CPT007B-A02-GM

Overview

The CPT007B-A02-GM is a capacitive touch sensor controller from the TouchXpress family, designed to replace mechanical buttons. It supports up to 7 capacitive sensor inputs and features 7 general-purpose outputs (GPOs) for host communication or LED driving. The device operates within a supply voltage range of 1.8 V to 3.6 V and functions in temperatures from -40 °C to +85 °C. It is housed in a compact 3 mm x 3 mm QFN-20 package with dimensions of 0.55 mm height. Power consumption is specified at 200 µA in active mode and 1 µA in sleep mode, supporting wake-on-proximity functionality.

Feature Summary

• Eliminates firmware development complexity through fixed-function operation
• Configured via a simple GUI-based tool without coding requirements
• Provides moisture immunity and enhanced user experience features

Applications

• Home appliances
• Instrument and control panels
• White goods
• Medical equipment
• Consumer electronics

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package integrity and pin alignment prior to assembly. Review end-of-life notifications as discontinuation status may affect long-term availability. Ensure ordering suffixes match required packaging formats. Validate supplier credentials to prevent counterfeit components.

Selection Notes

Select this component when firmware-free capacitive sensing is required for button interfaces. The GPIO interface suits applications where I2C overhead is unnecessary. Evaluate power constraints against the 1 µA sleep current specification. Consider the 7-input limit for system channel requirements. Verify compatibility with the intended PCB layout space for the QFN-20 package.

Part Context

This part belongs to the Silicon Labs TouchXpress family of fixed-function controllers. It shares design philosophy with devices like the CPT112S but utilizes a GPIO interface instead of I2C. The series targets rapid UI implementation by removing microcontroller dependency for basic touch detection tasks.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify cross-reference data directly from the manufacturer before considering alternative components.