MTCH102T-I/MU - 2-Ch Capacitive Touch/Proximity Controller | Microchip
Teilenummer: MTCH102T-I/MU ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.62 | $1,62 |
| 10 | $1.46 | $14,60 |
| 100 | $1.2 | $120,00 |
| 500 | $1.02 | $510,00 |
| 1.000 | $0.85 | $850,00 |
MTCH102T-I/MU Übersicht
A capacitive proximity/touch controller is a mixed-signal IC that measures changes in the electric charge of an electrode when a conductive object (typically a human finger) approaches or contacts the sensor pad. This category sits within the broader sensor and human-interface IC hierarchy: capacitive touch controller -> proximity sensor -> touch sensor -> human-interface IC -> sensor IC -> semiconductor. The MTCH102 specifically targets designs that need simple on/off touch replacement of mechanical buttons or proximity wake-up without the complexity of a full capacitive-touch library.
Key differentiating features include 2 independent sensor channels, configurable sensitivity via external components, an integrated noise-suppression algorithm (per Microchip MTCH102 product brief), low quiescent current suitable for battery applications, and direct GPIO-compatible digital outputs that require no I2C/SPI host communication. The compact 8-UDFN (3x3 mm) package enables placement in space-constrained enclosures such as wearable bands, appliance front panels, and IoT sensor nodes.
Architecturally, the MTCH102 implements a charge-transfer-based measurement engine with on-chip signal conditioning, calibration, and digital debounce. According to the MTCH102/105/108 datasheet brief, the device uses an "advanced optimization algorithm to actively suppress noise from the signal," allowing reliable touch detection even in the presence of mains hum, LCD drive noise, or charger-induced interference common in appliance and industrial HMI environments.
Typical applications include white-good control panels replacing mechanical buttons, door-lock proximity wake-up, wearable touch interfaces, IoT device user inputs, automotive interior lighting touch, and battery-powered remote controls. Its simple on/off output reduces firmware overhead vs. capacitive-touch parts with multi-touch protocol stacks.
When designing with this part, follow Microchip layout guidelines: keep the sensor trace short, use a guard ring around each electrode, and add a series resistor close to the chip pin. Avoid routing the sensor trace near switching power or high-frequency signal lines to prevent false triggers, even with the on-chip noise suppression.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes for the MTCH102T-I/MU not found in the manufacturer datasheet alone.
Drop-in-Alternativen für MTCH102T-I/MU – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MTCH102T-I/MU (gleiche Bauform und Footprint) – abweichend in Noise Suppression, Operating Temperature Range, Output Type, Package, Sensitivity Configuration.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MTCH102T-I/MU
✅ Drop-In✓ Auf Lager
$0.85 / Stück
Datenblatt ansehen →MTCH102-I/MS
✅ Drop-In✓ Auf Lager
$0.65 / Stück
Datenblatt ansehen →MTCH105T-I/MU
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MTCH108T-I/MU
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MTCH102T-I/MU Grenzwerte & elektrische Eigenschaften
| Product Type | Capacitive Proximity/Touch Controller |
| Number of Channels | 2 |
| Ausgangstyp | Digital (active HIGH/LOW per channel) |
| Sensor Technology | Capacitive (charge-transfer based) |
| Sensitivity Configuration | External component adjustment |
| Noise Suppression | On-chip advanced optimization algorithm |
| Host Interface | GPIO (no I2C/SPI required) |
| Gehäuse | 8-pin UDFN, 3x3 mm |
| Betriebstemperaturbereich | -40C to +85C (industrial, per -I suffix) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Pin-Anzahl | 8 |
| Family | MTCH102/105/108 (2/5/8-channel variants) |
MTCH102T-I/MU Pin-Konfiguration
| Pin 1 | OUT1 — Channel 1 digital output (active HIGH on touch) |
| Pin 2 | VDD — Positive supply voltage |
| Pin 3 | GND — Ground reference |
| Pin 4 | SENSE1 — Channel 1 sensor electrode input |
| Pin 5 | SENSE2 — Channel 2 sensor electrode input |
| Pin 6 | OUT2 — Channel 2 digital output (active HIGH on touch) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | NC — Not connected (per datasheet) |
Typische Anwendungen
MTCH102T-I/MU ist geeignet für 7 Anwendungs: White-Goods Appliance Control Panels, Wearable Touch User Interface, Smart Door-Lock Proximity Wake-Up, Industrial HMI Front Panels, IoT Sensor Node User Input, Automotive Interior Lighting Touch, Battery-Powered Remote Control Buttons.
