ATMXT3432S-M-Z2U - maXTouch 32-Bit Touch Controller | Microchip
MPN: ATMXT3432S-M-Z2U β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.47 | $5.47 |
| 10 | $5.19 | $51.90 |
| 100 | $4.92 | $492.00 |
| 500 | $4.65 | $2,325.00 |
| 1,000 | $4.39 | $4,390.00 |
ATMXT3432S-M-Z2U Overview
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.
Drop-in alternatives for ATMXT3432S-M-Z2U β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT3432S-M-ATR
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-A
β Drop-Inπ Reference alternative (not in catalog)
ATMXT2952TD
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-M-Z2U Maximum Ratings & Electrical Characteristics
| Function | Capacitive Touch Screen Controller |
| Family | maXTouch (mXT3432S) |
| Core Architecture | 32-bit |
| Touchscreen Size Support | Up to 17.3 inches |
| Maximum Touch Points | 10 concurrent touches with touch size reporting |
| Design Capability | Shieldless design support |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| Quantity per Package | 260 |
| MSL Level | 3 (168 Hours) |
| ECCN | 5A002A1 |
| Estimated Production Lead Time | 13 Weeks |
| RoHS Status | Lead free / RoHS Compliant |
ATMXT3432S-M-Z2U 260 Pin Configuration Guide
Pin configuration for ATMXT3432S-M-Z2U (260 package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for ATMXT3432S-M-Z2U.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT3432S-M-Z2U is suitable for 6 applications: Industrial HMI Touch Panels, Appliance Control Panels, Smart Home Wall-Mounted Touch Displays, Commercial and Retail Touch Equipment, Medical Device Touch Interfaces, Automotive and Transport Touch Displays.
Industrial HMI Touch Panels
Factory automation and process-control operator terminals commonly use 7-inch to 15.6-inch projected-capacitive displays, exactly the class the ATMXT3432S-M-Z2U targets with its support for screens up to 17.3 inches. The maXTouch 32-bit signal processing engine suppresses noise from nearby switching supplies, VFDs, and industrial displays, maintaining accurate tracking where cheaper controllers lose finger position. Shieldless design capability removes the shield electrode layer from the stack-up, cutting panel cost and thickness. With up to 10 concurrent touches and touch-size reporting, the controller supports gloved-hand operation and palm rejection on operator consoles. The controller sits between the ITO sensor grid and the host PLC interface, reporting calibrated coordinates over its serial host interface.
Recommended
Appliance Control Panels
White-goods and premium appliance interfaces use medium-size glass touch panels where the ATMXT3432S-M-Z2U's combination of high touch count, touch-size reporting, and automatic calibration handles wet fingers, condensation, and panel aging. The maXTouch self-calibration algorithms adapt the baseline as the panel temperature and humidity change during cooking or washing cycles, preventing stuck or ghost touches. Shieldless design support lowers the laminated stack-up cost, which matters at appliance-scale BOM sensitivity. The 32-bit processing core provides mutual-intelligence noise rejection against the inverter-driven motors common in refrigerators and washing machines. Host communication over a standard serial interface connects directly to the appliance main controller board for command and UI event reporting.
Recommended
Smart Home Wall-Mounted Touch Displays
Smart-home thermostats, scene controllers, and wall panels typically integrate 4-inch to 10-inch capacitive touchscreens where the ATMXT3432S-M-Z2U provides responsive multi-touch with minimal host overhead. Its shieldless design enables thinner glass-to-glass or glass-to-film stack-ups that fit slim wall-box form factors, and the 10-concurrent-touch capability with size reporting supports both fingertip and larger-touch gesture recognition. The maXTouch noise-immunity architecture keeps tracking stable next to Wi-Fi, Zigbee, and display backlight circuitry. Because the part is now discontinued, smart-home designers should treat it as a legacy-maintenance component and select the Microchip-recommended ATMXT2952TD for new platforms, reusing the same maXTouch firmware tooling ecosystem for configuration and tuning.
