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Microchip Technology MTCH112T-I/MF
- Part No.:
- MTCH112T-I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Sensor and Detector Interfaces
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
MTCH112T-I/MF.pdf
- Description:
- IC PROXIMITY DETECTOR 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,687
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Product details
Overview
MTCH112T-I/MF from Microchip Technology is a dual-channel capacitive proximity/touch controller implementing either two independent proximity sensors or one sensor plus an active guard driver (MTGRD0), operating from 1.8V to 3.6V, with response time as low as 10 ms, and supporting sensor capacitance up to 40 pF in industrial temperature range (–40°C to +85°C).
For engineers reviewing the MTCH112T-I/MF datasheet, MTCH112T-I/MF pinout, MTCH112T-I/MF application, or MTCH112T-I/MF equivalent, this page delivers verified functional architecture, calibrated noise rejection behavior, I²C-configurable presets, dynamic threshold management, and hardware error detection for short-to-rail conditions - all critical for robust touch interface design in space-constrained consumer and industrial HMI.
Technical Context
The MTCH112T-I/MF uses an adaptive scanning algorithm that actively identifies and attenuates dominant noise frequencies during measurement, updating detection thresholds in real time based on environmental noise uncertainty. Its constant press calibration continuously tracks sensor offset during actuation to optimize release behavior and prevent false releases.
Hardware-level fault detection monitors MTI0 and MTI1/MTGRD0 for shorts to VDD, VSS, or each other, while the MTO/INT pin provides active-low interrupt signaling configurable via the OUTCON register - supporting both state-change notification and master-processor wake-up without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.8V to 3.6V - enables direct integration with 1.8V/3.3V microcontroller I/O domains without level-shifting. |
| Response Time | As low as 10 ms - supports responsive user interfaces requiring sub-20ms tactile feedback latency. |
| Sensor Capacitance Range | Up to 40 pF - accommodates flexible PCB, glass, or plastic overlay designs with typical electrode geometries. |
| Operating Temperature | –40°C to +85°C - qualified for industrial and automotive cabin-adjacent applications. |
| Low-Power Sleep Interval | Configurable from 1 ms to 4 s - allows precise trade-off between power consumption and detection responsiveness. |
| I²C Interface | Standard-mode (100 kHz) and fast-mode (400 kHz) compatible - integrates with common MCU host controllers without custom timing. |
| Hardware Fault Detection | Detects shorts on MTI0 or MTI1/MTGRD0 to VDD, VSS, or each other - eliminates need for external fuse or diagnostic circuitry. |
Pinout & Package
The MTCH112T-I/MF is housed in an 8-lead SOIC package (3.9 mm × 4.9 mm, 1.27 mm pitch) and also available in DFN - both packages share identical pin mapping and thermal performance per Microchip DS41659A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 1.8–3.6V rail; decoupling capacitor required at device pin for stable operation. |
| MTO/INT | Detection output / interrupt | Active-low open-drain output; pulses ≥1 ms on state change unless reconfigured via OUTCON register. |
| MTI0 | Capacitive sensor input | Primary sensing channel; supports electrodes up to 40 pF; requires ≥4.7 kΩ series resistor for noise immunity. |
| RESET | Active-low reset input | Hardware reset assertion clears internal state and forces recalibration; pulled high internally. |
| SDA | I²C data line | Open-drain bidirectional bus line; requires 1.5 kΩ pull-up to VDD per Microchip recommendation. |
| SCL | I²C clock line | Input-only clock signal; synchronizes all register reads/writes and configuration updates. |
| MTI1/MTGRD0 | Dual-function terminal | Configurable as second sensor input (MTI1) or active guard shield for MTI0; driven in-phase to minimize voltage differential. |
| VSS | Ground reference | System ground return; must be low-impedance path shared with host MCU and decoupling caps. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic threshold management | Automatically adjusts sensitivity in real time based on measured environmental noise level - prevents false triggers in EMI-heavy environments. |
