ATMXT112S-MAUR - 112-Node maXTouch Touch Controller | Microchip
MPN: ATMXT112S-MAUR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.25 | $1.25 |
| 10 | $1.25 | $12.50 |
| 100 | $1.19 | $119.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $1.06 | $1,060.00 |
ATMXT112S-MAUR Overview
A capacitive touch controller is a mixed-signal IC that measures tiny capacitance changes on a touch sensor grid, converts them into touch coordinates, and communicates them to a host processor. In the system hierarchy, a touchscreen controller sits between the touch sensor (ITO pattern on glass or film) and the host MCU or application processor, forming part of the human-machine interface subsystem alongside display drivers and haptic feedback devices.
Key features of the ATMXT112S-MAUR include its 112-node sensing matrix for dense electrode layouts, the maXTouch S-Series architecture optimized for small displays up to 3.5 inches, and an advanced noise mitigation system that rejects interference from display drivers and chargers. The device integrates acquisition logic and post-processing, offloading touch detection from the host CPU.
Technically, the maXTouch S-Series uses a proprietary acquisition engine with mutual-capacitance scanning and built-in self-calibration. Configuration data is stored on-chip in nonvolatile memory, and communication with the host uses an I2C-compatible interface. The device supports moisture and gloved-finger handling modes and provides robust reporting rates for responsive user interfaces.
Typical applications include feature phone touchscreens, handheld game consoles, digital still cameras, portable GPS navigation devices, and small industrial HMI panels. Any battery-powered product with a 3.5-inch or smaller capacitive display benefits from the low-power touch wake-up and high noise immunity.
Design consideration: because touch performance depends strongly on the sensor pattern and panel stack-up, use Microchip's maXTouch configuration tooling and reference sensor designs; improper grounding near display VCOM lines is the most common source of false touches.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMXT112S-MAUR 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 ATMXT112S-MAUR (same form factor and footprint) β differing in Manufacturer, Max Screen Size, Noise Mitigation, Sensing Technology.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT112S-MAUR024
β Drop-Inπ Reference alternative (not in catalog)
ATMXT112S-MAUR021
β Drop-Inπ Reference alternative (not in catalog)
ATMXT112S-MAUR013
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMXT112S-MAUR Specifications
| Product Type | Capacitive Touchscreen Controller |
| Family | maXTouch S-Series (mXT112S) |
| Touch Sensing Nodes | 112 |
| Sensing Technology | Mutual capacitance (projected capacitive) |
| Max Screen Size | 3.5 inch |
| Interface | I2C-compatible |
| Noise Mitigation | Integrated advanced noise mitigation system |
| Configuration Memory | On-chip nonvolatile memory |
| Package | 32-UQFN (4x4 mm) |
| Mounting Type | Surface Mount |
| Packaging | Reel (TR) |
| Status | Active |
ATMXT112S-MAUR 32-uqfn (4x4 mm) Pin Configuration Guide
Pin configuration for ATMXT112S-MAUR (32-uqfn (4x4 mm) 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 ATMXT112S-MAUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT112S-MAUR is suitable for 6 applications: Feature Phone Touchscreens, Handheld Game Consoles, Digital Still Cameras, Portable GPS Navigation Devices, Small Industrial HMI Panels, POS and Handheld Terminals.
Feature Phone Touchscreens
The ATMXT112S-MAUR is purpose-built for feature phone displays up to 3.5 inches, where its 112 mutual-capacitance nodes resolve dense ITO electrode patterns at smartphone-like responsiveness. The on-chip acquisition engine and post-processing offload touch detection entirely from the host baseband processor, reporting coordinates over I2C at rates suitable for smooth gesture tracking. Its integrated noise mitigation rejects interference from LCD drivers and charging circuits typical of handsets. Placed directly behind the sensor with short sensor traces and a solid ground reference, the device supports multi-touch gestures, moisture rejection, and gloved-finger operation, enabling a modern user experience in cost-sensitive handsets.
Recommended
Handheld Game Consoles
Portable game consoles demand fast, accurate multi-touch with low latency; the ATMXT112S-MAUR delivers this with its 112-node matrix scan and S-Series reporting pipeline, giving end users a smartphone-like interface as stated by Microchip. The controller's built-in self-calibration adapts to varying panel stack-ups across production units, while its noise mitigation system keeps touch tracking stable near backlight inverters and wireless modules. Connected to the console's application processor via I2C with interrupt signaling, it supports simultaneous multi-finger input for gameplay. Its compact 32-UQFN (4x4 mm) package fits the tight PCB real estate typical of handheld gaming hardware.
Recommended
Digital Still Cameras
Digital still cameras benefit from the ATMXT112S-MAUR's 112-node capacitive sensing on 3.5-inch or smaller LCD touch panels, enabling tap-to-focus and gesture menus. The device's low-power acquisition modes conserve battery life, an essential criterion in camera products, while its noise immunity maintains reliable touch detection adjacent to the camera's display driver and image-processing SoC. Configuration stored in on-chip nonvolatile memory simplifies manufacturing because no external configuration host is required at power-up. Designers should route sensor lines away from the image sensor and flash charge circuitry, leveraging the controller's shielding and filtering options documented in the maXTouch configuration guidance.
