MTCH6102-I/SS

Overview

The MTCH6102-I/SS is a low-power projected capacitive touch controller manufactured by Microchip Technology, housed in a 28-pin SSOP package. It supports up to 15 sensor channels for detecting taps, swipes, and scrolling gestures on XY touch pads. The device operates within a supply voltage range of 1.8V to 3.6V and functions across an industrial temperature range of -40°C to +85°C. Communication with the host controller is facilitated via an I²C interface supporting speeds up to 400 kbps. Key electrical characteristics include a typical standby current of less than 500 nA and an active mode current potentially below 12 µA.

Feature Summary

• Supports up to 15 sensor channels with individual channel tuning for optimal sensitivity.
• Detects gestures including taps, swipes, and scrolling with >200 reports per second.
• Features ultra-low power consumption with standby mode <500 nA (typical).
• Provides 12-bit resolution coordinate reporting and configurable sleep/idle frame rates.

Applications

• Wearable devices such as headphones, watches, and fitness wristbands.
• Track pads and computer peripherals requiring single-finger gesture control.
• Input devices with configurable buttons, keypads, or scrolling functions.
• Home automation control panels and security control keypads.
• Automotive center stack controls and gaming devices.

Procurement Notes

Verify the ordering suffix matches the required package type; the '-I/SS' designation specifically indicates the Industrial temperature grade (-40°C to +85°C) and the 28-SSOP physical package. Confirm that the application design accommodates the 28-pin SSOP footprint dimensions. Ensure the host system supports the standard I²C protocol and can handle the default 7-bit base address of 0x25 unless modified via configuration registers.

Selection Notes

Select this component when designing cost-sensitive, low-power interfaces requiring gesture recognition without complex host processing. It is suitable for applications using PCB, film, glass, or flexible printed circuit sensors with cover layers up to 3 mm plastic or 5 mm glass. Consider the maximum sensor size support of 120 mm and the need for external decoupling capacitors (0.1 µF recommended) during layout. Evaluate if the 15-channel limit meets the specific X/Y axis requirements of the target touch surface.

Part Context

The MTCH6102 is part of Microchip’s turnkey projected capacitive touch controller family, designed to simplify integration into various consumer electronics. It serves as a dedicated solution for adding gesture capabilities to touch interfaces, reducing the burden on the main host processor. The device complements other Microchip touch solutions by offering a balance of performance, power efficiency, and ease of use for mass-market applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Microchip technical support for alternative components if pin compatibility or functional equivalence is required for existing designs.

FAQ

What is the default I²C address for the MTCH6102?

The default 7-bit base address is 0x25. This results in a write address of 0x4A and a read address of 0x4B after appending the Read/Write bit.

How does the INT pin behave during operation?

The INT pin is an open-collector active-low output asserted when new data is available. It is automatically released upon reading any register or when the next decoding frame begins.

What types of sensor materials are supported?

The controller works with Printed Circuit Board (PCB) sensors, film, glass, and Flexible Printed Circuit (FPC) sensors, provided they meet the minimum overlay thickness requirements.