White-Goods Appliance Control Panels
The MTCH102T-I/MU is ideal for replacing mechanical push-buttons on washing machines, dishwashers, ovens, and microwaves where mains-derived EMI and motor-drive noise would otherwise confuse simple touch circuits. Its on-chip advanced noise-suppression algorithm (per Microchip MTCH102/105/108 brief) actively filters mains-frequency interference, allowing reliable touch detection even when the sensor trace is routed near the motor-driver PCB section. The 2-channel output directly drives a host MCU GPIO or comparator input, requiring zero touch firmware on the appliance controller. The 8-UDFN (3x3 mm) package fits within the tightly-spaced control-panel PCB behind glass overlays.
Empfohlen
Wearable Touch User Interface
Battery-powered wearables such as fitness bands, smart watches, and hearables benefit from the MTCH102T-I/MU's ultra-low-power operating mode and minimal host-MCU processing load. According to the MTCH102 product brief, the device can wake the host MCU only on a touch event, keeping the host in deep sleep most of the time to maximize battery life. Two channels support common UI patterns (e.g., tap-to-wake plus a side button), and the 3x3 mm UDFN package fits inside wristbands with < 30 mm circumference. Direct GPIO output eliminates the need for an I2C touch controller in the BOM, reducing both cost and standby drain.
Empfohlen
Smart Door-Lock Proximity Wake-Up
Smart locks use capacitive proximity to detect a hand approaching the keypad and wake the system from sleep before the user touches a button. The MTCH102T-I/MU's 2-channel architecture supports one proximity zone and one mechanical-touch confirmation button, both handled by the same chip without an extra MCU. The on-chip noise suppression rejects RF interference from the lock's wireless radio (Wi-Fi, BLE, or Zigbee), preventing false proximity triggers. The industrial -40C to +85C temperature rating ensures operation across outdoor door installations from winter to summer extremes.
Empfohlen
Industrial HMI Front Panels
Industrial HMIs in PLC-Programmable VFD cabinets, machine tool controls, and process-control panels require robust touch input that survives factory-floor EMI from VFD drives, contactors, and welding equipment. The MTCH102T-I/MU's advanced noise-suppression algorithm was specifically designed for these high-noise environments per Microchip's MTCH102 family brief, allowing reliable detection when sensor traces run near high-current motor lines. Two channels support start/stop or up/down buttons, the most common industrial HMI control patterns. The -40C to +85C industrial temperature range covers factory-floor and outdoor cabinet requirements.
Empfohlen
IoT Sensor Node User Input
Battery-powered IoT sensor nodes (smart thermostats, environment monitors, smart lighting controls) need a low-cost, low-power touch interface that does not require an always-on host MCU. The MTCH102T-I/MU's digital output directly wakes the host MCU only when a user touches the sensor, keeping the host in deep sleep most of the time. Two channels support thermostat up/down temperature adjust or light on/off dim controls. According to the MTCH102 datasheet brief, the device's configurable sensitivity supports both direct-touch (acrylic overlay) and proximity (5-10 cm) sensing, enabling contactless product designs.
Empfohlen
Automotive Interior Lighting Touch
Automotive interior lighting (dome lights, footwell LEDs, ambient strip controls) increasingly uses capacitive touch to achieve a seamless button-less look. The MTCH102T-I/MU's 2 channels support on/off and brightness-up functions for interior lighting zones. The on-chip noise suppression rejects ignition-system and motor-driver noise common in 12V automotive electrical environments. Note that the standard MTCH102T-I/MU is NOT AEC-Q100 qualified - for AEC-Q100-qualified capacitive touch in automotive applications, consider Microchip's AT42QT1010-AT or automotive-grade alternatives. Verify with Microchip's automotive touch portfolio before designing in.
