MTCH6303T-I/RG

Overview

The MTCH6303T-I/RG is a projected capacitive touch controller from Microchip Technology, housed in a 9x9 mm QFN-64 package. It supports up to 27 RX and 19 TX channels for multi-touch surfaces up to approximately 8 inches. The device provides ten simultaneous touch coordinates at typically 100 Hz for five touches. It integrates gesture recognition for taps, swipes, scrolling, pinching, and zooming. Communication interfaces include I²C and USB, selectable via the COMM_SEL pin. The controller operates on a 3 V supply and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports up to 27 RX and 19 TX sensor channels for projected capacitive touch screens.
• Provides multi-touch tracking for up to ten fingers with predictive tracking algorithms.
• Integrates a hardware suite for single and multi-finger gestures including taps, swipes, and pinch-to-zoom.
• Features dual communication protocols: I²C (base address 0x25) and USB HID.

Applications

• Industrial control panels and security systems requiring robust noise immunity.
• Home and office automation devices such as thermostats and lighting controls.
• Consumer electronics including audio systems and exercise equipment.
• Medical devices and printers utilizing cost-effective touch input solutions.

Procurement Notes

Verify the specific ordering suffix 'RG' corresponds to the QFN-64 package variant rather than the TQFP-64 ('PT') option. Confirm that the required high-voltage line driver, such as the MTCH652, is included in the bill of materials, as it is necessary for optimal signal-to-noise ratio performance. Ensure host firmware supports the pre-loaded Library Loader bootloader for subsequent updates.

Selection Notes

Select this component when designing projected capacitive interfaces requiring integrated gesture processing without heavy host CPU overhead. The MTCH6303 requires an external boost converter like the MTCH652 to drive TX electrodes effectively. Evaluate the need for USB versus I²C connectivity based on system architecture, as the interface is fixed by the COMM_SEL pin during initialization.

Part Context

This part belongs to the MTCH6303 family of touch controllers. The 'I' designation indicates an industrial temperature rating (-40°C to +85°C). The 'T' suffix denotes tape and reel packaging. The 'RG' suffix specifies the 64-pin QFN package. Other variants include the MTCH6303T-I/PT, which utilizes a TQFP-64 package but shares identical electrical and functional specifications.

Replacement Considerations

The MTCH6303T-I/PT serves as a direct package alternative offering the same functionality in a TQFP-64 footprint. No other cross-model substitutes are documented; replacement requires re-evaluation of PCB layout and firmware due to pinout differences between QFN and TQFP packages.