IS32SE5120A-QWLA3-TR

Overview

The IS32SE5120A-QWLA3-TR is a 24-channel programmable capacitive touch sensor manufactured by Lumissil Microsystems. It operates on a supply voltage of 2.3V to 5.5V and supports an I²C interface with 400kHz capability. The device features auto-detection for wakeup from sleep mode, which consumes under 10uA. It includes built-in hardware monitors and calibration to prevent false triggers, along with a shield output to increase moisture immunity. The controller supports proximity sensing and is available in a WQFN-32 package.

Feature Summary

• Supports 24-channel capacitive touch sensing with individual key threshold settings and readable key values.
• Features automatic and individual key calibration with baseline process based on difference detection.
• Includes interrupt output with auto-clear and repeating functions triggered by touch events.
• Provides buzzer and melody generation capabilities shared with touch key channels.

Applications

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

Procurement Notes

Verify the specific ordering suffix QWLA3 against official manufacturer documentation to confirm package type and compliance status. Ensure the component meets AEC-Q100 qualification requirements if automotive applications are intended. Confirm RoHS and Halogen-Free compliance through the datasheet specifications before procurement.

Selection Notes

Select this component when a low-power capacitive touch solution with up to 24 channels is required. Consider the WQFN-32 package dimensions and wettable flank design for surface mount assembly. Evaluate the need for integrated buzzer functionality or proximity sensing capabilities inherent to the IS32SE5120A architecture.

Part Context

The IS32SE5120A belongs to Lumissil Microsystems' family of ultra-low-power capacitive touch controllers. It is designed to replace mechanical buttons in various electronic devices. The device integrates necessary signal processing and communication interfaces to simplify host MCU interaction while maintaining high sensitivity and noise immunity.

Replacement Considerations

Check for pin-compatible alternatives within the same product family that may offer different channel counts or package options. Verify electrical characteristics and register compatibility if substituting with other models from Lumissil Microsystems.

FAQ

Does the IS32SE5120A support proximity sensing?

Yes, the IS32SE5120A can support proximity sensing as stated in its general description.

What is the maximum operating temperature for this device?

The device operates over a temperature range from -40°C to +125°C.

How does the device handle wake-up from sleep mode?

It uses auto-detection for wakeup, allowing keys to wake up the device from sleep mode.