacement Considerations

The IS31SE5118A offers similar functionality but with only 8 channels. Cross-reference pinouts and register maps before substitution. No other direct substitutes are confirmed in public documentation.