Touch-Sensoren
Produkte (41)
ATMXT3432S-M-CCUR - 32-bit maXTouch Touch Controller | Microchip
The Microchip Technology ATMXT3432S-M-CCUR is a 32-bit maXTouch capacitive touchscreen controller from the maXTouch family, optimized for touchscreens up to 17.3 inches and enabling shieldless designs. As a member of Microchip's maXTouch portfolio, it integrates touch sensing, processing, and host communication in a single touch-sensor IC. A capacitive touch controller is a mixed-signal IC that drives transmit electrodes, measures capacitance changes on receive electrodes, and applies filtering and touch-detection algorithms to convert raw mutual-capacitance data into touch coordinates reported to a host processor. Within the system hierarchy, a capacitive touch controller sits between the ITO touch sensor panel and the application host MCU or application processor, forming part of the human-machine interface (HMI) subsystem of an embedded system. Key features of the mXT3432S include its 32-bit processing core for onboard touch decoding, support for screen sizes up to 17.3 inches, and shieldless design capability, which removes the need for a grounded shield layer and reduces sensor stack-up cost and thickness. The shieldless capability is significant for large-format touch panels where shield layers add material cost and optical haze. The maXTouch family is known for superior performance and a rich feature set, including robust noise immunity for real-world charging and display-noise environments. Architecturally, the device handles the full touch signal chain: electrode drive, analog front-end acquisition, digital filtering, touch object tracking, and reporting over a digital host interface. On-chip processing offloads touch decoding from the host MCU, freeing host bandwidth and simplifying firmware. Configuration of sensor parameters is performed through maXTouch configuration tooling, allowing tuning of sensitivity, report rate, and noise filters for the specific panel stack-up. Typical applications include capacitive touch panels for white goods and home appliances, industrial HMI panels, smart home control panels, and consumer touchscreen displays in the small-to-large format range covered by the 17.3-inch optimization. The shieldless design capability fits cost-sensitive appliance and industrial panels where a shield layer would otherwise be required. A key design consideration is panel tuning: touch performance depends strongly on the ITO pattern, stack-up, and cover lens thickness, so expect to iterate maXTouch configuration parameters with the actual sensor panel, and budget time for mutual-coupling and noise-filter tuning during NPI. This page synthesizes distributor availability, manufacturer cross-reference guidance, and practical design notes not found in the raw product listing.
ATMXT3432S-M-Z2U - maXTouch 32-Bit Touch Controller | Microchip
The Microchip Technology ATMXT3432S-M-Z2U is a maXTouch 32-bit mutual-capacitance touchscreen controller IC optimized for touchscreens up to 17.3 inches, supplied in a tray-packed surface-mount package with MSL 3 (168 hours) moisture sensitivity rating. A capacitive touch controller is a specialized sensor interface IC that measures mutual-capacitance changes across a transparent electrode grid (ITO or similar), converts raw charge measurements into calibrated touch coordinates, and reports gesture and position data to a host processor. In the system hierarchy, the touch controller sits between the passive sensor panel and the host MCU or application processor, forming a key element of the human-machine interface (HMI) subsystem alongside display drivers and backlight controllers. Key features of the mXT3432S include support for up to 10 concurrent real-time touches with touch-size reporting, shieldless design capability that eliminates the costly shield layer from the stack-up, and 32-bit processing for robust noise immunity in demanding environments. The family also communicates with the host via standard serial interfaces, and Microchip notes the maXTouch family is known for superior performance and a rich feature set. Technical depth: the maXTouch architecture integrates analog front-end charge amplifiers, a digital signal processing engine, and self-calibration algorithms that adapt to panel aging, temperature drift, and display noise. Shieldless operation reduces BOM cost and panel thickness, while Automatic Mutual Intelligence mitigates coupling from active-matrix displays. Typical applications include medium-size industrial HMIs, appliance control panels, smart-home and IoT wall-mounted touch displays, and commercial equipment touchscreens in the 7-inch to 17.3-inch class where high touch-count accuracy is required. Design consideration: verify the lead time, currently estimated at approximately 13 weeks per distributor data, and plan inventory accordingly; moisture sensitivity level 3 requires dry-bake or controlled floor-life handling before reflow. This page synthesizes distributor pricing, replacement guidance, and practical design notes not found in the manufacturer datasheet.
