MTCH102-I/MS - 2-Channel Capacitive Touch Controller, MSOP-8 | Microchip
N.º de pieza: MTCH102-I/MS ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.18 | $1,18 |
| 10 | $1.05 | $10,50 |
| 100 | $0.89 | $89,00 |
| 500 | $0.76 | $380,00 |
| 1.000 | $0.65 | $650,00 |
MTCH102-I/MS Descripción general
What is a capacitive touch controller? A capacitive touch controller is a semiconductor device that detects changes in capacitance caused by a finger or conductive object approaching or touching a sensor pad. It belongs to the broader hierarchy: capacitive touch controller -> touch/proximity sensor -> sensor IC -> interface IC -> integrated circuit. Unlike resistive touch, capacitive sensing offers higher reliability, multi-touch potential, and immunity to mechanical wear, which is why capacitive touch controllers have largely replaced mechanical switches in consumer and industrial products.
The MTCH102-I/MS features configurable sensitivity and a low-power mode that allows the device to balance noise immunity versus current consumption for each application. The integrated advanced optimization algorithm actively suppresses noise from the signal path, reducing false triggers in environments with switching supplies or RF interference. The device presents simple digital output signals, eliminating the need for host firmware to interpret raw capacitive data.
Typical applications include consumer electronics, industrial control panels, white goods, IoT devices, smart home controls, and any system that needs to convert a mechanical key into a capacitive touch interface. The wide operating temperature range of -40°C to +85°C supports both indoor and outdoor installations.
When designing with this device, place the sensor pads and guard traces correctly, follow the Microchip recommended PCB layout, and add adequate ground flooding around the sensing electrodes to maximize noise immunity. Decoupling capacitors must be placed as close as possible to the VDD pin.
Alternativas directas para MTCH102-I/MS — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MTCH102-I/MS (mismo factor de forma y huella) — difiere en Noise Suppression, Operating Temperature Range, Output Type, Package, Sensitivity Configuration.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MTCH102T-I/MS
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MTCH102-I/MC
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MTCH105-I/MS
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MTCH102-I/MS Especificaciones
| Función | 2-channel capacitive proximity/touch controller |
| Number of Channels | 2 |
| Tipo de interfaz | Simple digital I/O |
| Supply Voltage (VDD) | 2.05 V to 3.6 V |
| Rango de temperatura de funcionamiento | -40°C to +85°C |
| Sensitivity Configuration | Configurable |
| Power Mode | Configurable (normal / low-power) |
| Tipo de salida | Digital open-drain / push-pull active-low |
| Noise Suppression | Advanced optimization algorithm |
| Encapsulado | 8-pin MSOP (0.118", 3.00 mm width) |
| Tipo de montaje | Surface Mount |
| Nivel MSL | 1 (per JEDEC J-STD-020) |
| Estado RoHS | Compliant |
| Lead-Free | Yes |
| Sensing Technology | Capacitive |
Configuración de pines de MTCH102-I/MS
| Pin 1 | VDD — Supply voltage input (2.05 V to 3.6 V) |
| Pin 2 | OUT1 — Channel 1 digital touch/proximity output |
| Pin 3 | SENS1 — Channel 1 sensitivity configuration |
| Pin 4 | GND — Ground |
| Pin 5 | SENS2 — Channel 2 sensitivity configuration |
| Pin 6 | OUT2 — Channel 2 digital touch/proximity output |
| Pin 7 | MODE — Power mode selection (normal / low-power) |
| Pin 8 | NC — Not connected (per datasheet) |
Aplicaciones típicas
MTCH102-I/MS es adecuado para 6 aplicacións: Consumer Electronics Touch Buttons, Industrial Control Panel Proximity Sensing, Smart Home Lighting Controls, Wearable and Battery-Powered Devices, White Goods and Appliance Interfaces, IoT Sensor Node User Input.
Consumer Electronics Touch Buttons
The MTCH102-I/MS fits consumer touch-button replacement because its 2-channel capacitive sensing, configurable sensitivity, and integrated advanced noise-suppression algorithm let designers drop in a flat touch interface in place of mechanical keys without writing complex host-side capacitive firmware. Operating from 2.05 V to 3.6 V it pairs directly with 3.3 V MCUs; the 8-MSOP package suits thin handheld enclosures. Unlike a discrete RC-based design, the MTCH102-I/MS provides pre-qualified touch hysteresis and noise immunity, reducing false-trigger rates by an order of magnitude in proximity to switching supplies.
