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Microchip Technology MTCH108T-I/SS
- Part No.:
- MTCH108T-I/SS
- Manufacturer:
- Microchip Technology
- Category:
- Sensor, Capacitive Touch
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MTCH108T-I/SS.pdf
- Description:
- IC PROXIMITY DETECTOR 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,399
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Product details
Overview
MTCH108T-I/SS from Microchip Technology is an 8-channel capacitive proximity and touch controller with active guarding, operating from 2.05V to 3.6V over –40°C to +85°C, delivering configurable sensitivity via MTSA and low-power mode control via MTPM for embedded human-interface applications such as appliance control panels and display activation.
For engineers reviewing the MTCH108T-I/SS datasheet, MTCH108T-I/SS pinout, MTCH108T-I/SS application, or MTCH108T-I/SS equivalent, this device offers verified 8-sensor channel support, active guard capability on MTI2, open-drain digital outputs (MTO0–MTO7), and noise-suppressed detection suitable for high-reliability consumer and industrial touch interfaces.
Technical Context
The MTCH108T-I/SS implements a dedicated capacitive sensing engine with multi-stage active noise suppression filters and automatic environmental compensation, enabling robust operation in electrically noisy environments. It supports flexible sensor geometry and size through adjustable sensitivity and active guard drive synchronized to sensor inputs.
Its digital interface uses eight independent open-drain outputs (MTO0–MTO7), each corresponding to one of eight sensor inputs (MTI0–MTI7), with MTI2 configurable as active guard output. Power management is controlled by MTPM, selecting between fast-response normal mode (MTPM = VDD) and slower, lower-current low-power mode (MTPM = GND).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 8 independent capacitive sensor inputs (MTI0–MTI7) |
| Active Guard | Configurable on MTI2 pin; reduces noise coupling from adjacent traces or power planes |
| Output Type | 8 open-drain digital outputs (MTO0–MTO7); each pulls low on detection |
| Supply Voltage | 2.05V to 3.6V; supports single-cell Li-ion and 3.3V system rails |
| Operating Temp | –40°C to +85°C; qualified for industrial and white-goods environments |
| Sensitivity Control | Analog-adjustable via MTSA pin (0–VDD); linear voltage-to-sensitivity mapping |
| Low-Power Mode | Enabled by grounding MTPM; reduces current draw at cost of slower scan rate |
Pinout & Package
MTCH108T-I/SS is housed in a 20-lead SSOP (Shrink Small Outline Package) with 0.65 mm pitch, optimized for compact PCB layouts while maintaining hand-solderability and thermal performance in surface-mount assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.05–3.6V supply rail; requires local decoupling capacitor |
| VSS | Ground reference | System ground return; must be low-impedance connection to minimize noise |
| MTI0–MTI7 | Capacitive sensor inputs | Each connects to a dedicated electrode; ≥4.7 kΩ series resistor recommended for EMI immunity |
| MTO0–MTO7 | Digital detect outputs | Open-drain active-low outputs; require external pull-up resistors to host logic rail |
| MTI2/Guard | Guard-capable sensor input | Can drive active guard waveform in-phase with MTI2 to shield against noise coupling |
| MTO2/GC | Guard control output | Drives guard signal when GC is grounded; enables active guarding on MTI2 |
| MTSA | Sensitivity adjust input | Analog voltage input (0–VDD) sets global sensitivity; linear response curve |
| MTPM | Low-power mode select | Logic-high (VDD) = normal mode; logic-low (GND) = reduced current, slower response |
Key Features
| Feature | Design Value |
|---|---|
| Multi-stage active noise suppression | Real-time filtering across frequency bands improves SNR in EMI-prone environments like motor-driven appliances |
| Automatic environmental compensation | Self-adjusts baseline capacitance tracking to maintain stable detection under humidity or temperature drift |
| Configurable active guard | MTI2/Guard + MTO2/GC pair enables physical shielding of sensitive sensor traces without external circuitry |
| Smart scan scheduling | Optimizes channel scanning order and timing to minimize cross-talk and maximize throughput per power cycle |
| Threshold hysteresis | Prevents false toggling near detection threshold by enforcing distinct on/off voltage margins |
Applications
| Light Switch Interface | Appliance Control Panel |
|---|---|
|
Use Scenario: Wall-mounted capacitive light switch replacing mechanical toggle, requiring reliable detection through glass or plastic overlay. IC Role / Device Role / Timing Role: Proximity/touch controller managing 8 independent zones for multi-button or slider-based lighting control. Use Value: MTCH108T-I/SS delivers consistent detection through 5 mm acrylic overlay with built-in active guard suppressing noise from nearby AC wiring. |
Use Scenario: Touch-sensitive control panel on refrigerator or oven with moisture, condensation, and EMI from compressors or heating elements. IC Role / Device Role / Timing Role: Primary capacitive interface IC handling up to 8 user-accessible controls (e.g., temp, mode, timer) with environmental adaptation. Use Value: MTCH108T-I/SS maintains stable operation across –40°C to +85°C and suppresses motor-induced noise using multi-stage filtering and guard drive. |
| Display Backlight Activation | Office Equipment UI |
|
Use Scenario: Touch-to-wake function on industrial HMI display, activating backlight only when user approaches within 3 cm. IC Role / Device Role / Timing Role: Proximity-only detector using 2–3 channels for zone-based wake-up; remaining channels reserved for touch confirmation. Use Value: MTCH108T-I/SS enables ultra-low standby current in low-power mode while retaining fast wake-up latency via configurable MTPM behavior. |
Use Scenario: Touch-enabled copier or multifunction printer control panel with button, slider, and proximity wake functions. IC Role / Device Role / Timing Role: Single-chip solution for all capacitive inputs-8 discrete buttons plus active guard on critical zones near power supplies. Use Value: MTCH108T-I/SS eliminates need for multiple controllers or external guard drivers, reducing BOM count and layout complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive proximity and touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MTCH105T-I/SS | 5-channel version; same SSOP package, identical pinout for first 14 pins; lacks MTI6/MTI7 and MTO6/MTO7 | Suitable for designs needing ≤5 sensors; not scalable to 8-zone interfaces without redesign | Select when BOM cost reduction is prioritized and full 8-channel capability is unnecessary |
| CY8CMBR2016A-DSI | 16-channel CapSense® controller from Infineon; I²C interface; no native active guard; higher integration with firmware configurability | Requires host MCU for configuration and calibration; better suited for programmable UIs than fixed-function systems | Choose when design flexibility and post-deployment tuning outweigh simplicity and deterministic timing of MTCH108T-I/SS |
Compared with MTCH105T-I/SS, the MTCH108T-I/SS provides two additional sensor channels and guard-capable MTI2 routing, enabling larger touch surfaces without added components; versus CY8CMBR2016A-DSI, it offers simpler integration, lower latency, and hardware-based noise rejection without firmware dependency.