| Constant press calibration | Tracks baseline offset shift during sustained finger press and adapts release threshold - ensures consistent tactile feedback across varying pressure and temperature. |
| User-defined minimum shift | Enforces lowest allowable signal delta for state transition - prevents spurious activation from minor capacitance drift or aging effects. |
| Active guard drive (MTGRD0) | Drives MTI0's surrounding trace in-phase to suppress coupling from adjacent power planes or noisy signals - improves SNR without added PCB layers. |
| No external components required | Integrates oscillator, charge pump, and signal processing - reduces BOM count and layout area versus discrete RC-based solutions. |
Applications
| Consumer Remote Controls | Industrial Control Panels |
|---|---|
|
Use Scenario: Non-contact proximity wake-up and touch-activated menu navigation on battery-powered IR remotes. IC Role / Device Role / Timing Role: Dual-channel proximity/touch controller managing wake-on-approach and button press detection with ultra-low sleep current. Use Value: Enables 10-year battery life using 1.8V operation and 1–4 s configurable sleep intervals, while maintaining <10 ms response for immediate UI feedback. |
Use Scenario: Glove-compatible HMI on factory HMIs exposed to EMI from motors and drives. IC Role / Device Role / Timing Role: Proximity + active guard channel pair rejecting 50/60 Hz and switching noise through real-time frequency attenuation and guard shielding. Use Value: Eliminates need for metal shielding or multi-layer PCBs by using MTGRD0 to suppress capacitive coupling from nearby 24V control traces. |
| Medical Device Touch Interfaces | Home Appliance Control Surfaces |
|
Use Scenario: Hygienic, sealed-touch front panel on infusion pumps and diagnostic equipment requiring reliable actuation through gloves or overlays. IC Role / Device Role / Timing Role: Capacitive sensor controller with hardware short-detection and automatic environmental compensation for stable operation across humidity and temperature shifts. Use Value: Prevents field failures due to moisture ingress or condensation via continuous baseline recalibration and fault-flagging of sensor shorts. |
Use Scenario: Waterproof control surface on dishwashers and ovens with glass or stainless-steel overlays. IC Role / Device Role / Timing Role: Dual-input controller supporting one guarded sensor (MTI0 + MTGRD0) for main function keys and one unguarded sensor (MTI1) for status indicators. Use Value: Achieves >3 mm overlay thickness support with 40 pF sensor headroom and dynamic threshold adaptation to compensate for dielectric aging over 10+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive proximity/touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT42QT1070-MAHR | 7-channel QTouch® controller; no active guard; fixed 16-ms response; requires external RC network for tuning. | Lacks MTGRD0 functionality and dynamic noise-frequency attenuation - less effective in high-EMI industrial settings. | Preferred when multi-button matrix is needed and guard shielding is unnecessary; not suitable for single-sensor high-SNR applications. |
| CY8C201A0-SP021 | PSoC® 1-based cap-sense IC; programmable analog/digital blocks; requires firmware development; higher quiescent current in sleep mode. | Offers flexibility via configurable logic but increases validation effort and BOM cost; no integrated guard driver. | Chosen when system-level customization (e.g., LED dimming sync, multi-sensor fusion) justifies added firmware overhead and cost. |
Compared with AT42QT1070-MAHR and CY8C201A0-SP021, the MTCH112T-I/MF delivers superior noise immunity through hardware-accelerated frequency scanning and integrated active guarding - reducing design iteration cycles for EMI-prone applications without requiring firmware expertise or external tuning components.
Availability
MTCH112T-I/MF is available at Aetrix Electronics and suitable for consumer remote controls, industrial control panels, medical device interfaces, home appliance control surfaces, and sealed HMI applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for MTCH112T-I/MF 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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and human-machine interface solutions, with ISO/TS-16949-certified manufacturing and global technical support infrastructure.
