CY8CMBR2110-24LQXI

Overview

The CY8CMBR2110 is a register-configurable CapSense Express controller supporting up to ten capacitive sensing buttons and ten general-purpose outputs (GPOs). It operates within a voltage range of 1.71 V to 5.5 V and features SmartSense Auto-Tuning for dynamic parameter adjustment. The device includes an I2C interface with speeds up to 100 kHz, Flanking Sensor Suppression (FSS), and system diagnostics. Power consumption in run mode is as low as 23 µA per button, with deep sleep current at 100 nA. It functions across an industrial temperature range of -40 °C to +85 °C and is housed in a 32-pin QFN package measuring 5 mm × 5 mm.

Feature Summary

• SmartSense Auto-Tuning algorithm dynamically adjusts parameters to maintain performance without manual tuning.
• Flanking Sensor Suppression (FSS) ensures robust sensing for closely spaced buttons by allowing only one touch state at a time.
• Advanced LED effects including power-on sequences, button touch feedback, and standby brightness control.
• System diagnostics report faults such as button shorts or improper capacitor values during power-up.

Applications

• Consumer electronics requiring capacitive touch interfaces
• Industrial control panels needing noise immunity
• Medical devices utilizing simple register configuration

Procurement Notes

Verify the specific ordering suffix against official Infineon documentation to confirm package type and temperature grade. Ensure the EZ-Click Customizer tool version matches the device revision for accurate configuration generation. Confirm I2C address settings if multiple controllers are used on the same bus.

Selection Notes

Select this component when firmware-free operation is required for up to ten buttons. It is suitable for designs needing direct GPO driving for LEDs or buzzers. Consider its wide voltage range for battery-powered applications. Evaluate the need for SmartSense auto-tuning to reduce development time compared to manually tuned solutions.

Part Context

This part belongs to the Cypress CapSense Express family, now under Infineon Technologies. It is designed as a standalone controller that simplifies capacitive touch integration by eliminating the need for complex microcontroller programming. It complements other PSoC solutions by offering a dedicated, low-power touch sensing alternative.

Replacement Considerations

Check for CY8CMBR2xxx series variants with different button counts. Verify pin compatibility if substituting with other CapSense Express controllers. Ensure the replacement supports the required I2C speed and operating voltage range.

FAQ

How does the device handle closely spaced buttons?

It uses Flanking Sensor Suppression (FSS) to ensure only one button registers a touch state at a time, preventing false triggers from adjacent buttons.

Can the device be configured without firmware?

Yes, it is register-configurable via the I2C interface using the EZ-Click Customizer tool, requiring no firmware coding on the host processor.

What is the purpose of the Attention/Sleep line?

This line controls I2C communication, manages device power consumption modes, and signals the host processor regarding CapSense button status changes.