Availability
MTCH108T-I/SS is available at Aetrix Electronics and suitable for white goods, office equipment, and display interface applications requiring stable component supply, long-term industrial availability, and RoHS-compliant packaging.
Supply support for MTCH108T-I/SS includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and interface ICs, headquartered in Chandler, Arizona, with global design and manufacturing operations certified to ISO/TS-16949.
The MTCH108T-I/SS belongs to Microchip's mTouch® family of dedicated capacitive controllers, designed specifically for cost-sensitive, high-reliability human-interface applications where minimal MCU intervention and deterministic response are required.
FAQ
What is the package type and lead count for MTCH108T-I/SS?
The MTCH108T-I/SS is supplied in a 20-lead Shrink Small Outline Package (SSOP) with 0.65 mm lead pitch. This package is explicitly listed in Table 2 of the DS40001780A datasheet for the MTCH108 family and matches the 20-pin TSSOP pinout described in Table 5, confirming pin compatibility and mechanical fit for standard SSOP footprints.
Does MTCH108T-I/SS support active guarding, and on which pin?
Yes, MTCH108T-I/SS supports active guarding on the MTI2 pin, designated as "MTI2/Guard" in the pin description. When the MTO2/GC pin is grounded, the device drives the guard waveform in-phase with MTI2 to reduce capacitive coupling from adjacent noise sources - a capability confirmed in Figure 5, Table 5, and the PIN DESCRIPTION section of DS40001780A.
How many independent touch/proximity channels does MTCH108T-I/SS provide?
The MTCH108T-I/SS provides exactly eight independent capacitive sensing channels, mapped to inputs MTI0 through MTI7. This is unambiguously stated in TABLE 1 (Device column "MTCH108", Sensor Input "8(1)") and fully detailed in Table 5, which lists all eight inputs and their corresponding open-drain outputs MTO0–MTO7.
What is the function of the MTSA pin on MTCH108T-I/SS?
The MTSA pin on MTCH108T-I/SS is an analog sensitivity adjustment input. Applying a voltage between GND and VDD sets detection sensitivity linearly: GND yields maximum sensitivity, VDD yields minimum. This behavior is documented in the PIN DESCRIPTION section and confirmed in Figure 6's system diagram and functional description of the MTCH10X family.
Can MTCH108T-I/SS operate from a 3.3V supply, and what is its full voltage range?
Yes, MTCH108T-I/SS operates across 2.05V to 3.6V, fully covering standard 3.3V logic rails. This supply range is specified in the Description section (page 1), reiterated in the Electrical Characteristics summary (implied by "Operating Voltage Range"), and validated by design examples using 3.3V in typical application schematics throughout DS40001780A.
MTCH108T-I/SS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Buttons
- Proximity Detection:
- Yes
- Number of Inputs:
- Up to 8
- LED Driver Channels:
- Up to 8
- Interface:
- Open Drain
- Resolution:
- -
- Voltage - Supply:
- 2.05V ~ 3.6V
- Current - Supply:
- 80mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
MTCH108T-I/SS FAQ
1.How can I place an order for MTCH108T-I/SS through Aetrix?
Please submit a Request for Quotation (RFQ) for MTCH108T-I/SS on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MTCH108T-I/SS reliable?
The price and inventory of MTCH108T-I/SS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MTCH108T-I/SS is usually 5 days.
3.What payment methods are accepted for MTCH108T-I/SS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MTCH108T-I/SS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MTCH108T-I/SS?
MTCH108T-I/SS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MTCH108T-I/SS order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MTCH108T-I/SS?
For technical support, including MTCH108T-I/SS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MTCH108T-I/SS requirements.
6.How does Aetrix verify that MTCH108T-I/SS is sourced from the original manufacturer or authorized distributors?
All MTCH108T-I/SS products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MTCH108T-I/SS meets industry standards.
7.What is the process for return or replacement of MTCH108T-I/SS?
All MTCH108T-I/SS units undergo pre-shipment inspection (PSI). If there is an issue with MTCH108T-I/SS, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MTCH108T-I/SS part is unused and in its original packaging.
Return procedure for MTCH108T-I/SS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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