ATMXT3432S-S-CUR - maXTouch Touch Controller | Microchip
MPN: ATMXT3432S-S-CUR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.62 | $36.20 |
| 100 | $3.25 | $325.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.68 | $2,680.00 |
ATMXT3432S-S-CUR Overview
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.
Drop-in alternatives for ATMXT3432S-S-CUR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesATMXT3432S-S-CUR Maximum Ratings & Electrical Characteristics
| Product Family | maXTouch mXT3432S |
| Function | Projected capacitive touchscreen controller (Slave IC) |
| Touch Technology | Mutual-capacitance projected capacitive |
| Maximum Screen Size | 17.3 in |
| Shieldless Design Support | Yes |
| Package Type | BGA |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T&R) |
| RoHS Status | Compliant |
| Lifecycle Status | Active; recommended alternative touch controller: ATMXT2952TD |
ATMXT3432S-S-CUR bga Pin Configuration Guide
Pin configuration for ATMXT3432S-S-CUR (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-CUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT3432S-S-CUR is suitable for 6 applications: Tablet and Notebook Touchscreens, Industrial HMI Touch Panels, Smart Appliance Displays, Point-of-Sale Terminals, Automotive-Adjacent Infotainment Development, Medical Device Control Displays.
Tablet and Notebook Touchscreens
Medium-format consumer computing displays in the 10-to-17.3-inch class are the core design space of the mXT3432S. The controller's channel count supports the high node density these panels require, while its shieldless-design capability removes the shield electrode from the OCA/ITO stack, cutting module cost by roughly one layer and reducing total thickness. Placed on the flexible PCB at the panel edge, it acquires mutual-capacitance frames and streams touch reports to the application host over its host interface, with noise-immunity algorithms compensating for LCD coupling. Design-in effort centers on configuration tuning for cover-glass thickness and display noise rather than firmware development.
Recommended
Industrial HMI Touch Panels
Factory and machine-interface touch panels benefit from the ATMXT3432S-S-CUR's industrial temperature grading and shieldless stack, which simplifies enclosure glass lamination. The maXTouch object model allows per-project tuning of touch thresholds, so panels with thick protective glass or gloved operation remain usable without hardware changes. Typical deployment places the controller behind 2-to-4 mm cover glass on a 10-to-17-inch sensor; the reported touch data feeds a PLC companion or embedded Linux host. Because industrial displays can have higher EMI environments, a grounding and display-noise review during design-in is recommended, and the controller's acquisition filters handle most residual noise.
Recommended
Smart Appliance Displays
White-goods and smart-home appliances increasingly replace mechanical buttons with glass-front touch panels up to 17.3 inches. The ATMXT3432S-S-CUR fits because its shieldless design tolerates the laminate stack costs typical in appliance manufacturing, and its wet-finger handling suits kitchen environments. The controller reports touch coordinates to the appliance MCU, and gesture objects can implement swipe-to-wake behavior directly in silicon. Power sequencing is simple, and the industrial grade covers appliance interior temperatures. Validation should include operation with condensation on the glass surface and adjacent motor/inverter noise sources common in appliances.
Recommended
Point-of-Sale Terminals
Retail POS touch terminals in the 10-to-15-inch range use the ATMXT3432S-S-CUR for durable glass-front input. The controller's linearity and filtering maintain accurate input across the full panel even with screen protectors applied, a common POS requirement. Its shieldless stack-up reduces module cost at the volumes typical of POS fleets. The device streams reports to the POS system-on-module; configuration objects allow calibration for curved or bezeled glass installations. Multi-touch support enables pinch-zoom on modern retail applications. Long-term availability planning should note Microchip's designated ATMXT2952TD migration path for fleet refresh cycles.
Recommended
Automotive-Adjacent Infotainment Development
Development and Tier-2 display modules destined for vehicle HMI platforms use the mXT3432S in non-safety infotainment touch layers. Its shieldless operation survives automotive display grounding schemes when the noise-immunity configuration is tuned to the vehicle's display panel, and the 17.3-inch ceiling covers center-stack and passenger displays. Note that this specific ordering code is the standard industrial grade; automotive-grade qualification must be confirmed on the corresponding Microchip ordering part before use in production vehicles. Development with maXTouch configuration tooling shortens tuning cycles across display variants.
Recommended
Medical Device Control Displays
Benchtop medical instruments and patient monitors in the sub-17-inch class use the ATMXT3432S-S-CUR for sealed glass-front interfaces that withstand disinfectant wiping. Shieldless lamination supports full-front glass with no venting holes, important for infection control. Gloved-touch configuration objects allow operation with nitrile examination gloves, a daily clinical requirement. The controller reports to the instrument's main compute module while a housekeeping MCU manages alarms and indicators. Regulatory teams should document the touch subsystem's failure behavior and confirm component change notification registration with Microchip for the medical device file.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT3432S-S-CUR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT2952TD-S6U | ATMXT3432S-S-CUR022 | ATMXT1664S-S-CUR |
|---|---|---|---|---|
| Package | BGA | BGA | BGA | BGA |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Manufacturer Recommendation | Primary device | Official recommended alternative | Same die variant | Family alternative |
| Packaging | Tape & Reel | Tape & Reel | Tape & Reel | Tape & Reel |
| Configuration Porting Required | N/A (baseline) | Yes (family migration) | No (same die) | Yes (channel remap) |
Key Differentiators
- 17.3-inch screen coverage with shieldless stack (vs ATMXT1664S-S-CUR)
- Documented forward migration path (vs ATMXT2952TD-S6U)
- Tape-and-reel SMT readiness (vs ATMXT3432S-S-CU)
Design Notes
Do not assume the ATMXT2952TD is a direct drop-in despite being Microchip's recommended alternative. The recommendation applies at the application-family level; verify BGA footprint and ball map against your PCB, then port the maXTouch configuration objects and re-run touchscreen validation (SNR, linearity, gloved and wet-finger tests). Budget two to four weeks for the migration validation cycle on a 17-inch class panel.
Shieldless operation makes the touch system sensitive to grounding and display coupling. Route the sensor flex away from LCD driver lines, provide a low-impedance ground return between the touch controller ground and the display chassis ground, and follow the maXTouch layout guidance in the family datasheet for BGA fan-out and sensor trace shielding rules. During design-in, perform a display-noise scan across all LCD grayscale levels before locking the configuration file.
Estimated: touch acquisition current is pulsed at the report rate, so size the local decoupling (typically a bulk capacitor plus ceramics at the BGA supply balls) to hold supply ripple within the datasheet limit during burst acquisition. Exact supply voltage and current figures must be taken from the current mXT3432S family datasheet, as they were not available in the verified data for this page; do not finalize the power tree from secondary distributor listings.
Compliance Information
RoHS compliance per standard Microchip production status as listed by authorized distributors; confirm per-lot certificate of conformance. Automotive qualification must be verified on the applicable Microchip ordering code before automotive use.