Recommended
Commercial and Retail Touch Equipment
Point-of-sale terminals, self-service kiosks, and hospitality ordering screens in the 10-inch to 17.3-inch class benefit from the ATMXT3432S-M-Z2U's maximum screen-size support and 10-touch real-time tracking. Continuous-duty retail environments demand stable baseline calibration under 24/7 operation and variable customer handling; the maXTouch automatic recalibration and touch-size reporting enable palm rejection across the whole display, preventing false orders from forearm contact. The 32-bit processing engine rejects display-inverter and charging-circuit noise typical of countertop installations. Note that because this controller is discontinued with roughly 13-week lead times on remaining stock, commercial equipment OEMs should plan last-time-buy quantities and qualify the ATMXT2952TD migration path for future service builds.
Recommended
Medical Device Touch Interfaces
Patient monitors, diagnostic equipment, and infusion-pump user interfaces require precise, repeatable touch reporting where the ATMXT3432S-M-Z2U's touch-size data supports accidental-touch rejection, a safety-relevant feature on clinical panels. The shieldless design capability reduces panel thickness for compact bedside devices, while the maXTouch 32-bit noise rejection maintains accuracy near medical-grade switching supplies and display backlights that would desensitize simpler controllers. Automatic calibration compensates for sterilizable front-glass stack-ups and temperature drift within medical operating environments. Designers must observe the MSL 3 (168 hours) handling requirements during contract manufacturing and should note the automotive-qualified ATMXT3432S-A variant for extended-temperature grades. The part's discontinued status warrants a documented replacement plan using ATMXT2952TD.
Recommended
Automotive and Transport Touch Displays
For automotive-adjacent applications, the ATMXT3432S-A variant of the same mXT3432S die carries Automotive Grade 3 qualification, operating from -40C to +85C, per the datasheet index summary, making the die architecture suitable for center-stack and climate-control touchscreens. The 10-concurrent-touch engine with touch-size reporting distinguishes deliberate input from vibration-induced noise on moving vehicles, and the maXTouch mutual-intelligence algorithms reject coupling from in-vehicle displays and EMC-heavy environments such as electric powertrains. Designers targeting new transport platforms should note that the consumer M-Z2U variant itself is discontinued, and Microchip's recommended path is the ATMXT2952TD; the Grade 3 variant remains the reference for extended-temperature validation of the mXT3432S architecture.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT3432S-M-Z2U β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT3432S-M-ATR | ATMXT3432S-A | ATMXT2952TD |
|---|---|---|---|---|
| Brand | Microchip Technology (Atmel legacy) | Microchip Technology | Microchip Technology | Microchip Technology |
| Shieldless Design Support | Yes | Yes | Yes | Yes |
| Lifecycle Status | Discontinued (EOL) | Same family EOL risk | Same family EOL risk | Active (recommended replacement) |
Key Differentiators
- Largest screen support in its class of legacy maXTouch parts (vs ATMXT2912TD-A)
- Shieldless design capability cuts panel BOM cost (vs ATMXT2952TD)
- Automotive-qualified die option exists (vs ATMXT3432S-M-ATR)
Design Notes
The ATMXT3432S family is discontinued; Microchip's official product page recommends the ATMXT2952TD as the alternative touch controller. Do not start new layouts around the M-Z2U. If maintaining legacy boards, secure last-time-buy stock now (open-market stock around 10,598 units was reported, but counterfeit risk is high, so buy authorized only) and begin firmware/port qualification on ATMXT2952TD.
The device has an MSL 3 (168 hours) moisture sensitivity rating and ships in trays of 260. Maintain sealed moisture-barrier storage with humidity indicator cards; if floor life is exceeded, dry-bake before reflow per the Microchip packing specification to prevent package delamination ('popcorning'). Confirm the exact body package and land pattern from the Microchip datasheet, since the distributor summary does not publish the package code.
The maXTouch shieldless design capability removes the shield layer from the sensor stack-up, but it depends on the controller's noise-rejection firmware tuning. Route sensor traces away from display inverter and backlight switching loops, keep the analog front-end supply decoupling close to the IC, and perform panel-level tuning with Microchip's maXTouch tooling for the specific display pairing to maximize SNR.
Compliance Information
Distributor data states Lead free / RoHS Compliant. REACH status is referenced but SVHC determination not published in provided data. ECCN: 5A002A1.
