ATMXT3432S-M-CCU - maXTouch Touchscreen Controller | Microchip
MPN: ATMXT3432S-M-CCU β Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMXT3432S-M-CCU Overview
A capacitive touchscreen controller is an interface IC that measures changes in capacitance across a touch sensor grid, converts those measurements into touch coordinates, and delivers them to a host processor over a standard communication bus. Within the system hierarchy, the maXTouch controller sits between the passive touch sensor (ITO film or similar) and the host MCU or application processor, functioning as a specialized mixed-signal sensor interface IC in the touch subsystem of interactive displays.
Key characteristics include the maXTouch 3432-node touchscreen controller architecture, 32-bit processing of touch data, and support for shieldless design implementations that reduce stack-up cost and thickness. The mXT3432S family enables up to 10 concurrent touches in real time with touch size reporting, and communicates via I2C or USB interfaces according to Microchip product documentation for the family.
The maXTouch architecture integrates a dedicated touch acquisition engine with embedded flash and configurable object tables, allowing host systems to tune sensitivity, gesture, and filtering parameters through firmware objects rather than external components. This reduces the bill of materials and enables self-capacitance and mutual-capacitance scanning strategies suited to larger displays where sensor parasitic capacitance is significant.
Typical applications include industrial HMI touch panels up to 17.3 inches, interactive kiosks and point-of-information terminals, and embedded displays in appliances, test equipment, and commercial control interfaces where robust multi-touch performance and ESD resilience matter.
When designing with this device, verify the package outline, supply voltage, and interface configuration directly against the manufacturer datasheet before footprint sign-off, and budget for the tuning workflow using Microchip maXTouch development tooling during panel bring-up.
This page synthesizes distributor stock listings, family cross-references, and design guidance for the ATMXT3432S-M-CCU that is not consolidated on the manufacturer product page alone.
Drop-in alternatives for ATMXT3432S-M-CCU 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-CCU (same form factor and footprint) β differing in Communication Interface, Concurrent Touches, Product Type, Touch Technology.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT3432S-M-U
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-M-CU
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-M-Z2UR
β Drop-Inβ In Stock
Contact for price
View Datasheet βATMXT3432S-S-CU
β Drop-Inβ In Stock
$4.75 / Unit
View Datasheet βATMXT3432S-M-CCU023
β Drop-Inπ Reference alternative (not in catalog)
ATMXT3432S-M-CCU Maximum Ratings & Electrical Characteristics
| Product Type | Capacitive Touchscreen Controller IC |
| Series | maXTouch mXT3432S |
| Touch Nodes | 3432 |
| Max Touchscreen Size | 17.3 inch |
| Concurrent Touches | Up to 10 (per family documentation) |
| Communication Interface | I2C / USB (family-level) |
| Processor Core | 32-bit touch processing |
| Design Support | Shieldless designs supported |
| Packaging | Tray |
| Package Code | CCU |
| Mounting Type | Surface Mount |
| Recommended Alternative Controller | ATMXT2952TD (per Microchip product page) |
ATMXT3432S-M-CCU ccu Pin Configuration Guide
Pin configuration for ATMXT3432S-M-CCU (ccu 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-CCU.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT3432S-M-CCU is suitable for 6 applications: Industrial HMI Touch Panels, Interactive Kiosks and Information Terminals, Smart Appliance Control Displays, Medical Device User Interfaces, Test and Measurement Instrument Panels, Point-of-Sale and Retail Terminals.
Industrial HMI Touch Panels
Industrial human-machine interfaces commonly use 10.1-inch to 17.3-inch projected-capacitive panels, exactly the size range the mXT3432S family is optimized for. The ATMXT3432S-M-CCU's 3432-node capacity handles dense electrode matrices typical of larger panels, while 10-touch concurrent reporting with touch size data enables glove-aware and gesture-heavy operator interactions. Shieldless design support cuts sensor stack cost in sealed industrial enclosures. Place the controller adjacent to the sensor flex tail on a short I2C run to the host MCU, and allocate one tuning cycle with maXTouch tooling to compensate for metal-bezel display noise before factory release.
Recommended
Interactive Kiosks and Information Terminals
Retail and wayfinding kiosks demand responsive multi-touch at 15-inch to 17.3-inch screen sizes with long duty cycles. The ATMXT3432S-M-CCU's real-time 10-touch reporting and touch size reporting support multi-user and gesture interactions, while maXTouch acquisition filtering maintains accuracy over reflective, noise-prone commercial displays. USB interface mode allows direct attachment to a kiosk host PC without an intermediate MCU, simplifying the electrical design. Specify a conformal-coated PCB and confirm operating temperature in the datasheet, since kiosk enclosures can exceed 60 C in sunlight-exposed installations.
