MTCH2120-V/REB

Overview

The MTCH2120-V/REB is a capacitance touch sensor IC from Microchip Technology, featuring the QTouchADC architecture. It supports up to 12 channels for button, slider, wheel, and proximity sensing configurations. The device operates on an I2C interface and is housed in a VQFN-20 package measuring 3 mm x 3 mm x 0.85 mm. It functions within a supply voltage range of 1.8 V to 5.5 V and withstands operating temperatures from -40°C to +85°C. This component is designed for high-noise immunity and water resistance.

Feature Summary

• Supports up to 12 capacitive touch channels with I2C interface
• Water-resistant design with active noise cancellation
• Operates on 1.8 V to 5.5 V supply voltage
• Configuration data stored on-chip

Applications

• Medical devices requiring reliable touch interfaces
• Industrial control panels exposed to harsh environments
• Kitchen appliances with waterproof requirements
• Outdoor self-service kiosks
• Wearable electronics

Procurement Notes

Verify the suffix REB indicates tape and reel packaging when sourcing. Confirm the V designation corresponds to the specified temperature grade (-40°C to +85°C). Ensure compatibility with the host system's I2C bus voltage levels. Check for moisture sensitivity handling requirements during storage and assembly. Validate that the VQFN-20 footprint matches the PCB layout specifications.

Selection Notes

Select this model for applications requiring up to 12 independent touch inputs. Choose the V/REB variant specifically for automated surface-mount assembly processes due to its reel packaging. Consider the I2C interface if the host microcontroller supports two-wire communication. Evaluate the need for water resistance and high signal-to-noise ratio features for the target environment.

Part Context

This part belongs to the MTCH2120 series of touch screen controllers by Microchip Technology. The series is designed to replace mechanical switches with durable, intuitive capacitive interfaces. The MTCH2120 expands channel capacity compared to lower-channel siblings like the MTCH1060, offering enhanced configurability via I2C.

Replacement Considerations

Direct pin-compatible replacements within the same family include other MTCH2120 variants with different packaging or temperature grades, such as MTCH2120-V/SOIC or MTCH2120T-V/REB. Verify that any substitute maintains the 12-channel capability and I2C interface requirements.