ATMXT3432S-M-CCUR - 32-bit maXTouch Touch Controller | Microchip
MPN: ATMXT3432S-M-CCUR β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMXT3432S-M-CCUR Overview
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.
Drop-in alternatives for ATMXT3432S-M-CCUR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ATMXT3432S-M-CCUR (same form factor and footprint) β differing in Product Type.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT3432S-M-U
β Drop-Inπ Reference alternative (not in catalog)
ATMXT336S-MAUR
β Drop-Inβ In Stock
$2.83 / Unit
View Datasheet βATMXT336S-MAUO
β Drop-Inπ Reference alternative (not in catalog)
ATMXT336TXES-MAU
β Drop-Inπ Reference alternative (not in catalog)
ATMXT2952TD
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-M-CCUR Maximum Ratings & Electrical Characteristics
| Product Type | Capacitive Touchscreen Controller |
| Family | maXTouch |
| Core | 32-bit touch processor |
| Maximum Touchscreen Size | 17.3 in |
| Design Capability | Shieldless designs supported |
| Sensing Type | Mutual capacitive touch |
| Mounting Type | Surface Mount |
| Ordering Suffix | -M-CCUR (tray/packaging code per Microchip ordering scheme) |
| Recommended Replacement | ATMXT2952TD |
ATMXT3432S-M-CCUR standard Pin Configuration Guide
Pin configuration for ATMXT3432S-M-CCUR (standard 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-CCUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT3432S-M-CCUR is suitable for 6 applications: Home Appliance Touch Panels, Industrial HMI Panels, Smart Home Control Panels, Consumer Touchscreen Displays, Medical Device Interfaces, Automotive-Adjacent Console Panels.
Home Appliance Touch Panels
The ATMXT3432S-M-CCUR fits home appliance HMI panels well because it is optimized for touchscreens up to 17.3 inches and supports shieldless designs, exactly the large cover-lens geometry used on ovens, refrigerators, washing machines, and cooktops. In this role the controller drives the ITO sensor matrix, filters mains and inverter noise with maXTouch noise-immunity algorithms, and reports touch coordinates over its digital host interface to the appliance MCU. Shieldless operation removes the grounded shield layer, cutting panel material cost and stack-up thickness while the 32-bit core maintains touch accuracy near fluorescent and LED displays. Budget NPI time for maXTouch configuration tuning of sensitivity and report rate against the actual glass stack.
Recommended
Industrial HMI Panels
Industrial operator terminals use medium-to-large touch panels where the mXT3432S's 17.3-inch optimization and on-chip 32-bit touch decoding reduce host loading and simplify firmware. Placed directly behind the ITO sensor, the controller acquires mutual-capacitance frames, applies noise filtering against VFD and switching-supply interference typical on factory floors, and streams tracked touch objects to a PLC companion or embedded host. The shieldless design capability shortens the sensor stack, improving optical clarity on gloved-hand-rated panels, while maXTouch configuration tooling lets engineers tune channel gain and report rate for each enclosure. Because the device is transitioning to ATMXT2952TD, design new industrial panels on the recommended alternative for long-term supply.
Recommended
Smart Home Control Panels
Wall-mounted smart home thermostats and scene controllers frequently use 4-to-10-inch touch panels within the mXT3432S operating range. The controller's on-chip touch tracking frees the home-automation MCU from scan-cycle overhead, and its noise filters maintain accuracy with Wi-Fi and display boosters sharing the same PCB. Shieldless design support lowers panel cost in high-volume residential products, where every cent of sensor stack matters. Integration is via the controller's digital host interface with the touch configuration stored in maXTouch tooling; typical designs pair it with a low-power AVR or ARM host that sleeps between touch reports. Evaluate the ATMXT2952TD as the forward path given the phase-out status of this part.