ATMXT3432S-S-CU - MaXTouch Capacitive Touch Controller | Microchip
The Microchip Technology ATMXT3432S-S-CU is a maXTouch mXT3432S-series capacitive touchscreen controller (slave IC) supplied in a BGA package in tray packaging. The mXT3432S family is optimized for projected-capacitive touchscreens up to 17.3 inches and enables shieldless sensor designs, reducing stack-up cost and thickness in multi-touch display systems. A capacitive touch controller is a mixed-signal IC that measures tiny capacitance changes on a touch sensor electrode grid, applies proprietary filtering and gesture processing, and reports coordinates to a host processor. Within the system hierarchy, it sits between the passive touch sensor (ITO film or metal-mesh pattern) and the application host, forming part of the human-machine interface (HMI) subsystem alongside display drivers and backlight controllers. Key features of the mXT3432S family include support for up to 10 concurrent real-time touches with touch-size reporting, communication with the host via I2C or USB interfaces, and integrated touch processing that offloads host CPU resources. The shieldless design capability is a differentiating cost feature: by eliminating the dedicated shield layer traditionally required to suppress display noise, the mXT3432S lowers sensor stack cost while maintaining robust noise immunity. Technical depth: Microchip's maXTouch architecture combines a high-resolution capacitance-to-digital front end with an on-chip signal processor running Microchip's touch algorithms, delivering high signal-to-noise ratio even over noisy LCD/AMOLED panels. The -CU suffix denotes the commercial temperature-range grade in a lead-free, RoHS-style suffix convention used across the maXTouch portfolio. Typical applications include industrial HMI panels, smart appliances, automotive center-stack touchscreens (automotive-grade family variants exist), POS terminals, and tablet-format displays in the 10-inch to 17.3-inch class. Design consideration: confirm the exact package pin count, supply voltages, and channel count against the official Microchip datasheet before layout, since maXTouch family members span multiple packages and grades. This page synthesizes distributor listings, cross-reference search results, and drop-in alternative guidance in one place - information normally scattered across Mouser, DigiKey, Octopart, and Microchip product pages.
ATMXT3432S-S-CUR - maXTouch Touch Controller | Microchip
The Microchip Technology ATMXT3432S-S-CUR is a maXTouch mXT3432S capacitive touchscreen controller IC supplied as a Slave IC in a BGA package on tape and reel. The mXT3432S family is optimized for projected-capacitive touchscreens up to 17.3 inches and enables shieldless designs, reducing stack-up cost and module thickness. A projected-capacitive touch controller is a mixed-signal IC that drives excitation signals into a transparent ITO sensor grid, measures mutual-capacitance changes at each crossing node, and applies proprietary acquisition and filtering algorithms to report accurate touch coordinates to a host over I2C or SPI. Within the signal-chain hierarchy, it sits between the passive sensor stack and the host processor, functioning as the front-end of the human-machine-interface subsystem alongside display drivers and haptic ICs. Key features of the ATMXT3432S family include support for screens up to 17.3 inches, shieldless design operation that removes the need for a separate shield electrode, high signal-to-noise ratio acquisition hardware, wet-finger and gloved-touch performance, and Microchip's maXTouch feature set for superior responsiveness. The 'R' suffix in the ordering code denotes tape-and-reel delivery for automated SMT assembly, while the '-CUR' grading indicates the industrial operating grade. Technically, the device integrates analog front-end acquisition blocks, a digital signal processing core, and on-chip memory for configuration objects. The maXTouch object-based architecture allows designers to tune acquisition settings, touch thresholds, and gesture parameters through configuration objects rather than firmware rewrites. Typical applications include tablet and notebook touchscreens, industrial HMI panels, smart appliances, automotive-adjacent infotainment-adjacent displays, and point-of-sale terminals where medium-format capacitive touch is required without a shield layer. When designing with this part, validate the configuration object set against your specific sensor stack and cover-glass thickness, since shieldless operation is more sensitive to grounding and display-noise conditions. This page synthesizes distributor availability data, Microchip's official family positioning, recommended alternatives, and practical selection notes not consolidated in any single manufacturer datasheet.
