CY8CMBR3102-SX1I

Overview

The CY8CMBR3102-SX1I is a register-configurable capacitive touch controller supporting two sensing inputs. It operates on a supply voltage ranging from 1.71 V to 5.5 V and supports an I2C interface with speeds up to 400 kHz. The device features SmartSense Auto-tuning for dynamic performance maintenance and liquid tolerance to prevent false touches in wet conditions. It includes system diagnostics, flanking sensor suppression, and wake-on-approach capabilities. The component is available in an 8-pin SOIC package and functions within an industrial temperature range of -40 °C to +85 °C.

Feature Summary

• Register-configurable architecture eliminates firmware development requirements
• SmartSense Auto-tuning algorithm compensates for environmental variations
• Liquid tolerance design prevents false touches caused by moisture or water droplets
• System diagnostics detect modulating capacitor faults and sensor shorts

Applications

• Capacitive button interfaces requiring minimal development time
• Proximity detection systems utilizing wake-on-approach functionality
• User interfaces operating in high-noise electromagnetic environments
• Applications requiring robust operation under wet or humid conditions

Procurement Notes

Verify the specific ordering suffix against official Infineon documentation to ensure correct package type and temperature rating. Confirm that the requested part number matches the exact feature set required for the application, as suffixes may indicate variations in packaging or material compliance. Cross-reference the datasheet revision history to ensure compatibility with existing design files.

Selection Notes

Select this model when only two sensing channels are necessary for the user interface design. The CY8CMBR3102 variant lacks slider support compared to higher-channel family members but retains core auto-tuning and diagnostic features. Ensure the host processor supports the I2C communication protocol required for configuration and status monitoring.

Part Context

This component belongs to the CY8CMBR3xxx CapSense Express family developed originally by Cypress Semiconductor and now maintained by Infineon Technologies. The family provides a platform for rapid capacitive touch implementation without custom firmware. The CY8CMBR3102 represents the entry-level configuration within this series, offering essential sensing capabilities in a compact form factor.

Replacement Considerations

The CY8CMBR3002 serves as a functional alternative within the same family. Verify if the replacement supports the required I2C interface and diagnostic features, as some lower-tier variants may lack specific communication protocols or advanced sensing modes present in the CY8CMBR3102.