MTCH105T-I/ST

Overview

The MTCH105T-I/ST is a capacitive touch and proximity controller from Microchip Technology, designed for applications requiring simple digital output interfaces. It features five 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 and Threshold Hysteresis
• 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/ST' against official Microchip documentation to confirm the industrial temperature grade (-40°C to +85°C) and TSSOP-14 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 a multi-channel capacitive sensing solution with direct digital outputs is required. The MTCH105 variant provides five independent channels suitable for complex user interfaces. Consider the active guard feature if the application environment presents significant electromagnetic interference or requires high noise immunity.

Part Context

This part belongs to the MTCH10x family, which includes the MTCH102, MTCH105, and MTCH108 models. These devices share a common architecture for capacitive sensing but differ in channel count. The MTCH105 specifically offers five input/output pairs, bridging the gap between the dual-channel MTCH102 and the eight-channel MTCH108.

Replacement Considerations

Direct replacements within the same family include the MTCH102 (2-channel) or MTCH108 (8-channel), provided pinout and channel count adjustments are acceptable. Verify that any substitute maintains the required operating voltage and temperature specifications.