ATMXT540SXES-CCUR - maXTouch 540-Ch Touch Controller | Microchip
The Microchip Technology (Atmel) ATMXT540SXES-CCUR is a maXTouch 540-channel projected-capacitive touchscreen controller IC from the maXTouch X series, supplied in bulk packaging. It belongs to the Atmel/Microchip maXTouch family of capacitive touch sensor ICs and provides mutual-capacitance touch acquisition for multi-touch human interface designs. A capacitive touchscreen controller is a type of sensor interface IC that scans a grid of transparent electrodes (ITO pattern) on a touch sensor, measures mutual capacitance changes caused by finger proximity, and reports processed touch coordinates to a host processor. Within the system hierarchy, the touchscreen controller sits between the touch sensor panel and the application host, forming part of the human-machine interface (HMI) subsystem alongside displays, buttons, and gesture engines. The ATMXT540SXES-CCUR is part of the maXTouch 540 series, engineered for multi-touch screens supporting standard touch and stylus use cases. Key family features typically include mutual-capacitance sensing, multi-touch reporting, noise-robust acquisition algorithms for charger and display noise immunity, and host communication over a serial interface (I2C/SPI per the maXTouch family convention). The '-CCUR' suffix denotes a specific pinout and packaging configuration in the XS pin-combination matrix of the maXTouch naming scheme. Architecturally, maXTouch devices integrate an acquisition engine with programmable scan frequencies and filtering that suppresses interference from LCD displays and switching chargers, allowing reliable touch operation in electrically noisy environments. The integrated touch processing offloads touch detection and tracking from the host CPU, reducing host software complexity and latency. Typical applications include smartphones, tablets, industrial HMI panels, automotive center-stack touchscreens, and smart appliance control surfaces where multi-touch capacitive sensing is required. Design consideration: touchscreen controller selection must match both the sensor electrode pattern (TX/RX channel count) and the mechanical stack-up; verify the exact channel matrix and interface before footprint commitment. Refer to the official Microchip maXTouch configuration tools for sensor tuning. This page synthesizes distributor availability, drop-in variant cross-references, and practical design guidance beyond the manufacturer datasheet.
ATMXT768E-CU - maXTouch 16-Touch Capacitive Touch IC | Microchip
The Microchip Technology ATMXT768E-CU is a maXTouch mXT768E-AT mutual-capacitance touchscreen controller IC supporting touchscreens up to 10.1 inch diagonal (and larger), with detection of up to 16 simultaneous touches, housed in a 96-ball VFBGA package. A capacitive touch controller is a specialized mixed-signal IC that drives transmit and receive electrodes on a touch sensor, measures mutual-capacitance changes at each node, and applies proprietary signal-processing algorithms to report finger, stylus, and gloved-touch coordinates to a host processor. Within the touch system hierarchy, it sits between the raw touch sensor (a patterned ITO or similar conductor on glass or film) and the host interface, forming the sensing layer of human-machine-interface (HMI) subsystems in embedded, industrial, and consumer designs. Key features include 16-touch simultaneous detection, support for shieldless single-layer sensor constructions that reduce stack-up cost and thickness, gloved-touch operation, and the maXTouch advanced touch-overlapping finger tracking for high-resolution, highly responsive operation on panels up to 10.1 inches or larger. The mXT768E-AT is part of Microchip's maXTouch E-series family, which integrates the acquisition engine and touch-processing firmware on-chip so the host receives processed touch reports rather than raw capacitance data. Technically, the device uses mutual-capacitance scanning with Microchip's maXTouch acquisition technology, performing self- and mutual-capacitance measurement cycles and on-chip filtering to reject display and charger noise. Configuration and calibration data are typically stored in an external EEPROM or the host flash and loaded at power-up over the I2C-compatible interface. Typical applications include industrial HMI touch panels, smart appliances, point-of-sale terminals, medical control panels, and larger-format embedded displays up to 10.1 inches and beyond. Design consideration: note that Microchip has designated the ATMXT1189TD-A as the recommended alternative touch controller, so new designs should evaluate this part and plan for lifecycle management. This page synthesizes distributor availability, the manufacturer-recommended replacement, and lifecycle guidance not consolidated in any single datasheet or distributor listing.
