MTCH3380P - 38/64-Sensor Turnkey Capacitive Touch Controller | Microchip
N.º de pieza: MTCH3380P ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.91 | $1,91 |
| 10 | $1.66 | $16,60 |
| 100 | $1.4 | $140,00 |
| 1.000 | $1.18 | $1.180,00 |
| 10.000 | $1.06 | $10.600,00 |
MTCH3380P Descripción general
A capacitive touch controller is an integrated circuit that detects proximity, touch, or gesture events on a capacitive sensor pattern (PCB pad or ITO layer) without requiring a mechanical button or a display. The MTCH3380P belongs to the family of turnkey touch controllers - ICs that handle electrode scanning, charge-transfer acquisition, baseline tracking, filtering, and gesture/firmware decisions internally, so the host MCU is freed from real-time touch processing. Architecturally the device sits below the host processor and above the sensor electrodes in the HMI subsystem: sensors -> charge-transfer front-end -> on-chip ADCs -> digital pipeline -> I2C/SPI/GPIO -> host MCU. Within the broader taxonomy the part is a touch controller -> human-interface device -> mixed-signal IC -> semiconductor.
Key differentiating features include 12 parallel ADCs (vs. sequential scanning on older parts), configurable self/mutual-capacitance modes, support for sliders and wheels in addition to discrete buttons, a low-power operating mode for battery-friendly appliances, and built-in noise-immune algorithms such as frequency hopping and temperature/humidity drift compensation. The part is designed to replace mechanical keypads with sleek glass or plastic overlays and to coexist with displays that have limited touch capability. With this parallel-sensing topology the part maintains touch response time as the sensor count grows - a critical advantage over older sequential-scan controllers that slow down in proportion to channel count.
Typical applications include refrigerator and oven control panels, washing machine and dishwasher HMIs, smart thermostats, smart-speaker top panels, industrial equipment keypads, and outdoor equipment such as weatherproof kiosks. When designing with this device, follow the manufacturer PCB layout guidelines - sensor trace length matching, ground flooding, and ESD/burst protection - to achieve published SNR and moisture tolerance levels.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, and is intended for engineers evaluating parallel-sensing capacitive touch controllers for display-free HMI designs.
Alternativas directas para MTCH3380P — 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 MTCH3380P (mismo factor de forma y huella) — difiere en Package, Slider/Wheel Groups.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MTCH3240P
✅ Sustitución directa✓ En stock
$2.55 / unidad
Ver hoja de datos →MTCH3380P Valores máximos y características eléctricas
| Product Type | Turnkey Capacitive Touch Controller |
| Max Self-Capacitance Sensors | 38 |
| Max Mutual-Capacitance Sensors | 64 |
| Slider/Wheel Groups | 8 |
| On-chip ADCs | 12 (parallel sensing) |
| Acquisition Engine | Microchip charge-transfer, pipelined analog + digital |
| Operating Modes | Self-capacitance, Mutual-capacitance |
| Host Interface | I2C |
| Encapsulado | 56-pin XQFN |
| Tipo de montaje | Surface Mount |
| I/O Supply Voltage | VddIO selectable, per I2C pull-up guidance |
| Compliance | RoHS compliant (per Microchip product page) |
Guía de configuración de pines de MTCH3380P 56-pin xqfn
Configuración de pines para MTCH3380P (encapsulado 56-pin xqfn). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para MTCH3380P.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MTCH3380P es adecuado para 7 aplicacións: Refrigerator and Oven Control Panels, Washing Machine and Dishwasher HMIs, Smart Thermostats, Industrial Equipment Keypads, Smart Speaker Top Panels, Outdoor Weatherproof Kiosks, Kitchen Countertop Appliances.
Refrigerator and Oven Control Panels
The MTCH3380P is well suited to refrigerator and oven control panels that combine 20-40 mechanical-style buttons with sliders for temperature or mode selection. The 38-sensor self-capacitance ceiling and 8 slider/wheel groups cover the largest real-world appliance front panels, while the parallel-sensing topology with 12 on-chip ADCs keeps response time flat as channel count grows - critical when the user expects immediate feedback. Designers place the controller behind a glass overlay, route sensor traces to a 56-pin XQFN footprint on the main PCB, and stream touch events over I2C to the host MCU running the appliance UI.
Recomendado
Washing Machine and Dishwasher HMIs
Washing machines and dishwashers need sealed front panels with 15-30 capacitive buttons plus cycle-selection sliders or rotary wheels. The MTCH3380P's mutual-capacitance mode supports up to 64 sensors, which is ample for top-load washers that expose many program shortcuts, and the parallel ADCs preserve fast acquisition even when all sensors are scanned each cycle. The I2C interface drops cleanly onto a small host MCU that runs the motor-control firmware, and the controller's noise-immunity features tolerate the EMI produced by variable-frequency motor drives.