Recommended
Smart Appliance Control Displays
Premium white goods and cooking appliances increasingly use 4-inch to 10-inch capacitive touch panels driven by controllers in the mXT3432S class. The ATMXT3432S-M-CCU operates with shieldless sensor stackups that meet the aggressive cost targets of appliance BOMs, and its touch-size reporting allows water-tolerant designs that reject false touches from splashes. The 3432-node capacity leaves headroom for slider and wheel electrode patterns common on cooktop and oven facades. Keep the touch controller away from inverter and relay switching sources on the PCB, and use the enable/firmware object table to implement water-rejection tuning profiles.
Recommended
Medical Device User Interfaces
Benchtop diagnostics, infusion pumps, and patient monitors use 5-inch to 15-inch touch displays where reliability and clean EMI profiles are regulated requirements. The mXT3432S family's I2C host interface integrates easily with low-EMI medical electronics, and its firmware-object tuning supports the sensitivity validation required by design controls. The controller's touch-size data lets the firmware distinguish intentional presses from accidental contact, useful near alarms. Use the ATMXT3432S-M-CCU behind a glass-film-film stack, route I2C as a short guarded bus, and verify the device temperature range against sterilization-adjacent thermal environments in the datasheet.
Recommended
Test and Measurement Instrument Panels
Bench instruments and handheld analyzers benefit from capacitive multi-touch for zoomable waveform and spectrum views on 7-inch to 17.3-inch displays. The ATMXT3432S-M-CCU's 10-touch support enables pinch-zoom interactions, and the shieldless-design capability reduces front-glass lamination cost in volume production. Because test instruments contain switching power supplies, the controller's noise rejection should be validated during panel tuning with the instrument's own DC-DC converters active. Mount the controller near the display tail, keep the I2C or USB trace length under 10 cm where possible, and follow Microchip's maXTouch design guide for ground stitching around the sensor.
Recommended
Point-of-Sale and Retail Terminals
POS terminals and payment peripherals use compact capacitive touchscreens where the mXT3432S family's 17.3-inch ceiling covers even the largest countertop units. The ATMXT3432S-M-CCU delivers 10-touch reporting for signature capture and menu navigation, and USB interface mode connects directly to retail host boards. Its 3432-node capacity supports small-strip signature panels and larger customer displays from one controller platform, reducing qualification effort across product lines. For payment applications, confirm the datasheet's security and EMC documentation against PCI-relevant system requirements, and prefer franchised distributors to guarantee traceable, original Microchip silicon.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT3432S-M-CCU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT3432S-M-U | ATMXT3432S-M-CU | ATMXT3432S-M-Z2UR | ATMXT3432S-S-CU | ATMXT3432S-M-CCU023 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology (Atmel) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Touch Controller Family | maXTouch mXT3432S | maXTouch mXT3432S - same | maXTouch mXT3432S - same | maXTouch mXT3432S - same | maXTouch mXT3432S - same | maXTouch mXT3432S - same |
| Touch Nodes | 3432 | 3432 | 3432 | 3432 | 3432 | 3432 |
| Max Screen Size | 17.3 inch | 17.3 inch | 17.3 inch | 17.3 inch | 17.3 inch | 17.3 inch |
| Interfaces | I2C / USB (family) | I2C / USB (family) | I2C / USB (family) | I2C / USB (family) | I2C / USB (family) | I2C / USB (family) |
Key Differentiators
- Large-panel coverage on one controller platform (vs ATMXT3432S-M-CU)
- Shieldless design support cuts BOM cost (vs ATMXT2952TD)
- Broad multi-source availability today (vs ATMXT3432S-M-CCU023)
Design Notes
Place the ATMXT3432S-M-CCU as close as possible to the touch sensor flex tail connector. Keep the I2C bus (or USB differential pair) shorter than 10 cm and route I2C away from switching regulator nodes; maXTouch controllers perform microvolt-level capacitance sensing, so ground stitching vias along the sensor interface significantly improve signal integrity. Follow Microchip's maXTouch hardware design guide for the recommended 0.1 uF VDD decoupling placement adjacent to each supply pin.
Do not assume suffix interchangeability without checking the datasheet ordering table: the CCU, CU, U, Z2UR, and S-CU suffixes of the mXT3432S encode package, packing, and possibly grade options. Swapping a suffix with a different package outline or moisture-sensitivity level can invalidate the PCB footprint and reflow profile. Verify the exact mechanical drawing and MSL before qualifying a substitute, and record the verified suffix in your AVL.
Budget panel-level tuning time during bring-up: maXTouch controllers require tuning with the final display, cover lens, and enclosure stack installed, because display noise and bezel grounding shift the mutual-capacitance baseline. Perform tuning with the actual host processor running, since its clock spurs appear in the acquisition spectrum. The controller's firmware object table (accessed over I2C) stores the final tuning profile, so version-control the configuration file like firmware.
Compliance Information
Compliance status not stated in the provided web data. Verify RoHS/REACH declarations on the Microchip product page or via Microchip's environmental documentation portal before procurement.