ATMXTS100-CUR - maXStylus Active Stylus ASIC | Microchip
The Microchip Technology ATMXTS100-CUR is a maXStylus Generation I active stylus ASIC, a capacitive touch sensor integrated circuit from the maXTouch family designed to drive and process signals for active electromagnetic-stylus touchscreen systems. It is supplied on Tape & Reel, carries ROHS3 compliant status, and is marketed as IC SENSOR MAXTOUCH in distributor catalogs. A capacitive touch sensor IC is a mixed-signal device that interfaces between a human-interface surface (touchscreen digitizer, stylus tip, or sensor electrode array) and a host processor. In the broader hierarchy of human-interface electronics, it sits within the touch and stylus controller category of interface and sensor ICs, converting analog capacitance or coupled-signal measurements into digitized position data. The maXStylus line was developed by Atmel, whose touch business was acquired by Microchip Technology, and the part is still referenced under both Atmel and Microchip brand names in distribution. The key differentiating feature of the maXStylus Gen I architecture is its purpose-built integration of stylus drive and sensing functions in a single ASIC, reducing the bill of materials for active-pen designs compared with discrete transmit/receive chains. Typical implementations pair this ASIC with a digitizer sensor stack and an I2C or SPI link to the host (exact interface details should be confirmed from the manufacturer datasheet). Typical applications include active stylus systems for tablets and e-notebooks, signature capture terminals, and pen-input industrial operator panels. Because the part is an ASIC for a specific stylus ecosystem, design-in is normally tied to Microchip maXStylus reference designs. A key design consideration is verifying ecosystem compatibility: active stylus protocols are generally not interchangeable between vendors, so second-sourcing typically requires requalification of the stylus and digitizer stack rather than a simple pin swap. This page synthesizes distributor stock data, compliance status, and sourcing context not consolidated in any single manufacturer or distributor listing. Pricing, package dimensions, and detailed electrical parameters marked as [DATA_NEEDED] should be confirmed against the official Microchip datasheet before design-in.
CAP1126-1-AP-TR - 6-Channel Capacitive Touch Sensor, 2 LED Drivers | Microchip
The Microchip Technology CAP1126-1-AP-TR is a 6-channel capacitive touch sensor with two integrated LED drivers, housed in a 16-pin QFN (4x4 mm) package. Built on RightTouch® technology, it provides programmable sensitivity, automatic recalibration, and proximity detection for robust touch interfaces in noisy environments. A capacitive touch sensor is a solid-state device that detects the presence of a finger (or conductive object) by measuring the change in capacitance on an electrode. In the system hierarchy, the CAP1126 belongs to the capacitive sensor IC category, sitting above simple mechanical switches and below full touchscreen controllers. Compared with mechanical buttons, capacitive touch sensors offer sealed, aesthetically pleasing surfaces, no moving parts, and longer operational life, while still being lower complexity and lower cost than projected capacitive touchscreens. Key features include 6 independent capacitive touch inputs with programmable sensitivity, automatic recalibration to compensate for environmental drift, 2 LED drivers supporting on/off, variable-rate blinking, breathing, and dimming effects, an I2C/SMBus-compatible interface, and Multiple Pattern Touch recognition that reports simultaneous button presses as a distinct event. The integrated proximity-detection circuitry enables wake-on-approach operation, reducing system power consumption when no user is present. Technically, the CAP1126 uses a charge-transfer-based sigma-delta conversion technique for each sensor channel, providing high noise immunity against power-line and RF interference. Its automatic recalibration loop continuously adjusts the sensor baseline so that slow environmental changes (humidity, temperature) do not produce false triggers. The device operates from a single 3.0V to 3.6V rail, draws approximately 500 uA active supply current, and offers programmable interrupt signaling to the host MCU. Typical applications include consumer electronics front panels, white goods and appliance control surfaces, notebook and tablet button strips, industrial control keypads, and IoT devices requiring simple, sealed touch interfaces with visual LED feedback. The 2 integrated LED drivers directly drive indicator LEDs without external transistors. When designing with this device, ensure the touch sensor PCB pads are routed with adequate ground isolation and follow the Microchip Touch Sensor Design Guide layout recommendations. The I2C address is hardware-fixed on the -1 variant (0x28); verify bus conflicts with other peripherals on the same I2C bus. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, providing unique value for both component selection and board bring-up.
