ATMXT768E-ABR - maXTouch Touchscreen Controller | Microchip
MPN: ATMXT768E-ABR β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.9 | $79.00 |
| 100 | $7.2 | $720.00 |
| 500 | $6.7 | $3,350.00 |
| 1,000 | $6.3 | $6,300.00 |
ATMXT768E-ABR Overview
A projected-capacitive (PCAP) touchscreen controller is a specialized mixed-signal IC that drives excitation signals across rows and columns of a transparent ITO sensor grid and measures mutual capacitance changes at each intersection. Within the system hierarchy, it sits between the raw touch sensor laminate and the host processor, delivering pre-processed touch coordinates over a digital interface. This class of device is fundamental to modern human-machine interface (HMI) design in industrial, medical, and consumer equipment.
Key characteristics of the mXT768E-AT include high responsiveness for large-format screens, support for multi-touch reporting, and Microchip's maXTouch object-based reporting architecture in which touch data is conveyed as structured objects over an I2C or SPI-compatible host interface. The device is firmware-configurable, allowing tuning of sensitivity, rejection thresholds, and gesture behavior to match specific sensor stacks.
The ATMXT768E-ABR was originally targeted at tablets, industrial HMI panels, point-of-sale terminals, and medical monitors in the 7-inch to 10.1-inch class. Note that Microchip's product page indicates this part is no longer recommended for new designs and recommends the ATMXT1189TD-A as the alternative touch controller for new development.
Design consideration: because the mXT768E-AT is in end-of-life transition, new designs should evaluate the ATMXT1189TD-A and verify firmware migration effort, sensor-stack compatibility, and pin mapping before committing to a layout.
This page synthesizes distributor availability, cross-reference data, lifecycle status, and practical design notes not found in the manufacturer datasheet alone, helping engineers make a supply-risk-aware selection decision.
Drop-in alternatives for ATMXT768E-ABR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT1189TD-A
β Drop-Inπ Reference alternative (not in catalog)
ATMXT768T-AT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
ATMXT799T-AT
β Drop-Inπ Reference alternative (not in catalog)
ATMXT641TH-ATR
β Drop-Inπ Reference alternative (not in catalog)
ATMXT768E-ABR Specifications
| Product Type | Mutual-capacitance touchscreen controller |
| Product Family | maXTouch mXT768E-AT |
| Max Screen Diagonal | 10.1 inch and larger |
| Sensing Technology | Projected capacitive (mutual capacitance) |
| Manufacturer | Microchip Technology |
| Lifecycle Status | End-of-life; recommended alternative ATMXT1189TD-A |
| Mounting Type | Surface Mount |
ATMXT768E-ABR standard Pin Configuration Guide
Pin configuration for ATMXT768E-ABR (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 ATMXT768E-ABR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT768E-ABR is suitable for 6 applications: Industrial HMI Touch Panels, Point-of-Sale Terminals, Medical Monitoring Displays, Tablet and Portable Devices, Automotive Center-Stack Displays, Smart Appliance and IoT Control Panels.
Industrial HMI Touch Panels
Industrial human-machine interface panels in the 7-inch to 10.1-inch class are a primary application for the ATMXT768E-ABR. The mXT768E-AT's mutual-capacitance architecture with configurable rejection thresholds reliably rejects electromagnetic interference from motors, inverters, and switching supplies typical on factory floors, while maXTouch object-based reporting gives host controllers clean, structured touch data. Placed directly on the flex tail of the touch sensor laminate, the controller drives the TX/RX grid and reports coordinates over a digital host interface, supporting gloved-hand and wet-touch operation after tuning. Because the part is end-of-life, retrofit programs should qualify the ATMXT1189TD-A for future builds while using residual ATMXT768E-ABR stock to sustain in-service units.
Recommended
Point-of-Sale Terminals
Point-of-sale and self-service kiosk terminals frequently use 7-inch to 10.1-inch projected-capacitive touchscreens, exactly the size class the ATMXT768E-ABR was designed for. The mXT768E-AT's high responsiveness delivers the low-latency touch feedback customers expect at checkout counters, and its multi-touch reporting supports pinch-zoom on receipt previews and signature capture. The controller mounts on the display assembly flex or PCB and reports over a digital interface to the terminal's main SoC, with noise immunity tuned against the display's inverter interference. Service organizations maintaining legacy POS fleets can source ATMXT768E-ABR from excess inventory channels; new POS designs should adopt the ATMXT1189TD-A to guarantee supply continuity.
