ATMXT1386-Z2UI - maXTouch 1386-Node Touch Controller | Microchip
MPN: ATMXT1386-Z2UI β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
ATMXT1386-Z2UI Overview
A projected-capacitive touch controller is a specialized mixed-signal interface IC that measures mutual-capacitance changes on a touch sensor grid, converts them into touch coordinates, and delivers them to a host processor over a digital interface such as I2C. Within the system hierarchy, it sits between the passive touch sensor stack and the host application processor, forming the human-machine interface (HMI) layer alongside display drivers and sensors.
Key features of the ATMXT1386 include its 1386 sensing nodes, which enable large-format touch screens with high node density, and its charge-transfer acquisition architecture that delivers strong signal-to-noise ratio for gloved-touch, wet-finger, and passive-stylus operation. The integrated 32-bit AVR microcontroller executes maXTouch algorithms on-chip, offloading touch processing from the host CPU and enabling fast report rates. On-chip self-calibration and automatic drift compensation reduce tuning effort across sensor stacks.
Technically, the multi-chip (4-chip) topology allows Microchip to scale node count beyond single-die limits: the controller chips cooperatively drive and sense the electrode matrix, making the device suited for tablets, industrial HMIs, and large touch panels where a single-node controller would be insufficient. The maXTouch firmware platform provides a common software model across the family, simplifying migration.
Typical applications include large-screen tablets and e-readers, industrial control panels requiring robust multi-touch input, and automotive-adjacent capacitive HMI designs where maXTouch noise immunity against display interference is valuable.
When designing with this part, verify the sensor stack topology and layout against the Microchip maXTouch design guidelines, since node mapping is firmware-configured; note that Microchip lists the ATMXT1066T2 as the recommended alternative touch controller for new designs.
This page synthesizes distributor pricing, cross-reference alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMXT1386-Z2UI 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 ATMXT1386-Z2UI (same form factor and footprint) β differing in Product Type, RoHS Status, Sensing Nodes.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ATMXT1386-Z2UR
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View Datasheet βATMXT1386C2XES-Z2U
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1386-U
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1386-Z2UIR
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View Datasheet βATMXT1066T2
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1386-Z2UI Maximum Ratings & Electrical Characteristics
| Touch Technology | Projected capacitive (mutual capacitance) |
| Sensing Nodes | 1386 |
| Solution Type | Multi-chip (4 chips) |
| Core | 32-bit AVR microcontroller |
| Acquisition Method | Charge transfer |
| Product Platform | maXTouch |
| Function | Touch screen sensor controller |
| Mounting Type | Surface Mount |
| Recommended Alternative | ATMXT1066T2 |
| Datasheet Document Size | 113 KB (per FindIC listing) |
ATMXT1386-Z2UI standard Pin Configuration Guide
Pin configuration for ATMXT1386-Z2UI (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 ATMXT1386-Z2UI.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT1386-Z2UI is suitable for 6 applications: Large-Format Tablet and E-Reader Touch Screens, Industrial HMI Control Panels, Interactive Digital Signage Displays, Medical Equipment Touch Interfaces, Automotive-Adjacent HMI and Control Consoles, Smart Appliance and IoT Panel Interfaces.
Large-Format Tablet and E-Reader Touch Screens
The ATMXT1386-Z2UI fits large-tablet touch panels where a single-die controller cannot cover the full electrode matrix: its 1386 nodes, delivered through a cooperative 4-chip solution, drive and sense a dense X-by-Y grid at typical tablet pitch while maintaining fast report rates via the on-chip 32-bit AVR cores. In the signal chain, the controller connects directly to the ITO sensor stack and reports touch coordinates to the application processor using the maXTouch object protocol, offloading all touch acquisition and filtering from the host CPU. Charge-transfer acquisition sustains signal-to-noise performance on large sensors where parasitic capacitance is high, and on-chip self-calibration compensates display-coupled noise, which is the dominant noise source in tablet stacks. The trade-off is a multi-chip BOM versus newer single-chip maXTouch parts such as the ATMXT1066T2, so this part suits designs whose panel geometry genuinely requires the higher node count.