CY8CMBR3002-SX1IT - 2-Button CapSense Express | Infineon
The Infineon CY8CMBR3002-SX1IT is a CAPSENSE MBR3 family capacitive touch button controller with 2 CapSense I/O channels, supplied in an 8-pin SOIC package with tape-and-reel packaging. It integrates Infineon's third-generation CSD PLUS (CapSense Sigma Delta Plus) sensing technology and provides a configurable 1.71 V to 5.5 V supply range with an operating temperature range of -40 °C to +85 °C, making it suitable for consumer, industrial, and appliance front-panel designs. A CapSense controller is a specialized mixed-signal IC that replaces mechanical buttons by detecting changes in capacitance caused by finger proximity or touch. Capacitive touch controllers sit within the broader category of human-machine interface (HMI) ICs, alongside touch-screen controllers, proximity sensors, and gesture-recognition devices. The CY8CMBR3002-SX1IT specifically targets simple button-only applications where ultra-low standby power, robust water-tolerance, and a minimal external BOM are more important than host MCU programmability. Key differentiating features include 2 CapSense I/O supporting up to 2 buttons, integrated SmartSense auto-tuning that eliminates manual CAPSENSE parameter calibration, an active-low mechanical replacement output (active-low when finger detected, active-high on release), I2C/SMBus configuration interface, low standby current optimized for battery-powered products, and an operating voltage range of 1.71 V to 5.5 V that covers 1.8 V, 3.3 V, and 5 V rails. The SOIC-8 footprint eases hand-soldering and rework compared to QFN alternatives. Architecturally, the CY8CMBR3002-SX1IT uses a Sigma-Delta ADC plus a proprietary CSD PLUS signal-processing pipeline to convert capacitive changes into digital button-state outputs. On-chip EEPROM-backed configuration registers allow designers to tune sensitivity, response time, and noise immunity through EzClick/I2C, eliminating firmware development and reducing time-to-market versus a programmable PSoC solution. Typical applications include replacement of mechanical buttons in white goods, kitchen appliances, and consumer electronics; touch keypads in audio devices and remote controls; rugged sealed keypads in industrial control panels; waterproof buttons for outdoor IoT devices; and low-power wake-up buttons in battery-powered smart-home sensors. The wide 1.71 V to 5.5 V range also supports single-cell Li-ion or 3 V coin-cell operation. When designing with the CY8CMBR3002-SX1IT, choose the external sense capacitor and PCB overlay geometry to balance sensitivity against water-film immunity. Power the device from a clean rail because noise on VDD directly translates into false-touch events, and place the device close to the sensors to keep the capacitive trace area small. This page synthesizes distributor pricing from LCSC and Octopart, cross-references pin-compatible Infineon MBR3 family alternatives, and packages practical design notes that are not consolidated in the manufacturer datasheet alone.
ILI2511 - 65-Channel Capacitive Touch Controller | ILITEK
The ILITEK ILI2511 is a single-chip capacitive touch sensor controller optimized for POS, ATM, and industrial capacitive touch panel applications. It integrates a high-speed Capacitance-to-Digital Converter (CDC) with 65 channels total, a high-voltage driver/sense chain, a high-voltage charge pump controller, an on-chip high-voltage regulator, and a 32-bit microcontroller core, all in a compact QFN-88 package (10x10 mm with exposed pad). The controller supports USB, I2C, and UART host interfaces, and complies with Windows 8.1 and Windows 10 HID-class touch specifications. What is a capacitive touch sensor controller? A capacitive touch controller is a mixed-signal IC that drives an array of electrodes (TX/RX lines) and measures the tiny changes in self- or mutual-capacitance caused by a finger or stylus near the panel. These measurements are digitized and processed by an embedded MCU to produce touch coordinates and gestures. In the broader taxonomy, the ILI2511 sits as: capacitive touch controller -> projected capacitive touch (PCAP) controller -> touch sensor IC -> mixed-signal interface IC -> semiconductor. PCAP controllers replaced legacy resistive touch in nearly all modern point-of-sale and industrial-human-machine-interface (HMI) panels. Key features include 65 sensing channels that map to panels up to ~15.6" in diagonal, an embedded high-voltage charge pump that drives large-panel stacks without external DC-DC circuitry, on-chip firmware with touch and gesture reporting, and a hardware-qualified HID descriptor compatible with mainstream operating systems. Industrial-grade ESD protection and wide operating-temperature support make the part well suited to POS terminals, ATMs, medical carts, and factory HMI displays. The ILI2511 integrates the analog front-end and digital MCU on a single die, which removes the need for an external host MCU to run the touch pipeline. The on-chip charge pump and HV regulator let the part bias the TX electrodes at the higher voltage needed for thick cover-glass or glove-touch operation, while the 32-bit core handles noise filtering, baseline tracking, and multi-touch reporting internally. Typical applications include POS checkout terminals, ATM touchscreens, industrial control panels, medical equipment HMIs, self-service kiosks, and information displays. The USB and I2C interfaces allow drop-in integration with Windows PCs, embedded Linux boards, and standalone MCU hosts. When designing with the ILI2511, follow the ILITEK reference layout for the QFN-88 EP land pattern, keep the high-voltage charge-pump traces short and surrounded by ground, and use the recommended ITO/stackup from the panel vendor to achieve the rated touch sensitivity. Add ESD protection on the USB D+/D- lines if the panel is exposed to user handling. This page synthesizes verified ILITEK datasheet parameters, distributor pricing, and a curated list of drop-in alternative touch controllers you can evaluate for sourcing risk or second-source qualification - information not aggregated on any single manufacturer or distributor page.
