MTCH108T-I/SS

Overview

The MTCH108T-I/SS is a capacitive proximity and touch controller from the Microchip mTouch family, designed for applications requiring simple digital output interfaces. It features eight sensor inputs with active guarding capability to suppress noise and ensure reliable detection. The device operates within a voltage range of 2.05V to 3.6V and supports an operating temperature range of -40°C to +85°C. Sensitivity and power modes are configurable via dedicated pins, allowing optimization for various sensor sizes and environmental conditions.

Feature Summary

• Capacitive Proximity and Touch Detection System
• Multi-stage Active Noise Suppression Filters
• Smart Scan Scheduling
• Flexible Low-Power Mode

Applications

• Light Switch
• Portable Device Enabler
• White Goods and Appliance
• Office Equipment and Toys
• Display and Keypad Back-Lighting Activation

Procurement Notes

Verify the specific ordering suffix 'I/SS' against the manufacturer's current documentation to confirm the industrial temperature grade (-40°C to +85°C) and SSOP-20 package type. Ensure compatibility with system voltage requirements (2.05V to 3.6V) and interface logic levels before integration.

Selection Notes

Select this component when eight independent proximity or touch channels are required with minimal host processor overhead. The MTCH108 provides open-drain outputs that simplify interfacing with embedded controllers. Consider the active guard feature if the application environment presents significant electromagnetic interference or nearby noise sources.

Part Context

This part belongs to the MTCH10x family, which includes the MTCH102 and MTCH105 variants offering fewer channels. The MTCH108 specifically provides eight sensor inputs, making it suitable for larger touch surfaces or multiple distinct buttons compared to the dual-channel MTCH102 or five-channel MTCH105.

Replacement Considerations

Direct substitutes within the same family include the MTCH105T-I/SS for reduced channel count or the MTCH102T-I/SS for minimal configurations. Verify pinout compatibility and software configuration differences when migrating between these variants.