CY8CMBR3002-SX1I

Overview

The CY8CMBR3002-SX1I is a register-configurable capacitive touch controller supporting two sensing inputs. It 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. The device utilizes the CSD PLUS algorithm for high noise immunity and SmartSense Auto-tuning to eliminate manual tuning. Communication with the host processor is handled via an I2C interface supporting up to 400 kHz. The component is housed in an 8-pin SOIC package.

Feature Summary

• SmartSense Auto-tuning dynamically compensates for environmental changes without manual intervention
• Liquid tolerance prevents false touches caused by water droplets or moisture
• System diagnostics detect modulating capacitor errors, sensor shorts, and out-of-range parasitic capacitance

Applications

• Capacitive button interfaces requiring minimal firmware development
• Battery-operated devices utilizing low-power operating modes
• Industrial control panels needing robust noise immunity

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and temperature grade. Confirm that the supplier provides original manufacturer data sheets. Cross-reference the part number with Infineon Technologies' current portfolio as Cypress Semiconductor products are now integrated into their lineup.

Selection Notes

Select this model when only two capacitive sensors are required. Note that this variant lacks I2C communication, relying instead on General-Purpose Outputs (GPOs) for status reporting. Ensure the design accommodates the absence of slider support and proximity sensing features found in higher-capacity family members.

Part Context

This component belongs to the CY8CMBR3xxx CapSense Express family developed originally by Cypress Semiconductor Corporation. Following corporate acquisition, the product line is managed and distributed by Infineon Technologies. The datasheet retains the original Cypress branding while noting the continuity of the product under the Infineon portfolio.

Replacement Considerations

Direct functional substitutes within the same family include the CY8CMBR3102-SX1I, which offers identical sensing capabilities but includes I2C communication support.