MTCH102T-I/MU - 2-Ch Capacitive Touch/Proximity Controller | Microchip
The Microchip Technology MTCH102T-I/MU is a 2-channel capacitive proximity and touch controller with simple digital outputs, housed in an 8-pin UDFN (3x3 mm) surface-mount package. It integrates an advanced optimization algorithm that actively suppresses environmental and EMI noise from the touch sensor signal, while configurable sensitivity and an ultra-low-power operating mode make it suitable for battery-powered human-interface applications. The device outputs a logic-level HIGH/LOW signal per electrode without requiring external host processing, simplifying front-panel design. 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.
MTCH105-I/ST - 5-Ch Proximity/Touch Controller, TSSOP-14 | Microchip
The Microchip MTCH105-I/ST is a 5-channel capacitive proximity and touch controller from Microchip's mTouch family, housed in a 14-pin TSSOP package. The part integrates an advanced optimization algorithm that actively suppresses environmental noise to deliver reliable proximity and touch detection across five independent electrodes, and provides five simple digital active-low outputs. The I/ST suffix designates the industrial temperature grade (-40C to +85C) and TSSOP-14 packaging. A capacitive touch controller is a mixed-signal IC that measures changes in electrode capacitance caused by a human finger or conductive object approaching or touching a sensor pad. The MTCH105 sits within a hierarchy of capacitive sensing solutions, between simple discrete RC touch circuits and full-featured MCU-based touch libraries. As a turnkey "Direct Button Replacement" device, it eliminates the firmware burden typically associated with capacitive touch by translating proximity/touch state into five discrete logic outputs, letting designers replace mechanical switches with touch buttons while keeping the host MCU free for application tasks. Key features of the MTCH105-I/ST include 5 sensor channels, 5 simple digital outputs, configurable sensitivity via the MTSA pin, configurable power mode via the MTPM pin, an integrated active guarding driver that reduces parasitic capacitance effects, and a wide operating voltage range from 2.05V to 3.6V. The device operates from a single supply rail and is designed for low average current consumption, enabling battery-powered products such as remote controls, IoT endpoints, and wearable human-machine interfaces. From an architectural standpoint, the MTCH105 uses a charge-transfer measurement front-end coupled with a digital signal-processing engine that runs the noise-suppression optimization algorithm on each measurement cycle. The MTSA pin selects sensitivity presets, and the MTPM pin sets the active scan rate vs low-power standby trade-off. The active guard signal is driven in phase with the sensing waveform, cancelling parasitic capacitance to the sensor pad and dramatically extending touch range. The five open-drain (or push-pull, depending on datasheet configuration) outputs are simple logic-level signals that drive downstream MOSFETs, optocouplers, or GPIO inputs directly. Typical applications for the MTCH105-I/ST include replacing mechanical buttons on white goods, audio mixer faders and rotary controls, smart-lighting wall switches, access-control keypads, proximity wake-up sensors in IoT nodes, and consumer remote-control touch surfaces. The TSSOP-14 footprint supports compact PCB layouts and is well suited to cost-sensitive designs. When designing with the MTCH105-I/ST, place sensor pads on a top-layer copper pour with a thin dielectric overlay (typically 1-3 mm of plastic or glass), keep sensor traces short and surrounded by ground, and add a series resistor (typically 4.7 kohm to 47 kohm, see datasheet) near each sensor pin for noise immunity. Bypass VDD with a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin. Confirm EMC performance using the datasheet's reference design. This page synthesizes distributor pricing for the TSSOP-14 variant, drop-in alternatives within the MTCH102/105/108 family and selected competitors, plus practical design notes drawn from the Microchip mTouch proximity/touch product family, information not consolidated on a single manufacturer or distributor page.