Recommended
Consumer Touchscreen Displays
Consumer products with touch panels up to 17.3 inches, such as small kiosks, countertop displays, and connected fitness or kitchen screens, match the mXT3432S's optimized size range. The 32-bit core performs full-signal-chain processing - electrode drive, analog acquisition, digital filtering, and object tracking - reporting clean coordinates to the application processor and avoiding host-side decoding latency. Shieldless capability reduces stack thickness and haze for optical-quality consumer glass, while maXTouch noise immunity addresses charger and display common-mode noise common in consumer environments. Given the manufacturer-recommended migration to ATMXT2952TD, use this part for existing designs and qualify the alternative for new consumer platforms.
Recommended
Medical Device Interfaces
Point-of-care and clinical device touch interfaces within the 17.3-inch envelope benefit from the mXT3432S's on-chip touch decoding, which keeps measurement firmware deterministic on the medical host MCU by removing scan overhead. maXTouch noise filtering supports operation near switching supplies and display backlights found in medical carts and monitors, and glove-compatible tuning is achievable through configuration parameters. Shieldless stack-up simplifies cleaning-friendly sealed front panels, an important hygiene requirement. Note that any medical design should verify supply, temperature, and qualification data from the official Microchip datasheet, and because the part is being phased out, new medical platforms should be based on the recommended ATMXT2952TD migration path.
Recommended
Automotive-Adjacent Console Panels
Non-safety console and overhead touch panels in commercial and specialty vehicles fall inside the mXT3432S size range. The controller's differential mutual-capacitance sensing and configurable filters help reject conducted noise from vehicle power rails and lighting inverters, while the 32-bit core tracks multiple touch objects without host support - useful for shared control surfaces. Shieldless design reduces stack-up height where headroom is constrained in trim modules. Integration uses the host interface with touch reports consumed by the vehicle body controller; designs must confirm the exact operating temperature and qualification grade from the official datasheet, since the verified public data here does not state an AEC-Q100 grade, and plan migration to the ATMXT2952TD for future builds.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT3432S-M-CCUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT3432S-M-U | ATMXT336S-MAUR | ATMXT2952TD |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 32-bit touch processor | 32-bit touch processor | maXTouch touch processor | maXTouch touch processor |
| Panel Re-tuning Required | N/A (baseline) | No - same die and configuration | Yes - different channel configuration | Yes - different device generation |
Key Differentiators
- Large-format support with shieldless design (vs ATMXT336S-MAUR)
- Manufacturer-endorsed migration path (vs ATMXT2952TD)
- On-chip 32-bit touch decoding (vs Discrete touch MCU solutions)
Design Notes
Treat the ATMXT3432S-M-CCUR as a transitioning part: Microchip's product page names ATMXT2952TD as the recommended alternative touch controller. Before committing new production, confirm remaining stock and last-time-buy windows with your distributor, and evaluate the ATMXT2952TD migration now rather than during an emergency shortage. For the replacement, verify footprint, host interface timing, and firmware API differences against the official datasheets - do not assume pin-to-pin compatibility from the verified data available.
Capacitive touch performance depends on the sensor stack-up, ITO pattern, and cover lens thickness. Route the electrode traces on inner PCB layers away from switching regulators, backlight boosters, and high-current loads, and keep the controller's analog front-end reference and sensor drive traces short with a solid ground plane beneath. Use maXTouch configuration tooling to tune the frequency-hopping and noise filters against the actual panel in the final enclosure, including tests with common chargers attached.
Ordering-code discipline: the -M-CCUR suffix encodes packaging and shipping detail within the Microchip ordering scheme. When second-sourcing within the family (for example ATMXT3432S-M-U), confirm that the suffix difference affects only packaging and not firmware configuration or pre-programmed EEPROM defaults, by comparing the official Microchip ordering information table for both codes before placing production orders.
Compliance Information
Compliance status not stated in the verified web data; confirm RoHS/REACH status from the official Microchip product page or datasheet. AEC-Q100 marked not_applicable pending official qualification data.
