MTCH108-I/GZ - 8-Channel Capacitive Touch Controller | Microchip
MPN: MTCH108-I/GZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.33 | $2.33 |
| 10 | $2.1 | $21.00 |
| 100 | $1.85 | $185.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.41 | $1,410.00 |
MTCH108-I/GZ Overview
A capacitive touch controller (also called a proximity/touch sensor IC) is a mixed-signal device that measures changes in capacitance on a sensor electrode and converts them into a clean digital logic level. MTCH108 sits in the broader sensor IC hierarchy: sensor IC -> capacitive sensor -> touch controller -> human-interface IC -> power management and sensing subsystem. It typically sits upstream of an MCU which reads the 8 digital output pins to interpret user gestures.
Key features include 8 independent sensing channels, an advanced optimization algorithm that actively suppresses environmental noise from the signal path, configurable sensitivity per channel, configurable power mode (low-power standby vs active scan), and 8 simple push-pull digital outputs that mirror touch state. The UQFN-20 (4x4 mm) package is optimized for compact front-panel PCB layouts and is compatible with standard reflow profiles.
Typical applications include white-good front panels (washing machines, dishwashers, induction cooktops), industrial HMI keypads, smart-home wall switches, lighting control panels, automotive interior controls (with appropriate AEC-Q100 variant where required), and any battery-powered product requiring mechanical-button replacement. The integrated noise-suppression algorithm makes it well suited to appliances with motors, relays or other EMC noise sources.
When designing with this device, route the sensor electrodes directly to the MTCH108 pins, keep the electrode traces short, and follow Microchip's recommended ground-ring and hatch-fill pattern around each electrode for stable touch performance. A 100 nF decoupling capacitor on VDD placed within 5 mm of the IC is required.
Drop-in alternatives for MTCH108-I/GZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MTCH108-I/GZ (same form factor and footprint) — differing in Noise Suppression, Package, Number of Digital Outputs, Operating Temperature Range, Sensitivity Configuration.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MTCH108T-I/GZ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MTCH108-I/SS
✅ Drop-In✓ In Stock
$1.18 / Unit
View Datasheet →MTCH108-I/GZ Maximum Ratings & Electrical Characteristics
| Function | Capacitive proximity/touch controller |
| Number of Channels | 8 |
| Number of Digital Outputs | 8 (one per channel) |
| Output Type | Digital (simple push-pull) |
| Sensitivity Configuration | Configurable per channel |
| Power Mode | Configurable (active / low-power standby) |
| Noise Suppression | Advanced optimization algorithm (active) |
| Interface to Host | Direct digital GPIO read (no I2C/SPI required) |
| Operating Temperature Range | -40 C to +85 C (industrial, per -I suffix) |
| Package | 20-pin UQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
MTCH108-I/GZ 20-pin uqfn (4x4 mm) Pin Configuration Guide
Pin configuration for MTCH108-I/GZ (20-pin uqfn (4x4 mm) package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for MTCH108-I/GZ.
Refer to the datasheet for full pin configuration.
Typical Applications
MTCH108-I/GZ is suitable for 6 applications: White-Goods Appliance Front Panels, Industrial HMI Keypads, Smart-Home Wall Switches and Lighting Controls, Automotive Interior Touch Controls, Consumer Electronics Touch Interfaces, Medical and Wellness Device Front Panels.
White-Goods Appliance Front Panels
The MTCH108-I/GZ drives touch keypads on washing machines, dishwashers, ovens, induction cooktops and refrigerators where mechanical buttons would fail under repeated exposure to water, grease and cleaning agents. Its 8 channels map directly to typical 6-8 button appliance interfaces (power, program select, temperature, start/cancel, etc.), and the integrated noise-suppression algorithm rejects EMI from universal motors, relays and switch-mode power supplies common in white-goods. With an industrial -40 C to +85 C operating range and UQFN-20 (4x4 mm) package, it fits behind glass, acrylic or ABS overlays up to 6 mm thick while staying inside tight front-panel PCB area constraints. Sensitivity is configurable per channel so designers can tune for proximity wake-up (hand approaching the panel) and direct touch in the same device.
Recommended
Industrial HMI Keypads
In factory-floor human-machine interfaces, the MTCH108-I/GZ replaces mechanical push-buttons that suffer from dust ingress, vibration and mechanical wear. The 8 channels support a 4x4 matrix-style keypad, a slider strip plus discrete keys, or eight independent function keys with status LEDs. The advanced noise-suppression algorithm is critical on factory floors where variable-frequency drives, motor starters and welding equipment inject broadband EMI. Operating range of -40 C to +85 C covers unconditioned control cabinets, and the UQFN-20 (4x4 mm) footprint fits on small daughterboards that retrofit legacy membrane keypads. Designers can lock sensitivity per channel to prevent false triggers from water spray or gloved-hand operation, both common in industrial environments.