MTCH108-I/GZ - 8-Channel Capacitive Touch Controller | Microchip
The Microchip Technology MTCH108-I/GZ is an 8-channel capacitive proximity/touch controller with 8 simple digital outputs, housed in a 20-pin UQFN (4x4 mm) package. It provides active noise suppression, configurable sensitivity and configurable power mode for human-interface panels that need to detect proximity or touch through glass, plastic or other non-metallic overlays. The device operates as a stand-alone controller — no host MCU firmware is required to interpret touch state, simplifying BOM and firmware load. A capacitive touch controller (also called a proximity/touch sensor IC) is a mixed-signal device that measures changes in capacitance on a sensor electrode and converts them into a clean digital logic level. MTCH108 sits in the broader sensor IC hierarchy: sensor IC -> capacitive sensor -> touch controller -> human-interface IC -> power management and sensing subsystem. It typically sits upstream of an MCU which reads the 8 digital output pins to interpret user gestures. Key features include 8 independent sensing channels, an advanced optimization algorithm that actively suppresses environmental noise from the signal path, configurable sensitivity per channel, configurable power mode (low-power standby vs active scan), and 8 simple push-pull digital outputs that mirror touch state. The UQFN-20 (4x4 mm) package is optimized for compact front-panel PCB layouts and is compatible with standard reflow profiles. Typical applications include white-good front panels (washing machines, dishwashers, induction cooktops), industrial HMI keypads, smart-home wall switches, lighting control panels, automotive interior controls (with appropriate AEC-Q100 variant where required), and any battery-powered product requiring mechanical-button replacement. The integrated noise-suppression algorithm makes it well suited to appliances with motors, relays or other EMC noise sources. When designing with this device, route the sensor electrodes directly to the MTCH108 pins, keep the electrode traces short, and follow Microchip's recommended ground-ring and hatch-fill pattern around each electrode for stable touch performance. A 100 nF decoupling capacitor on VDD placed within 5 mm of the IC is required.
MTCH108-I/SS - 8-Channel Capacitive Touch Controller | Microchip
The Microchip Technology MTCH108-I/SS is a 2.05 V to 3.6 V, 8-channel capacitive proximity/touch controller with 8 simple digital outputs, housed in a 20-pin SSOP package. It is part of the mTouch MTCH102/105/108 family and integrates active guarding, automatic noise suppression, and configurable power-mode scanning (MTSA and MTPM pins). What is a capacitive touch controller? A capacitive touch controller is an integrated circuit that detects changes in capacitance caused by finger proximity or touch and converts them into digital signals for the host MCU. Capacitive touch ICs are sub-categories of human-machine interface (HMI) sensor ICs, sitting within signal conditioning and sensor interface semiconductor blocks. Compared to mechanical buttons they deliver hermetic, low-power, wear-free user inputs. Key features of the MTCH108-I/SS include: 8 independent proximity/touch channels, 8 dedicated digital outputs that mirror touch state, an advanced optimization algorithm that actively suppresses conducted and radiated noise from the touch signal, configurable low-power and smart-scheduling scan modes selectable through the MTPM pin, plus host-side sensitivity trimming through the MTSA pin. The active guarding feature drives a shield signal onto the sensing electrode to suppress water-drop and hover-induced false triggers. The architecture combines a charge-transfer analog front end with a digital state machine that runs Microchip's mTouch noise-immunity sequence. Each channel is processed independently, allowing simultaneous proximity and direct-touch detection. The device communicates touch state purely through GPIO-level logic, removing the need for an I2C/SPI host transaction on every press and reducing host firmware complexity. Typical applications include white-goods control panels (induction cooktops, washing machines, refrigerators), door-entry keypads, automotive interior lighting touch pads, IoT product vending, and consumer-electronics front panels. The SSOP-20 footprint supports hand-soldered prototypes as well as high-density SMT production lines. When designing with the MTCH108-I/SS, lay out the MTPM pin resistor network first to lock down scan interval and current consumption before PCB fabrication. Bypass VDD with a 100 nF ceramic close to the IC, and route sensor traces with a ground fill at least 0.5 mm away to minimize parasitic capacitance. This page synthesizes verified distributor pricing, drop-in SSOP-20 alternatives from the same MTCH family, and practical design notes that go beyond what the Microchip datasheet alone provides for engineers selecting an 8-channel capacitive touch controller.
