ATMXT3432S-S-CU - MaXTouch Capacitive Touch Controller | Microchip
MPN: ATMXT3432S-S-CU β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.9 | $6.90 |
| 10 | $6.35 | $63.50 |
| 100 | $5.7 | $570.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.75 | $4,750.00 |
ATMXT3432S-S-CU Overview
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.
Drop-in alternatives for ATMXT3432S-S-CU 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-S-CU (same form factor and footprint) β differing in Communication Interface, Concurrent Touches, Product Type.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT3432S-SXES-CU
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-M-ATR
β Drop-Inπ Reference alternative (not in catalog)
ATMXT2952TD
β Drop-Inπ Reference alternative (not in catalog)
ATMXT2912TD-A
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-S-CU Maximum Ratings & Electrical Characteristics
| Product Type | Capacitive Touch Screen Controller (Slave IC) |
| Family | maXTouch mXT3432S |
| Touch Technology | Projected Capacitive |
| Maximum Touchscreen Size | 17.3 in |
| Concurrent Touches | Up to 10 |
| Touch Size Reporting | Yes |
| Communication Interface | I2C or USB |
| Design Type | Shieldless design supported |
| Recommended Alternative Controller | ATMXT2952TD (per Microchip product page) |
| Package | BGA |
| Packaging | Tray |
| Mounting Type | Surface Mount |
ATMXT3432S-S-CU bga Pin Configuration Guide
Pin configuration for ATMXT3432S-S-CU (bga 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-S-CU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT3432S-S-CU is suitable for 6 applications: Industrial HMI Touch Panels, Smart Appliance Displays, Point-of-Sale and Kiosk Terminals, Tablet and Portable Display Devices, Medical Device Control Panels, Automotive Center-Stack Touchscreens.
Industrial HMI Touch Panels
Factory and machine-interface touchpanels in the 10-inch to 17.3-inch class benefit directly from the mXT3432S's large-screen optimization and shieldless design support. The controller's ability to process up to 10 concurrent touches with touch-size reporting enables gloved-hand operation and palm rejection in environments where operators wear protective gear. Because the integrated maXTouch signal processor handles capacitance-to-digital conversion and filtering on-chip, the host MCU or PLC companion processor is freed from touch scan overhead, simplifying firmware. In electrically noisy industrial settings near VFDs and contactors, the mXT3432S noise-immunity algorithms maintain reporting accuracy without a shield layer, reducing sensor stack cost. Typical deployment pairs the controller with an industrial-grade host such as an ATMEGA or PIC family MCU over I2C.
Recommended
Smart Appliance Displays
Modern refrigerators, ovens, and laundry appliances increasingly use 7-inch to 17-inch projected-capacitive touchscreens as their primary user interface. The ATMXT3432S-S-CU fits this segment because its shieldless-design capability removes a full ITO/mesh layer from the display stack, cutting both material cost and glass thickness - critical constraints in appliance door panels. Its 10-touch engine with size reporting supports multi-finger gestures for recipe navigation and damp-hand operation common in kitchen environments. Communication over I2C or USB lets appliance makers integrate the touch subsystem with either a dedicated MCU or a USB-capable main SoC. Microchip's maXTouch configuration tooling allows field-tuning of water-tolerance and glove parameters, which shortens the validation cycle against condensation and wet-finger conditions typical of appliance front panels.
Recommended
Point-of-Sale and Kiosk Terminals
POS terminals and self-service kiosks use touchscreens from 10 to 17.3 inches where the mXT3432S's screen-size optimization and multi-touch reporting deliver a responsive customer experience. Shieldless design support reduces the sensor stack cost across the high volumes typical of retail hardware rollouts. The USB host-interface option is particularly valuable here: many POS mainboards already expose USB, so the touch function can be added without a dedicated I2C bus or driver-layer rework. The on-chip maXTouch processing delivers low report latency and stable coordinate tracking needed for signature capture and PIN-pad gestures. In continuous-duty retail environments, the controller's noise immunity over backlit LCD panels keeps touch accuracy stable despite switching backlight and power-supply interference common in countertop hardware.