Recommended
Portable GPS Navigation Devices
GPS navigation units are listed by Microchip as a primary target for the mXT112S: the ATMXT112S-MAUR provides 112 sensing nodes and robust noise mitigation, which is critical because GNSS receivers are sensitive to digital noise and touch scanning must coexist with the navigation display. The controller reports stable coordinates over I2C even when the device is sunlit, warm, or powered from a noisy automotive charger, thanks to its adaptive filtering. Its 32-UQFN (4x4 mm) surface-mount package suits the compact, thermally constrained boards of PND hardware, and gloved-finger support matches outdoor usage scenarios of motorcycle and marine GPS products.
Recommended
Small Industrial HMI Panels
Compact industrial human-machine interface panels with 3.5-inch capacitive touchscreens can use the ATMXT112S-MAUR as the touch front end ahead of an MCU such as the ATMEGA64M1 family. The controller's 112 nodes support fine-grained button and slider regions, while integrated noise mitigation ensures reliable operation near motor drives, relays, and switching power supplies common on factory floors. Its self-calibrating acquisition and on-chip configuration memory eliminate host-side touch tuning, shortening commissioning time. Designers should provide a clean analog supply, solid ground plane, and shielded sensor traces per the maXTouch layout guidance to achieve EMI robustness consistent with industrial environments.
Recommended
POS and Handheld Terminals
Point-of-sale terminals and handheld data-collection devices use small capacitive displays where the ATMXT112S-MAUR's 112-node matrix and moisture rejection deliver dependable touch input for payment and inventory workflows. The I2C host interface integrates cleanly with payment SoCs, and the controller's interrupt-driven reporting minimizes host polling overhead, extending battery life in mobile terminals. Its noise mitigation handles interference from thermal printer motors, wireless radios, and charging docks. The 32-UQFN (4x4 mm) package with tape-and-reel delivery supports automated high-volume assembly, and firmware-suffix variants allow OEMs to standardize on one footprint across multiple product configurations.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT112S-MAUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT112S-MAUR024 | ATMXT112S-MAUR021 | ATMXT112S-MAUR013 |
|---|---|---|---|---|
| Package | 32-UQFN (4x4 mm) | 32-UQFN (4x4 mm) - same | 32-UQFN (4x4 mm) - same | 32-UQFN (4x4 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Touch Sensing Nodes | 112 | 112 | 112 | 112 |
| Family / Architecture | maXTouch S-Series (mXT112S) | maXTouch S-Series (mXT112S) | maXTouch S-Series (mXT112S) | maXTouch S-Series (mXT112S) |
| Host Interface | I2C-compatible | I2C-compatible | I2C-compatible | I2C-compatible |
| Max Screen Size | 3.5 inch | 3.5 inch | 3.5 inch | 3.5 inch |
| Factory Firmware Suffix | MA (base) | 024 variant | 021 variant | 013 variant |
Key Differentiators
- Official long-term path: Microchip-designated successor (vs ATMXT144U)
- 112-node matrix in a compact 32-UQFN (4x4 mm) (vs ATMXT112S-MAUR024)
- Integrated noise mitigation system (vs ATMXT112S-MAUR021)
Design Notes
Route sensor transmit/receive traces as short, matched, and away from display VCOM and switching-regulator nodes. The ATMXT112S-MAUR's noise mitigation compensates for moderate display noise, but layout quality still dominates baseline SNR: use a solid ground plane under the sensor flex/PCB, keep sensor traces on inner layers with ground guard where possible, and follow Microchip's maXTouch sensor design guidance for trace pitch and shielding. Provide the recommended decoupling on the analog supply pin directly at the 32-UQFN pads with a low-ESR ceramic capacitor.
Firmware/configuration suffixes matter: ATMXT112S-MAUR, -MAUR024, and -MAUR021 are the same die but may ship with different factory configurations, which changes sensitivity thresholds and reporting behavior. When substituting, verify the embedded configuration matches your sensor pattern, or plan to reflash configuration via the I2C interface using Microchip's maXTouch tooling. Also confirm the I2C address does not conflict with other devices on the bus, and power up the touch controller before or together with the display to avoid spurious touch reports during panel settle.
Estimated: for battery products, enable the controller's low-power doze/deep-sleep scanning between touches; the dominant average current is set by the scanning duty cycle rather than the core supply. Keep the analog supply separated from display LED boost converters, since touch threshold drift under supply ripple is the most common field complaint in small handheld designs. Use a dedicated LDO or ferrite bead filter if the touch controller shares a rail with the display driver, and measure noise at the controller's supply pin under full display brightness during validation.
Compliance Information
Compliance details not explicitly stated in provided web data; Microchip generally ships RoHS-compliant commercial parts, but confirm on the official product page before production.