Recommended
Industrial HMI Control Panels
Industrial operator panels benefit from the ATMXT1386-Z2UI's industrial-grade Z2UI ordering code and maXTouch's proven noise immunity against switching supplies, VFDs, and display inverters common in factory environments. With 1386 sensing nodes the controller serves wide-format HMI touch screens, while charge-transfer acquisition supports gloved-touch and wet-finger operation that resistive or low-grade capacitive solutions handle poorly. On-chip self-calibration and automatic drift compensation keep touch accuracy stable across wide temperature swings and aging sensor stacks, reducing field service. In deployment, the controller sits between the sensor stack and a PLC companion or HMI processor, reporting multi-touch gestures over the maXTouch protocol. Engineers should confirm the exact operating temperature range from the Microchip datasheet, since the retrieved distributor data did not enumerate it, and should budget EMI validation against the specific display stack used in the panel.
Recommended
Interactive Digital Signage Displays
Digital signage kiosks use large capacitive sensors where the ATMXT1386-Z2UI's node count covers big-format matrices without partitioning the panel into multiple touch zones. The 4-chip maXTouch solution coordinates acquisition timing across the entire electrode grid, delivering uniform touch latency across the active area - a common weak point when smaller controllers are stretched onto large sensors. The 32-bit AVR cores execute maXTouch filtering algorithms on-chip, so palm rejection and water rejection run locally and the signage host receives clean coordinate reports over the maXTouch protocol. Charge-transfer sensing maintains signal integrity alongside LED backlights and power boards that generate significant coupled noise in kiosk enclosures. For new signage designs, compare against ATMXT1066T2 first: if its 1066 nodes cover the panel at target pitch, the single-chip part reduces BOM and assembly complexity while keeping the same software platform.
Recommended
Medical Equipment Touch Interfaces
Medical devices demand touch interfaces that work reliably with gloved clinicians and tolerate aggressive disinfectant wipe-downs; the ATMXT1386-Z2UI addresses both with charge-transfer acquisition tuned for weakly-coupled (gloved) touches and maXTouch firmware supporting wet-surface rejection. Its 1386 nodes accommodate the large multi-touch canvases used on patient monitors, ultrasound consoles, and diagnostic workstations. Because touch processing runs on the integrated 32-bit AVR cores, latency stays deterministic even when the host CPU is loaded by imaging pipelines - important for UI responsiveness in clinical use. On-chip self-calibration compensates drift from sensor aging and temperature cycling in 24/7 equipment. Designers must verify the industrial-grade suffix suitability against the medical device's operating range specification in the Microchip datasheet, and validate the configuration file for glove sensitivity during system-level verification, as retrieved data did not include touch-sensitivity figures.
Recommended
Automotive-Adjacent HMI and Control Consoles
Capacitive consoles for vehicles - center stacks, climate panels, and rear-seat entertainment - are a natural maXTouch domain because the platform is engineered to reject display-inverter and switching-regulator noise characteristic of automotive electrical environments. The ATMXT1386-Z2UI's 1386 nodes serve wide or tall console sensors, and charge-transfer sensing preserves touch accuracy when the panel is driven with LED backlight PWM. Multi-touch gesture support on the 32-bit AVR cores enables swipe and pinch controls without host CPU burden. Note critically that the retrieved data does not confirm AEC-Q100 qualification for the Z2UI suffix: for qualified automotive programs, confirm the automotive maXTouch ordering grade with Microchip before design-in. If the panel fits within 1066 nodes, Microchip's recommended ATMXT1066T2 should be evaluated for better supply continuity, with migration limited to a new configuration file thanks to the shared maXTouch object protocol.