Empfohlen
Battery-Powered Remote Control Buttons
TV remotes, presentation clickers, and small battery-powered remote controls benefit from the MTCH102T-I/MU's ultra-low quiescent current and simple GPIO output. Two channels handle volume up/down or play/pause with no firmware touch-stack overhead. The 3x3 mm UDFN package fits within the slim enclosure typical of modern clicker designs. The on-chip noise suppression rejects noise from the IR LED, RF transmitter, and other on-board switching circuits, preventing false channel triggers that would drain the battery. Pair with a PIC16F or ATtiny MCU for a complete ultra-low-power remote design.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MTCH102T-I/MU – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MTCH102T-I/MU | MTCH102-I/MS | MTCH105T-I/MU | MTCH108T-I/MU |
|---|---|---|---|---|---|
| Package | 8-UDFN (3x3 mm) | 8-UDFN (3x3 mm) - same | MSOP-8 - different | 10-MSOP - different | 16-QFN - different |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Number of Channels | 2 | 2 | 2 | 5 | 8 |
| Output Type | Digital GPIO | Digital GPIO | Digital GPIO | Digital GPIO | Digital GPIO |
| Noise Suppression Algorithm | Yes (advanced) | Yes (advanced) | Yes (advanced) | Yes (advanced) | Yes (advanced) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Industrial Grade (-I suffix) | Yes | Yes | Yes | Yes | Yes |
| Family | MTCH102 (2-ch) | MTCH102 (2-ch) | MTCH102 (2-ch) | MTCH105 (5-ch) | MTCH108 (8-ch) |
Wichtigste Unterscheidungsmerkmale
- Only 2-channel capacitive touch IC in the MTCH10x family in 8-UDFN (3x3 mm) (vs. MTCH105T-I/MU)
- On-chip advanced noise-suppression algorithm (Microchip proprietary) (vs. Discrete touch-sensing circuits)
- GPIO-level digital output (no host MCU or firmware touch-stack required) (vs. I2C/SPI capacitive touch controllers (e.g., FDC1004))
Designhinweise
Sensor PCB layout is the single biggest determinant of touch reliability. Per the MTCH102/105/108 datasheet, route the SENSE1 and SENSE2 traces as short as possible (typically < 30 mm), use a guard ring (ground trace) around each electrode, and avoid routing sensor traces near switching power, motor driver, or RF traces. Add a small series resistor (typically 1 kohm to 10 kohm, value per datasheet) close to each SENSE pin to attenuate ESD and high-frequency noise coupling into the chip. Keep the ground plane solid under and around the sensor area, with the UDFN exposed pad soldered to ground for thermal and noise performance.
Do not assume the MTCH102T-I/MU is AEC-Q100 qualified - the standard part is industrial-grade (-40C to +85C). For automotive interior applications requiring this qualification, choose a dedicated automotive capacitive touch part such as the AT42QT1010-AT (AEC-Q100). Also note that the MTCH102 is NOT drop-in pin-compatible with the MTCH105 or MTCH108 even within the same family - they use different packages (8-UDFN vs 10-MSOP vs 16-QFN). When the design requires more channels, redesign the PCB; do not attempt to mount an MTCH105 on an MTCH102 footprint. Sensitivity adjustment is done via external components - consult the datasheet for the recommended capacitor and resistor values.
The MTCH102T-I/MU's digital output is a logic-level HIGH/LOW signal that can be polled by any MCU GPIO. The output is typically push-pull (per the MTCH102/105/108 brief), so no external pull-up or pull-down resistor is required. However, if the SENSE input is left floating (no electrode connected), the OUT signal may toggle - tie the unused SENSE pin to ground through a resistor per the datasheet to prevent false channel triggers. The on-chip advanced optimization algorithm handles most EMI scenarios, but for extreme industrial environments (VFD drives, welding equipment), consider adding an RC filter on the SENSE trace and increasing the guard-ring spacing around the electrode.
Estimated: The MTCH102T-I/MU's quiescent current is in the low-microampere range based on Microchip's MTCH102 product brief describing 'ultra-low-power operating mode.' For battery-powered designs (e.g., IoT sensors, wearables), pair the MTCH102T-I/MU with a host MCU that supports deep sleep with GPIO wake-up so that the host MCU remains asleep most of the time and only wakes when the MTCH102T-I/MU asserts an OUT signal. Verify exact IQ and active-current values in the MTCH102/105/108 datasheet DS40002365 before finalizing battery-life calculations. Add a 100 nF decoupling capacitor close to VDD (pin 2) and a 1 uF to 10 uF bulk capacitor on the supply rail.
Compliance-Informationen
RoHS compliant per Microchip product page. Industrial -40C to +85C (-I suffix) but NOT AEC-Q100 qualified - for automotive use, choose AEC-Q100 qualified capacitive touch ICs. Halogen-free status not explicitly stated in retrieved data.
