IS31SE5118A-QFLS3-TR

Overview

The IS31SE5118A-QFLS3-TR is an ultra-low power, 8-channel capacitive touch sensor controller manufactured by Lumissil Microsystems. It operates within a supply voltage range of 2.35V to 5.5V and supports an industrial temperature range from -40°C to +105°C. The device features an on-chip I²C slave controller with a maximum clock frequency of 400kHz for host MCU communication. Key electrical parameters include a quiescent current of 50μA at 5.5V and a minimum detectable capacitance of 0.2pF. It is housed in a QFN-16 package and includes hardware monitors, auto-detection wakeup, and a buzzer/melody generator.

Feature Summary

• Supports 8 individual capacitive touch channels with readable key values and programmable thresholds.
• Features an integrated buzzer and melody generator capability for audio feedback applications.
• Includes auto sleep mode with wake-up functionality triggered by specific keys to minimize power consumption.
• Provides shield output configuration to enhance moisture immunity and reduce false triggers.

Applications

• Touch keys for home appliances
• Touch keys for industrial control

Procurement Notes

Verify the exact ordering part number IS31SE5118A-QFLS3-TR against the manufacturer's official documentation to ensure correct package type (QFN-16) and lead-free compliance. Confirm that the required operating voltage and temperature ranges align with your system specifications before finalizing procurement.

Selection Notes

Select this component when an 8-channel capacitive touch interface with low power consumption is required. Ensure the host system supports I²C communication at up to 400kHz. Consider the QFN-16 package constraints for PCB layout and thermal management if operating near the upper limits of the specified temperature range.

Part Context

This component belongs to the IS31SE5118 series of capacitive touch controllers from Lumissil Microsystems. The suffix '-QFLS3-TR' specifically denotes the QFN-16 package variant supplied in tape and reel format. Other variants in the series may offer different package options such as TSSOP-16.

Replacement Considerations

Direct substitutes must match the 8-channel capacitive touch architecture, I²C interface, and QFN-16 package. Verify pin compatibility and register mapping if replacing with other Lumissil models or competitors offering similar multi-channel touch solutions.