CY8CMBR2044-24LKXI

Overview

The CY8CMBR2044 is a four-button CapSense controller featuring SmartSense auto-tuning and hardware configurability. It operates within a voltage range of 1.71 V to 5.5 V and supports an industrial temperature range from -40 °C to +85 °C. The device provides four general-purpose outputs (GPOs) linked directly to CapSense buttons, with supply current as low as 15 µA per button in run mode and 100 nA in deep sleep. It utilizes a 16-pad QFN package measuring 3 mm × 3 mm × 0.6 mm.

Feature Summary

• Hardware-configurable features via external resistors without software programming
• SmartSense auto-tuning for dynamic parameter adjustment and noise immunity
• Advanced sensing capabilities including Flanking Sensor Suppression and toggle modes
• Built-in system diagnostics for production testing and fault detection

Applications

• Consumer electronics requiring capacitive touch interfaces
• Industrial control panels with robust noise requirements
• Medical devices needing reliable user input mechanisms

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and temperature grade. Confirm that the component meets all relevant regulatory standards required for your target market before finalizing procurement decisions.

Selection Notes

Select this controller when a simple, hardware-configurable capacitive solution is needed without microcontroller programming. Ensure the design accommodates the required parasitic capacitance range and utilizes the SmartSense algorithm for optimal performance across varying environmental conditions.

Part Context

This component belongs to the CapSense Express family, designed for easy integration of capacitive sensing into embedded systems. It represents a specialized subset of Infineon's broader portfolio focused on reducing development time through automated tuning and hardware-based configuration options.

Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers. Verify pin compatibility and functional equivalence before considering any alternative components to ensure seamless integration into existing designs.

FAQ

How is the Scan Rate configured?

The scan rate is configured by connecting a specific resistor value between the ScanRate/Sleep pin and ground. Different resistance values correspond to different scan rates ranging from 20 ms to 530 ms.

What is the purpose of the CMOD pin?

The CMOD pin requires an external modulator capacitor, typically 2.2 nF (±10%), connected to ground. This capacitor is essential for proper CapSense operation and internal modulation functions.

Can the device operate in deep sleep mode?

Yes, the device enters deep sleep mode when the ScanRate/Sleep pin is pulled high by a host controller. In this state, current consumption drops to approximately 100 nA, and the device wakes up upon receiving a low signal on the same pin.