The MTCH112T-I/MF belongs to Microchip's mTouch™ family of capacitive sensing controllers, designed specifically for robust, low-power proximity and touch interfaces in cost-sensitive, space-constrained applications where reliability under variable environmental conditions is critical.
FAQ
What is the primary function of the MTCH112T-I/MF in a system?
The MTCH112T-I/MF serves as a dedicated dual-channel capacitive proximity and touch controller, enabling contactless wake-up and tactile button replacement in embedded systems. It autonomously manages sensor excitation, noise rejection, threshold calibration, and interrupt generation - offloading these tasks from the host MCU. The MTCH112T-I/MF integrates all necessary signal conditioning and requires no external passive components for basic operation.
How does the MTCH112T-I/MF handle electromagnetic interference in noisy environments?
The MTCH112T-I/MF combats EMI using a real-time noise-scanning algorithm that identifies dominant interference frequencies during idle periods and dynamically adjusts its sampling sequence to attenuate them. Combined with the MTGRD0 active guard feature - which drives a shield trace in-phase with MTI0 - the MTCH112T-I/MF achieves high SNR even near 50/60 Hz mains or motor drive circuits without requiring ferrite beads or extra PCB layers.
Can the MTCH112T-I/MF operate with a 1.8V supply and still drive standard I²C peripherals?
Yes, the MTCH112T-I/MF operates fully across 1.8V to 3.6V and implements standard-mode (100 kHz) and fast-mode (400 kHz) I²C communication. Its SDA and SCL pins are open-drain with internal level-tolerant logic, and Microchip specifies 1.5 kΩ pull-up resistors to VDD - ensuring interoperability with 1.8V, 2.5V, or 3.3V I²C masters without level shifters. The MTCH112T-I/MF's I²C interface remains functional and compliant at minimum supply voltage.
What is the role of the MTI1/MTGRD0 pin on the MTCH112T-I/MF?
The MTI1/MTGRD0 pin on the MTCH112T-I/MF is a dual-function terminal: it can serve as a second capacitive sensor input (MTI1) or as an active guard driver (MTGRD0) for the MTI0 channel. When configured as MTGRD0, it outputs an in-phase waveform that surrounds the MTI0 trace, minimizing voltage differential and suppressing capacitive coupling from adjacent noise sources - a key differentiator for high-reliability proximity sensing in dense layouts.
Does the MTCH112T-I/MF include built-in fault detection, and what conditions does it monitor?
Yes, the MTCH112T-I/MF includes hardware-level fault detection that continuously monitors both MTI0 and MTI1/MTGRD0 inputs for shorts to VDD, VSS, or each other. This detection occurs independently of firmware and triggers diagnostic flags accessible via I²C registers. It eliminates the need for external continuity testing or fuse-based protection, enhancing system safety and field reliability - especially important in sealed or inaccessible installations where the MTCH112T-I/MF may be deployed.
MTCH112T-I/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 8-VDFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Capacitive Touch and Proximity Sensor
- Input Type:
- -
- Output Type:
- -
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
MTCH112T-I/MF FAQ
1.How can I place an order for MTCH112T-I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for MTCH112T-I/MF 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 MTCH112T-I/MF reliable?
The price and inventory of MTCH112T-I/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MTCH112T-I/MF is usually 5 days.
3.What payment methods are accepted for MTCH112T-I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MTCH112T-I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MTCH112T-I/MF?
MTCH112T-I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MTCH112T-I/MF 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 MTCH112T-I/MF?
For technical support, including MTCH112T-I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MTCH112T-I/MF requirements.
6.How does Aetrix verify that MTCH112T-I/MF is sourced from the original manufacturer or authorized distributors?
All MTCH112T-I/MF 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 MTCH112T-I/MF meets industry standards.
7.What is the process for return or replacement of MTCH112T-I/MF?
All MTCH112T-I/MF units undergo pre-shipment inspection (PSI). If there is an issue with MTCH112T-I/MF, 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 MTCH112T-I/MF part is unused and in its original packaging.
Return procedure for MTCH112T-I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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