Recommended
Medical Monitoring Displays
Medical monitors and bedside diagnostic displays in the 10-inch class benefit from the ATMXT768E-ABR's stable, low-drift capacitive sensing and configurable wet/gloved-touch handling, which matters when surfaces are disinfected or operated with nitrile gloves. The controller's object-based architecture lets the host application distinguish finger taps from palm rejection events, reducing accidental input on clinical interfaces. Mounted on the display's touch flex circuit, it senses through cover glass thicknesses typical of medical bezels and maintains tracking accuracy under the low-level RF environment of hospital equipment. Because the device is EOL, medical device manufacturers must implement last-time-buy strategies or requalify the ATMXT1189TD-A through their change-control process.
Recommended
Tablet and Portable Devices
The ATMXT768E-ABR was originally designed for tablet-class devices with touchscreens up to 10.1 inches or larger, where its highly responsive mutual-capacitance sensing and multi-touch support met consumer expectations for scrolling, pinch-zoom, and on-screen keyboards. The controller integrates signal acquisition and touch decision on-chip, offloading the application processor and reducing overall system power compared to host-based touch processing. Its configurable firmware adapts to varied sensor stacks and cover lens materials used across tablet generations. Repair and refurbishment channels for legacy tablets remain the main current use; any tablet platform refresh should move to the ATMXT1189TD-A or a current-generation controller given the mXT768E-AT's end-of-life status.
Recommended
Automotive Center-Stack Displays
maXTouch controllers of this size class have been used in automotive infotainment and center-stack touchscreens around 10 inches, where the controller must reject interference from display backlights, CAN traffic, and inverter noise inside the vehicle EMC profile. The ATMXT768E-ABR's configurable threshold and rejection objects allow tuning against these noisy environments, and its object-based reporting integrates cleanly with automotive HMI stacks. Placed on the touchscreen module PCB, it reports multi-touch gestures such as swipe and two-finger zoom used in navigation applications. Note this specific ordering variant is not automotive-qualified; automotive programs must verify AEC-Q100 grade variants or migrate to the ATMXT1189TD family for current sourcing.
Recommended
Smart Appliance and IoT Control Panels
Smart appliances, thermostats, and connected-home control panels in the 7-inch to 10-inch range use projected-capacitive touchscreens driven by controllers like the ATMXT768E-ABR. The controller's ability to operate through thick cover glass and its wet-touch tolerance suit kitchen and laundry environments where surfaces are damp or greasy. Its integrated touch-decision logic reduces the processing burden on cost-sensitive appliance MCUs, reporting discrete touch objects over a simple digital interface. Firmware-configurable sensitivity allows one controller design to span multiple appliance models with different sensor laminations. Given end-of-life status, appliance makers standardizing on this footprint should validate the ATMXT1189TD-A on their sensor stack before the next production cycle.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT768E-ABR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT1189TD-A | ATMXT768T-AT | ATMXT799T-AT |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Lifecycle Status | EOL (NRND) | Active | EOL | EOL |
| Sensing Technology | Mutual capacitance (maXTouch) | Mutual capacitance (maXTouch) | Mutual capacitance (maXTouch) | Mutual capacitance (maXTouch) |
| Firmware Architecture | maXTouch object-based reporting | maXTouch object-based (newer generation) | maXTouch object-based (same generation) | maXTouch object-based |
| New Design Recommended | No | Yes | No | No |
Key Differentiators
- Large-screen support in its generation (vs ATMXT768T-AT)
- Actively manufactured successor available (vs ATMXT1189TD-A)
- Established legacy ecosystem (vs ATMXT799T-AT)
Design Notes
The ATMXT768E-ABR is end-of-life: Microchip's product page explicitly names the ATMXT1189TD-A as the recommended alternative touch controller. Do not select this part for new designs. For sustaining production, implement a last-time-buy sized to your forecast plus yield attrition (typically 5-10% over program life), qualify your broker stock (date codes, counterfeit screening), and begin ATMXT1189TD-A requalification in parallel rather than waiting for stock exhaustion.
maXTouch controllers are noise-sensitive mixed-signal devices: place the controller as close to the touch sensor flex connector as possible, keep the analog supply and sensor drive traces away from display backlight and switching-regulator loops, and follow the manufacturer's touch sensor layout guidelines for ground stitching between TX/RX regions. Verify the sensor stack (cover glass thickness, adhesive, lamination) matches the firmware tuning configuration, since mismatched stacks are the leading cause of ghost-touch and jitter complaints in the field.
On migration to the ATMXT1189TD-A, budget engineering time for full touch re-tuning: the newer maXTouch firmware generation uses different configuration objects, so parameters cannot be copied directly from mXT768E tuning files. Plan a regression test set covering gloved touch, wet touch, large-palm rejection, EMC immunity near the display backlight, and gesture latency. Allocate several weeks including EMC chamber time; treat the migration as a new sensor qualification, not a drop-in firmware swap.
Compliance Information
Compliance data not present in the provided web data. Verify RoHS/REACH status on the Microchip product page or datasheet for the specific date code before procurement.