Recomendado
Industrial Control Panel Proximity Sensing
The MTCH102-I/MS fits industrial panel proximity sensing because its 2 channels support behind-glass detection and its -40°C to +85°C industrial operating range tolerates factory-floor temperatures. The integrated noise-suppression algorithm actively rejects EMI from VFD drives and switching converters typical in industrial cabinets, while configurable sensitivity lets the same part detect finger touch through 5 mm acrylic or hand proximity through 50 mm air gap without firmware tuning.
Recomendado
Smart Home Lighting Controls
The MTCH102-I/MS fits smart-home touch dimmers because the 2-channel output lets one channel select brightness step while the other toggles on/off, replacing two mechanical switches with a single sealed capacitive interface. Operating from 2.05 V to 3.6 V with configurable low-power mode, the device enables always-on wall-switch designs running from a small AC-derived bias supply; the 8-MSOP form factor is small enough for behind-the-wall retrofit modules.
Recomendado
Wearable and Battery-Powered Devices
The MTCH102-I/MS fits wearables because its 2.05 V to 3.6 V supply range and configurable low-power mode allow continuous proximity detection from a single coin-cell or Li-ion battery. Each channel can be polled infrequently for wake-on-touch behaviour, drawing minimal quiescent current between events. The 8-MSOP package occupies ~9.6 mm² of PCB area, leaving room for batteries and antennas in wrist-worn form factors.
Recomendado
White Goods and Appliance Interfaces
The MTCH102-I/MS fits white-goods interfaces because its sealed capacitive touch replaces membrane keypads that fail from moisture and mechanical wear. The advanced noise-suppression algorithm tolerates the high dV/dt noise from universal-motor and inverter compressor drives inside washing machines, refrigerators, and microwaves. With 2 channels the device handles a single on/off plus child-lock combination in a slim 8-MSOP package suited to behind-glass control panels.
Recomendado
IoT Sensor Node User Input
The MTCH102-I/MS fits IoT sensor nodes because the 2-channel capacitive interface provides wake-up and mode-select inputs without mechanical buttons that compromise IP-rated enclosures. Operating from 2.05 V to 3.6 V, the device pairs with battery-powered hosts running LoRa, BLE, or sub-GHz radios. Each touch can wake the host MCU from deep sleep, extending battery life by avoiding unnecessary timer-based wakeups.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MTCH102-I/MS — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MTCH102T-I/MS | MTCH102-I/MC | MTCH105-I/MS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 8-MSOP | 8-MSOP - same | 8-MSOP - same | 8-MSOP - same |
| Number of Channels | 2 | 2 | 2 | 5 |
| Supply Voltage | 2.05 V to 3.6 V | 2.05 V to 3.6 V | 2.05 V to 3.6 V | 2.05 V to 3.6 V |
| Interface Type | Simple digital I/O | Simple digital I/O | Simple digital I/O | Simple digital I/O |
| Sensitivity Configuration | Configurable | Configurable | Configurable | Configurable |
| Low-Power Mode | Yes (configurable) | Yes | Yes | Yes |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Diferenciadores clave
- Two-channel touch controller with built-in noise-suppression algorithm (frente a MTCH105-I/MS)
- 8-MSOP small-footprint package (frente a MTCH102-I/MC)
- Wide industrial temperature range with simple digital outputs (frente a Generic capacitive touch ICs requiring host-side capacitive firmware)
Notas de diseño
Place a 0.1 µF decoupling capacitor as close as possible to the VDD pin (pin 1) with a short, wide trace to GND. The MTCH102's sensitivity to high-frequency noise requires minimal inductance on the supply path; use a ground plane on the layer directly beneath the IC and flood the area around the sensor pads with the same ground pour to maximize immunity to conducted and radiated EMI.
Sensor pad geometry directly affects sensitivity: use a pad area of 5 mm × 5 mm to 15 mm × 15 mm for finger touch, and route the connection trace on the opposite side of the ground pour with a minimum trace-to-ground clearance of 0.5 mm. A guard trace around the sensor pad (driven by GND or a shield signal) significantly improves proximity-mode detection range and reduces false triggers from water droplets.
Do not route high-speed digital or switching-power traces directly alongside the sensor traces, as capacitive coupling can inject noise that mimics touch events. According to Microchip application notes, a minimum 2 mm clearance to switching signals is recommended, and where crossings are unavoidable, route them perpendicular on adjacent layers only. Avoid running sensor traces over ground-plane splits, which can detune sensitivity.
Información de cumplimiento
RoHS compliant per distributor data. Industrial-grade (-40°C to +85°C); not AEC-Q100 qualified - automotive HMI requires an AEC-Q100 part instead.
