Microchip Technology MTCH2120 Touch Controllers
The Microchip Technology MTCH2120 touch controllers provide designers with a simple path when implementing touch button functionality on user interfaces. These turnkey touch devices offer low power and water tolerance advantages, and are integrated with Microchip’s unified ecosystem to enable a simpler design process while facilitating transitions between other turnkey solutions. The MTCH2120 provides a robust touch experience that is immune to noise events and moisture, and is flexible enough to accommodate a wide range of product requirements. The Microchip Technology MTCH2120 touch controllers feature an I2C port expander function and an easy tuning feature that automatically adjusts sensitivity and filter levels based on real-time noise assessment.

Features
Easy to adjust
Automatically adjust sensitivity and filter levels based on real-time noise assessment
No threshold tuning required
MPLAB® Harmony host code configurator plug-in
Capacitive touch sensing
High signal-to-noise ratio (SNR)
Configurable via I2C bus
Adjustable sensitivity
Multi-level active noise suppression filter
Automatic environmental compensation
Water tolerant touch
Low power, optional combined sensor (once-in-one mode)
Configure GPIO as optional host interface
Supports a variety of sensor shapes and sizes
Touch state change interrupt pin
Optional disable or suspend sensor
Optional save configuration

Specifications
Operating voltage range: 3 V to 5 V
Source current range: -40mA to 40mA
250ms software reset
Operating temperature range: -40 °C to +105 °C
Power-off protection