Recommended
Smart Appliance and IoT Panel Interfaces
Premium white goods and IoT control panels increasingly use full-glass capacitive interfaces; the ATMXT1386-Z2UI suits wide-format appliance HMI strips and control surfaces where its high node count allows generous electrode geometry, wide buttons, and gesture zones in one sensor. The maXTouch firmware supports water-tolerance modes important for kitchen and laundry environments where splashes and wet hands are routine, while on-chip self-calibration keeps the interface accurate across humidity and temperature cycles inside appliance enclosures. The integrated 32-bit AVR cores handle acquisition and filtering, letting a modest host MCU run the application entirely. Charge-transfer sensing resists EMI from inverter-driven motors and switching supplies that share the appliance's power domain. For smaller panels, evaluate ATMXT1066T2 to reduce the multi-chip BOM; both share the maXTouch protocol, so host driver code ports directly between them.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT1386-Z2UI β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT1386-Z2UR | ATMXT1386C2XES-Z2U | ATMXT1386-U | ATMXT1066T2 |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Sensing Nodes | 1386 | 1386 | 1386 | 1386 | 1066 |
| Solution Topology | Multi-chip (4 chips) | Multi-chip (4 chips) | Multi-chip (4 chips) | Multi-chip (4 chips) | Single-chip |
| Core | 32-bit AVR | 32-bit AVR | 32-bit AVR | 32-bit AVR | 32-bit AVR |
| Acquisition Method | Charge transfer | Charge transfer | Charge transfer | Charge transfer | Charge transfer |
| Software Platform | maXTouch object protocol | maXTouch object protocol | maXTouch object protocol | maXTouch object protocol | maXTouch object protocol |
| New-Design Recommendation Status | Not recommended for new designs (per Microchip) | Same family - verify with Microchip | Same family - verify with Microchip | Same family - verify with Microchip | Recommended alternative (per Microchip) |
Key Differentiators
- Highest node count in its maXTouch class (vs ATMXT1066T2)
- Scalable multi-chip architecture (vs ATMXT1066T2)
- Shared maXTouch software platform (vs ATMXT1066T2)
Design Notes
Microchip explicitly designates ATMXT1066T2 as the recommended alternative touch controller on the ATMXT1386 product page, which signals that the ATMXT1386 is not the preferred choice for new designs and may face future supply constraints. For a new BOM, evaluate ATMXT1066T2 first: if its 1066 nodes cover your panel's electrode matrix at the target pitch, use it and inherit the same maXTouch object protocol with no host software redesign. Reserve ATMXT1386-Z2UI for designs whose sensor geometry genuinely requires 1386 nodes, and confirm factory life-cycle status with your Microchip sales contact before committing volume production.
MaXTouch controllers are mutual-capacitance devices whose dominant noise coupling is from the display module: inverter boost converters and backlight PWM couple into the ITO sensor stack through the display glass. Route the sensor's shield and ground returns away from display power rails, follow the Microchip maXTouch sensor design guidelines for VCOM shielding and trace pitch, and configure the acquisition parameters in the maXTouch configuration object for the specific display pairing. Validate gloved-touch and wet-finger behavior at both temperature extremes during system qualification, since charge-transfer sensitivity changes with sensor parasitic capacitance.
Because the ATMXT1386 is a multi-chip (4-chip) solution, verify the exact package outline and pinout from the official Microchip package drawing before creating the PCB footprint - a verified pin table was not present in retrieved sources, so footprints should not be guessed or cloned from other maXTouch parts. Place the controller close to the sensor flex-tail connector to minimize trace length on the high-impedance sense lines, and follow the maXTouch layout guidelines for ground pours under the sensor routing. Submit the final sensor + controller configuration file through Microchip's tuning support for large panels.
Compliance Information
No explicit compliance statements for ATMXT1386-Z2UI were present in the retrieved web data. Obtain the official Microchip material declaration before export documentation.
