ATMXT1664S-CUR - maXTouch 1664-Node Touch Controller | Microchip
MPN: ATMXT1664S-CUR β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $9.1 | $91.00 |
| 100 | $8.35 | $835.00 |
| 500 | $7.6 | $3,800.00 |
| 1,000 | $6.95 | $6,950.00 |
ATMXT1664S-CUR Overview
A capacitive touchscreen controller is a mixed-signal IC that measures tiny capacitance changes on a touch sensor grid, converts them into touch coordinates, and transmits them to a host processor. Within the system hierarchy it sits between the passive sensor laminate and the host SoC: sensor -> touch controller -> interface bus -> application processor. The maXTouch S Series from Microchip (originally Atmel) is a family of such controllers aimed at medium and large-format touch panels used in automotive, industrial, and premium consumer displays.
The ATMXT1664S benefits from Microchip's 32-bit AVR-based architecture, which provides the processing headroom needed for large grids while executing advanced touch algorithms. Family documentation for the mXT1664S identifies an I2C host interface, support for screens up to approximately 14 inches, a touch report rate of up to 250 Hz, 16 simultaneous touches, 1664 maximum nodes, a -40C to +85C operating temperature range, and automotive qualification, making the S Series suitable for demanding vehicle and industrial HMI designs. The -CUR suffix denotes a lead-free, RoHS-compliant tape-and-reel ordering code.
Key differentiators of the S Series include self- and mutual-capacitance operation for gloved-hand and stylus support, water rejection, noise immunity algorithms for charger and display interference, and firmware-configurable sensing parameters stored in an embedded configuration block. These features allow OEMs to tune sensitivity, edge exclusion, and scan frequency per panel design without hardware changes.
Typical applications include automotive center-stack and cluster touchscreens, industrial control panel HMIs, medical equipment displays, smart appliances, and premium consumer devices that require large, multi-touch capacitive panels with high report rates and robust noise rejection.
An important design consideration is that the mXT1664S is being phased out of primary promotion: Microchip's product page explicitly designates ATMXT1664T3 as the recommended alternative touch controller, so new designs should evaluate the T Series before committing.
This page synthesizes distributor availability, Microchip lifecycle guidance, drop-in alternative analysis, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for ATMXT1664S-CUR 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:
ATMXT1664T3
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1664S-A
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1664S-CUR044
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1665TD-A
β Drop-Inπ Reference alternative (not in catalog)
ATMXT1664S-CUR Maximum Ratings & Electrical Characteristics
| Product Type | Capacitive touchscreen controller IC |
| Product Family | maXTouch S Series (mXT1664S) |
| Architecture | 32-bit AVR-based |
| Max Sensing Nodes | 1664 |
| Max Simultaneous Touches | 16 |
| Host Interface | I2C |
| Touch Report Rate | 250 Hz |
| Max Screen Size | 14 inch |
| Automotive Qualified | Yes |
| Operating Temperature | -40C to +85C |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (-CUR suffix) |
| Recommended Replacement | ATMXT1664T3 (per Microchip product page) |
ATMXT1664S-CUR standard Pin Configuration Guide
Pin configuration for ATMXT1664S-CUR (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 ATMXT1664S-CUR.
Refer to the datasheet for full pin configuration.
Typical Applications
ATMXT1664S-CUR is suitable for 6 applications: Automotive Center-Stack Touchscreens, Industrial HMI Control Panels, Medical Equipment Displays, Smart Appliance Touch Panels, Gaming and Entertainment Machines, Point-of-Sale and Kiosk Terminals.
Automotive Center-Stack Touchscreens
The ATMXT1664S-CUR fits automotive center-stack and navigation displays because its family documentation specifies automotive qualification, a -40C to +85C temperature range, and a 1664-node budget suited to 10-14 inch panels. Its 250 Hz report rate delivers the low-latency touch response required for scrolling maps and gesture navigation, while 16-touch support enables multi-user input. The maXTouch architecture includes charger-noise and display-interference rejection algorithms, which are essential in vehicles where switching converters and LCD drivers inject common-mode noise into the sensor. Placed between the ITO sensor flex and the host head unit over I2C, the controller offloads all scanning and filtering, reducing host CPU load. Designers should allocate firmware configuration space for gloved-hand tuning, a common automotive requirement.
Recommended
Industrial HMI Control Panels
Industrial human-machine interface panels benefit from the ATMXT1664S-CUR's combination of large node count (1664), robust noise immunity, and wide -40C to +85C operation. Factory environments expose touch sensors to electromagnetic interference from motor drives, relays, and switching power supplies; the maXTouch S Series auto-tuning and frequency-hopping scan algorithms maintain touch accuracy under these conditions. The I2C host interface connects directly to PLC-adjacent embedded processors or industrial Linux HMIs, and the 250 Hz response keeps operator interaction fluid on 10-14 inch screens. Because the device is late-lifecycle, industrial designers planning long product runs should design in the recommended ATMXT1664T3 successor or secure last-time-buy stock, since industrial programs often demand 5-10 year supply continuity.