Recommended
Smart-Home Wall Switches and Lighting Controls
Smart-home wall switches need to look like solid glass or acrylic panels with no mechanical buttons, and the MTCH108-I/GZ detects touch or proximity through the overlay to control lighting, blinds and HVAC scenes. Its 8 channels handle 8 configurable zones on a single-gang or double-gang switch, and the configurable low-power standby mode supports battery-powered wireless switches (Zigbee, BLE, Matter) that wake on touch and sleep the rest of the time. Capacitive sensing through 3-4 mm tempered glass provides the premium user experience consumers expect. Because the device outputs simple digital levels, even low-cost wireless MCUs can read touch state without running a touch library, reducing BOM and firmware load.
Recommended
Automotive Interior Touch Controls
Automotive interior touch surfaces (steering wheel buttons, overhead console controls, door-panel switches, center stack sliders) increasingly use capacitive sensing for clean industrial design. The MTCH108-I/GZ's 8 channels can replace a row of mechanical switches on steering wheels or door trims, supporting gesture-style 2D touchpads when channels are arranged in a matrix. The integrated noise-suppression algorithm rejects alternator and ignition noise that would otherwise couple into the sensor electrodes. For production automotive programs, designers should validate the AEC-Q100-qualified equivalent from Microchip's portfolio, but the MTCH108-I/GZ family architecture and tuning flow apply directly, shortening the design cycle from prototype to qualified part.
Recommended
Consumer Electronics Touch Interfaces
Consumer devices such as coffee makers, air purifiers, robot vacuums and personal care appliances use the MTCH108-I/GZ to replace membrane keypads with sealed glass or plastic surfaces that improve aesthetics and simplify cleaning. The 8 channels support direct touch plus a proximity wake-up channel that turns on the display when the user's hand approaches, extending battery life on portable products. Configurable sensitivity lets the same BOM serve products with different overlay thicknesses. The UQFN-20 (4x4 mm) package fits inside small product enclosures and supports standard reflow profiles, enabling high-volume surface-mount assembly without specialty tooling.
Recommended
Medical and Wellness Device Front Panels
Medical and wellness devices (blood pressure monitors, glucose meters, CPAP machines, professional beauty equipment) increasingly use sealed capacitive touch panels for hygiene and cleanability. The MTCH108-I/GZ's 8 channels support the full button set of a typical patient-facing device, and the configurable sensitivity allows operation through thick plastic enclosures and even light medical gloves. The advanced noise-suppression algorithm rejects interference from switched-mode power supplies, fluorescent lighting and RF energy used by adjacent wireless modules. Operating range of -40 C to +85 C supports clinical and home-health environments, while the small UQFN-20 footprint enables compact, lightweight handheld product form factors.
Recommended
Recommended Products Summary
Engineering reference data for MTCH108-I/GZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MTCH108T-I/GZ | MTCH108-I/SS |
|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-UQFN (4x4 mm) | 20-UQFN (4x4 mm) - same | 20-SSOP - different (pin-compatible electrical spec) |
| Number of Channels | 8 | 8 | 8 |
| Number of Digital Outputs | 8 | 8 | 8 |
| Sensitivity Configuration | Configurable per channel | Configurable per channel | Configurable per channel |
| Power Mode | Configurable (active / standby) | Configurable (active / standby) | Configurable (active / standby) |
| Noise Suppression | Advanced optimization algorithm | Advanced optimization algorithm | Advanced optimization algorithm |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Packaging Variant | Tube / cut-tape (GZ suffix) | Tape and reel (T suffix) | Same die, SSOP package |
Key Differentiators
- 8 channels with active noise-suppression algorithm in a compact 4x4 mm UQFN (vs MTCH102-I/MS (2-channel, 8-pin MSOP))
- Same die offered in multiple packages for design flexibility (vs MTCH108-I/SS (SSOP package))
- Stand-alone operation with no host touch library required (vs TI MSP430 + touch library firmware approach)
Design Notes
Place a 100 nF decoupling capacitor on VDD within 5 mm of the MTCH108-I/GZ power pin, and add a 1 uF bulk capacitor on the supply rail nearby. Use a star-ground topology tying the sensor ground ring, decoupling cap ground, and IC GND pin to a single point so that high-current return paths do not flow under the sensor electrodes — return-path noise is the most common cause of false triggers in capacitive touch designs.
Route each sensor electrode to its corresponding MTCH108-I/GZ SENx pin on the same layer, keeping the trace as short and direct as possible. Surround each electrode with a hatched ground ring (typically 50% fill on a 0.2 mm grid) tied back to GND; this ring sets the baseline capacitance and dramatically improves noise immunity. Avoid routing digital signal traces parallel to and just under sensor electrodes, because capacitive coupling from digital edges can modulate the touch baseline and produce jitter.
Estimated: when designing overlays thicker than 4 mm or when the device is mounted behind metalized plastic, the MTCH108-I/GZ may report reduced sensitivity or no touch at all. Always validate sensitivity with the actual overlay stack-up (including any adhesive layer) before committing to production tooling. If touch fails through a thick overlay, consider increasing the electrode area, switching to a higher-sensitivity MTCH108 variant tuning, or evaluating an active-shield driven overlay rather than a passive approach.
Compliance Information
RoHS and REACH compliant per Microchip product page; the -I suffix indicates industrial -40 C to +85 C temperature grade. The MTCH108-I/GZ is not AEC-Q100 qualified — for automotive interior applications, validate the appropriate automotive-qualified Microchip part number or perform a customer-specific AEC-Q100 characterization.