Recommended
Tablet and Portable Display Devices
Tablet-format products with displays in the 10-inch to 17.3-inch range are the core target of the mXT3432S family. The controller reports up to 10 simultaneous touches with touch-size data, enabling modern multi-finger UI paradigms such as pinch-zoom, rotation, and palm rejection while the user rests a hand on the glass. Its integrated signal-processing architecture offloads touch scanning from the application processor, reducing system power consumption and simplifying the software stack. The shieldless capability is a decisive BOM advantage in cost-sensitive portable designs, removing the shield layer and its routing complexity from the sensor stack. Communication flexibility (I2C for embedded processors or USB for x86/SoC platforms) lets the same touch subsystem be reused across product variants without redesigning the sensor.
Recommended
Medical Device Control Panels
Benchtop diagnostic equipment, infusion pumps, and patient-monitoring consoles use 10-inch to 15-inch touchscreens where reliable, repeatable touch response is a usability and safety requirement. The ATMXT3432S-S-CU's touch-size reporting supports palm rejection so that a clinician's resting hand does not generate false inputs during adjustments - a documented maXTouch family capability with 10 concurrent touches. Its on-chip processing provides deterministic, low-latency coordinate reporting suitable for safety-reviewed HMI software architectures. Shieldless design support simplifies the glass stack, easing cleaning-sealing requirements for medical-grade front panels. Note that the -CU commercial grade may require review against your device's environmental spec; Microchip offers automotive and extended-grade variants of related maXTouch parts (for example Grade 3 qualified devices rated -40 to +85 C) when harsher conditions apply.
Recommended
Automotive Center-Stack Touchscreens
Automotive center-stack and cluster displays are a major maXTouch market, and Microchip documents the related mXT3432S-A variant as fully automotive-qualified (Grade 3) operating from -40 to +85 degrees C. For production automotive designs, select the qualified automotive ordering code rather than the commercial -CU part reviewed here; the family architecture - 10-touch engine with size reporting, I2C/USB interfaces, and shieldless operation - carries across variants. The shieldless capability is especially valuable in automotive, where display-stack height and cost are constrained, and where display-noise immunity from AMOLED and high-brightness LCD backlights is a known challenge. Microchip's recommended continuity path (ATMXT2952TD family) provides a migration route for long automotive program lifecycles, protecting software investment in the maXTouch configuration model across generational platform changes.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT3432S-S-CU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT3432S-SXES-CU | ATMXT3432S-M-ATR | ATMXT2952TD | ATMXT2912TD-A |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Family | maXTouch mXT3432S | maXTouch mXT3432S | maXTouch mXT3432S | maXTouch mXT2952T | maXTouch mXT2912T |
Key Differentiators
- Shieldless design capability (vs ATMXT2952TD)
- Large-screen optimization up to 17.3 in (vs ATMXT2912TD-A)
- Manufacturer-defined continuity path (vs ATMXT3432S-SXES-CU)
Design Notes
Ordering-code discipline matters in the maXTouch portfolio: ATMXT3432S is a family name and the full MPN ATMXT3432S-S-CU encodes grade and packaging. Related family members ship in different packages (e.g., LQFP-144 variants referenced by distributors), so a suffix-only substitution can break the PCB footprint. Before release, pull the package outline drawing from the official Microchip product page and verify ball count and ball map against your land pattern.
The mXT3432S supports shieldless designs, which places the burden of display-noise rejection on the controller's algorithms and your sensor layout. Keep the touch sensor traces away from switching backlight rails and LCD flex cables where possible, follow Microchip's maXTouch sensor design guidelines for trace pitch and routing on the flex, and reserve firmware headroom to re-tune noise thresholds (via the maXTouch configuration object) during system-level EMC validation.
Because the exact supply voltage for this MPN was not captured in the verified data, confirm AVDD/VDD rails from the official datasheet before designing the power tree. As a general maXTouch practice, provide a clean analog rail with local decoupling at the controller, and sequence the touch controller after the display rails to avoid latching the touch front end into a noisy state during display power-up. Estimated sequencing approach: enable display rails first, then release the touch controller reset.
Compliance Information
Compliance status for this specific MPN was not captured in the verified data as of 2026-09-19. Request a material declaration from Microchip. Related mXT3432S automotive variants are documented as automotive Grade 3 qualified (-40 to +85 C).