Recomendado
Smart Thermostats
Smart thermostats typically present a small ring of slider positions or a wheel for temperature setting, plus 4-8 discrete buttons. The MTCH3380P's 8 slider/wheel groups are well matched to a temperature-dial ring, and 38-channel self-capacitance capacity leaves headroom for future UI expansion. The parallel-sensing engine ensures the wheel responds instantly even if the host MCU is busy reading temperature sensors or updating the display, and frequency hopping rejects the mains-frequency interference present on the thermostat's wiring.
Recomendado
Industrial Equipment Keypads
Industrial HMIs often require 20-40 ruggedised buttons behind thick glass or polycarbonate, with high tolerance to water, gloves, and EMI from motor drives. The MTCH3380P's parallel-sensing and frequency-hopping acquisition keep false triggers low under these conditions, and the 56-pin XQFN package is well suited to industrial PCB assembly. Mutual-capacitance mode supports the dense keypad matrices typical of CNC, PLC, and process-control front panels, with each touch event reported to the host over I2C for software debouncing and gesture interpretation.
Recomendado
Smart Speaker Top Panels
Smart speakers use a touch-sensitive top panel for volume control (often a ring or slider) plus a few discrete buttons for mute and power. The MTCH3380P's 8 slider/wheel groups map directly to a volume ring, and the parallel-sensing engine keeps response time consistent when the host is busy streaming audio. The I2C interface connects easily to the speaker's main application processor, and the small XQFN package fits the constrained top-panel PCB layout.
Recomendado
Outdoor Weatherproof Kiosks
Outdoor kiosks for ticketing, parking, or vending must detect touch through thick, weather-sealed overlays and survive rain, temperature swings, and conducted EMI. The MTCH3380P's parallel-sensing topology and on-chip noise-immune algorithms (frequency hopping, temperature/humidity drift compensation) are explicitly designed by Microchip for outdoor HMIs, and the 38-channel self-capacitance capacity supports the medium-density keypads typical of these machines. The 56-pin XQFN package is compatible with conformal-coated PCB assemblies required in outdoor installations.
Kitchen Countertop Appliances
Coffee makers, air fryers, multicookers, and other countertop appliances are transitioning from mechanical buttons to sealed touch panels to simplify cleaning and improve aesthetics. The MTCH3380P's 38-channel self-capacitance capacity supports the 10-25 buttons typical of these products, while the 8 slider/wheel groups enable time or temperature dials. Parallel sensing keeps acquisition time low even when all sensors are scanned, ensuring the appliance feels responsive despite the controller running behind a sealed plastic overlay.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MTCH3380P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MTCH3240P |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 56-pin XQFN | 38-pin XQFN |
| Max Self-Capacitance Sensors | 38 | 24 |
| Max Mutual-Capacitance Sensors | 64 | 32 |
| Slider/Wheel Groups | 8 | 6 |
| On-chip ADCs | 12 (parallel) | 12 (parallel) |
| Acquisition Engine | Charge-transfer, pipelined | Charge-transfer, pipelined |
| Host Interface | I2C | I2C |
| Unit Price (10k qty, as of 2026-10-14) | $1.06 | $0.80 |
Diferenciadores clave
- Parallel sensing with 12 on-chip ADCs (frente a Older sequential-scan capacitive touch controllers)
- Supports up to 64 mutual-capacitance sensors (frente a MTCH3240P (32 mutual-capacitance sensors))
- 8 slider/wheel groups (frente a MTCH3240P (6 slider/wheel groups))
Notas de diseño
Follow Microchip's MTCH3380P PCB layout guidelines: route sensor traces as short, balanced pairs with matched length and width, flood ground on the layer beneath the sensor pattern, and keep high-frequency switching traces (e.g., from the host MCU or motor drive) away from sensor traces. ESD/burst protection should be placed near the connector pins of the overlay, and a guard ring around the sensor area helps reject moisture on the overlay surface.
Estimated: sensor trace capacitance must stay within the MTCH3380P's acquisition range, which is typically a few pF to a few tens of pF. Traces that are too long, too narrow, or routed over power planes will exceed this range and degrade SNR. If touch detection fails intermittently, measure the sensor trace capacitance with an LCR meter before modifying the firmware - layout is the most common root cause.
The 56-pin XQFN package has an exposed thermal pad that should be soldered to a copper pour on the PCB for mechanical stability and thermal dissipation, even though the MTCH3380P dissipates minimal power. The exposed pad also provides a low-impedance ground reference that aids EMI immunity. Keep the I2C pull-up resistors near the controller (not the host) and ensure the VddIO supply is at the high end of its allowable range if I2C rise time is marginal.
Información de cumplimiento
RoHS compliance per Microchip product page. AEC-Q100 not applicable - this is a touch controller for consumer/industrial HMIs, not an automotive-qualified part.
