CY8CMBR3106S-LQXI

Overview

The CY8CMBR3106S-LQXI is a register-configurable capacitive touch sensing controller from the Infineon CY8CMBR3xxx family. It supports up to 16 sensing inputs, including buttons, two sliders, and two proximity sensors. The device utilizes the CSD PLUS algorithm for high noise immunity and SmartSense Auto-tuning for dynamic performance maintenance. It operates on a 1.71-V to 5.5-V supply with an average current consumption of 22 µA per sensor at a 120-ms refresh interval. Communication with the host is handled via an I2C interface supporting up to 400 kHz.

Feature Summary

• Supports up to 16 sensing inputs configured as buttons, two sliders, or two proximity sensors
• Features SmartSense Auto-tuning to dynamically maintain optimal sensor performance without manual tuning
• Provides liquid tolerance to prevent false touches caused by water droplets, mist, or streaming water
• Includes system diagnostics to detect faults such as improper modulating capacitor values or sensor shorts

Applications

• Capacitive user interfaces requiring button, slider, and proximity detection
• Liquid-tolerant control panels for kitchen appliances or industrial environments
• Low-power battery-operated devices utilizing deep sleep modes and wake-on-approach features

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature range. Confirm that the required development tools, such as the EZ-Click Customizer software, are compatible with the selected component variant before finalizing procurement.

Selection Notes

Select this model when the design requires support for both sliders and proximity sensors alongside standard buttons. Ensure the application environment does not exceed the specified industrial temperature range. Verify that the host processor can accommodate the I2C communication protocol and that the available GPIOs match the required number of general-purpose outputs.

Part Context

This component belongs to the CY8CMBR3xxx CapSense Express controller family, which eliminates firmware development through register configurability. It is designed to replace traditional mechanical switches and knobs in human-machine interfaces, offering a streamlined development cycle compared to programmable microcontroller-based solutions.

Replacement Considerations

Consult the official datasheet selector guide for alternative part numbers within the CY8CMBR3xxx family. Variants such as the CY8CMBR3116 offer different input counts but may lack specific slider configurations. Ensure any substitute maintains compatibility with the existing I2C address and pinout requirements.