CY8CMBR3110-SX2I

Overview

The CY8CMBR3110-SX2I is a register-configurable capacitive touch controller from the CapSense Express family. It supports up to 10 sensing inputs, configured as buttons or proximity sensors. The device operates on a supply voltage range of 1.71 V to 5.5 V and functions within an industrial temperature range of -40 °C to +85 °C. Communication with a host processor is handled via an I2C interface supporting speeds up to 400 kHz. The component utilizes SmartSense Auto-tuning for dynamic performance maintenance and includes system diagnostics for fault detection.

Feature Summary

• SmartSense Auto-tuning algorithm eliminates manual tuning by continuously compensating for environmental changes and manufacturing variations.
• Liquid tolerance capability prevents false touches caused by water droplets, mist, or streaming water through shield electrode configurations.
• Flanking Sensor Suppression (FSS) distinguishes between signals from closely spaced buttons to eliminate false touches.
• System diagnostics detect improper modulating capacitor values, out-of-range parasitic capacitance, and sensor shorts.

Applications

• Capacitive button replacement in consumer electronics
• Proximity sensing interfaces requiring wake-on-approach functionality
• Industrial control panels requiring liquid tolerance

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure package and tape/reel specifications match the design requirements. Confirm RoHS compliance status and moisture sensitivity level prior to assembly planning. Cross-reference the part number with official Infineon documentation to validate availability and any potential obsolescence notices.

Selection Notes

Select this model when a fixed configuration of 10 sensing channels is required without firmware development. Ensure the application environment falls within the specified -40 °C to +85 °C operating range. Verify that the host system supports I2C communication and can accommodate the required pull-up resistors for SDA and SCL lines.

Part Context

This component belongs to the CY8CMBR3xxx family of CapSense Express controllers. These devices are designed to replace mechanical switches and knobs with capacitive sensing solutions. The family shares common features like SmartSense Auto-tuning but varies in the number of supported buttons, sliders, and proximity sensors.

Replacement Considerations

Direct replacements within the same family include CY8CMBR3102, CY8CMBR3106S, CY8CMBR3108, and CY8CMBR3116. Selection depends on the required number of sensing inputs and specific feature sets such as slider support or buzzer output capabilities.

FAQ

Does the CY8CMBR3110 support slider inputs?

No, the CY8CMBR3110 supports up to 10 buttons or proximity sensors. Slider functionality is available in other models within the family, such as the CY8CMBR3106S.

How does the device handle wet conditions?

The device offers liquid tolerance features that prevent false touches due to water droplets, mist, or streaming water. This is achieved by enabling the shield electrode and guard sensor through the register map.

What is the maximum I2C clock speed?

The I2C interface supports speeds up to 400 kHz.