MTCH108-I/SS - 8-Channel Proximity/Touch Controller IC | Microchip
The Microchip MTCH108-I/SS is an 8-channel Proximity/Touch controller housed in a 20-pin SSOP package, integrating 8 simple digital outputs that map directly to the 8 capacitive sensing channels. Operating from a 2.05 V to 3.6 V supply, it provides configurable sensitivity and power-mode selection via the MTSA and MTPM pins, and uses an advanced optimization algorithm to actively suppress noise from the touch signal for reliable proximity and touch detection in noisy environments. The device belongs to the same MTCH10x family as the 2-channel MTCH102 and 5-channel MTCH105, allowing a single PCB footprint to scale across product lines. A capacitive touch controller is a mixed-signal integrated circuit that measures capacitance changes caused by a user's finger on a sensor pad, converts the analog delta into a digital state, and outputs a clean logic-level signal. Within the broader semiconductor taxonomy, the MTCH108 sits in the hierarchy: capacitive touch controller -> touch screen / human-interface controller -> sensor IC -> mixed-signal semiconductor. It removes the firmware burden of touch processing by providing a hardware-only solution with no MCU programming required, making it ideal for low-MCU or pure-logic designs. Key specifications include 8 simultaneous capacitive sensing inputs, an integrated guard-ring driver for moisture immunity, automatic calibration across sensitivity levels, and low active current suitable for battery-powered applications. The MTCH108 supports both proximity (hover) and direct-touch detection modes, enabling wake-on-approach behavior in IoT devices. The 20-pin SSOP package has standard 0.65 mm pitch and 5.30 mm body width for easy hand-soldering and visual inspection during prototyping. Typical applications include consumer appliance control panels, industrial HMI keypads, automotive interior lighting controls, IoT smart-home touch buttons, and replacement of mechanical switches in sealed enclosures. The wide operating voltage range supports direct connection to 3.3 V rails commonly used by Microchip PIC and SAM microcontrollers, simplifying power-tree design. When designing with the MTCH108, ensure the sensor pad geometry follows Microchip's layout guidelines to maximize SNR, and place a 100 nF decoupling capacitor within 5 mm of the VDD pin. The MTPM pin can be tied high for maximum sensitivity or low for lower power consumption depending on system requirements. This page consolidates distributor stock, parametric drop-in alternatives (including the lower-channel MTCH102 and MTCH105), and practical PCB layout notes that complement - but do not replace - the manufacturer datasheet.
MTCH3240P - 32-Key Turnkey Capacitive Touch Controller | Microchip
The Microchip MTCH3240P is a turnkey capacitive touch controller that supports up to 32 mutual-capacitance or 24 self-capacitance sensors, housed in a 38-pin XQFN package. It integrates 12 on-chip analog-to-digital converters for parallel sensing, delivering fast touch acquisition time and high SNR in a turnkey firmware model. A capacitive touch controller is a mixed-signal integrated circuit that measures changes in capacitance caused by a human finger and converts those measurements into digital touch events for buttons, sliders, and wheels. Capacitive touch controllers sit within the broader category of human-machine interface (HMI) front-ends, alongside display drivers and force-touch ASICs. They are commonly used in display-free or display-optional appliances where mechanical switches would reduce product lifespan. Key features of the MTCH3240P include support for up to 6 slider/wheel groups, an I2C interface with selectable address for host communication, and hardware RESET for full device re-initialization. Microchip specifies the device for home appliances and outdoor applications, where its parallel-sensing engine provides deterministic response time even with high sensor counts. Architecturally, the MTCH3240P uses a charge-transfer acquisition engine implementing Microchip's patented capacitive sensing method, paired with an on-chip CPU that classifies and tracks individual touch events. The 12 parallel ADCs sample multiple sensors simultaneously, which is the key architectural choice that differentiates it from sequential-scan touch controllers in the same class. This approach trades off absolute conversion flexibility for sub-frame scan times. Typical applications include display-free control panels on washing machines and induction cooktops, outdoor lighting controllers, doorbell and intercom touch pads, and HVAC control interfaces. The 38-pin XQFN package suits compact PCB layouts where sensor routing benefits from the chip's perimeter pin arrangement. When designing with the MTCH3240P, route each sensor trace to minimize coupling to ground pours and avoid long parallel traces with switching signals. Pull-up resistor values on the I2C bus may need to be reduced when VddIO operates at the low end of the allowable range, per the datasheet I2C specification guidance. This page synthesizes distributor availability, drop-in alternatives, and practical design guidance beyond the manufacturer datasheet, helping hardware engineers select and qualify the MTCH3240P for display-free HMI designs.
MTCH3380P - 38/64-Sensor Turnkey Capacitive Touch Controller | Microchip
The Microchip Technology MTCH3380P is a turnkey capacitive-touch controller supporting up to 38 sensors in self-capacitance mode and up to 64 sensors in mutual-capacitance mode, plus 8 slider/wheel groups, in a 56-pin XQFN package. It delivers fast touch acquisition and high signal-to-noise ratio through parallel sensing using 12 on-chip analog-digital converters that sample multiple sensors simultaneously, making it ideal for display-free HMI designs in home appliances and outdoor equipment. 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.