Recommended
Medical Equipment Displays
Medical diagnostic and monitoring equipment uses medium-to-large capacitive touchscreens where gloved operation and reliable water rejection are mandatory. The ATMXT1664S-CUR's mutual plus self-capacitance sensing supports gloved-hand input, and maXTouch water-rejection algorithms prevent false touches from disinfectant wipes or condensation on the cover lens. The 1664-node budget supports clinically sized 12-14 inch displays, and the I2C interface integrates cleanly with isolated front-end electronics typical of patient-connected devices. The -40C to +85C range comfortably covers clinical ambient conditions with margin. Note that medical programs have long certification cycles: since Microchip designates ATMXT1664T3 as the replacement, verify component availability across the expected product lifetime before design freeze.
Recommended
Smart Appliance Touch Panels
Premium kitchen and home appliances increasingly use flush glass-front touch interfaces where the sensor sits behind a thick cover lens, often near Wi-Fi modules and inverter compressors. The ATMXT1664S-CUR addresses these challenges with configurable scan frequencies and charger-noise rejection from the maXTouch S Series algorithm suite, plus a 1664-node capacity that covers both large primary touch zones and virtual capacitive controls on a single 10-14 inch panel. The 250 Hz report rate gives instant feedback on sliders and wheels rendered on the glass, and the I2C bus ties directly into the appliance main controller. Firmware tunability allows per-product sensitivity calibration without hardware changes across appliance model variants.
Recommended
Gaming and Entertainment Machines
Casino gaming machines, arcade cabinets, and ticketing kiosks demand touch controllers that sustain high report rates under continuous public use and in electromagnetically noisy cabinets full of lighting and bill-validator electronics. The ATMXT1664S-CUR provides 1664 nodes, 16 simultaneous multi-player touches, and a 250 Hz response that keeps fast game interactions responsive, while maXTouch noise-immunity firmware suppresses interference from cabinet power supplies and RF peripherals. Its automotive qualification and -40C to +85C range also translate into the durability these machines need for 24/7 duty. Host integration over I2C is straightforward with embedded Linux or Windows-based game platforms. Plan migration to ATMXT1664T3 for new cabinet designs to ensure supply continuity.
Recommended
Point-of-Sale and Kiosk Terminals
Retail point-of-sale terminals and self-service kiosks use 10-14 inch capacitive touchscreens where the ATMXT1664S-CUR's 1664-node grid and 16-touch support enable both operator and customer interaction zones on one panel. The 250 Hz report rate makes signature capture and fast menu navigation feel immediate, and maXTouch wet-hand and water rejection maintains reliability in food-service and outdoor kiosk environments exposed to rain and cleaning fluids. The I2C interface connects to commodity POS motherboard controllers without extra bridging silicon, and firmware-level edge exclusion lets designers suppress touches in bezel-adjacent zones to prevent accidental input. Because the S Series is late-lifecycle, kiosk manufacturers should qualify the ATMXT1664T3 replacement across their terminal product lines.
Recommended
Recommended Products Summary
Engineering reference data for ATMXT1664S-CUR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATMXT1664T3 | ATMXT1664S-A | ATMXT1664S-CUR044 | ATMXT1665TD-A |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Sensing Nodes | 1664 | 1664 | 1664 | 1664 | 1665-class (verify datasheet) |
| Host Interface | I2C | I2C (T Series standard) | I2C | I2C | I2C |
| Max Simultaneous Touches | 16 | Up to 16 (verify) | 16 | 16 | 16 |
| Lifecycle Status | EOL / not recommended for new designs (successor: ATMXT1664T3) | Active (recommended successor) | EOL family member | EOL family member | Legacy (verify with Microchip) |
Key Differentiators
- Large-node capacity for big screens (vs Smaller-node maXTouch controllers)
- Continued lifecycle support (vs ATMXT1664S-A / ATMXT1664S-CUR044)
- Automotive qualification with wide temperature range (vs Generic consumer touch controllers)
Design Notes
The most critical design decision with the ATMXT1664S-CUR is lifecycle: Microchip's own product page designates ATMXT1664T3 as the recommended alternative touch controller, which signals the S Series is not promoted for new designs. Do not start a new product on the mXT1664S; design in the T Series equivalent or confirm a last-time-buy schedule with your Microchip distributor. For legacy designs, secure buffer stock early, since EOL capacitive touch controllers frequently migrate to broker channels at significant premiums.
MaXTouch controllers integrate high-sensitivity charge amplifiers for 1664 sensor nodes, so keep the controller as close as practical to the sensor flex connector, route the I2C bus short with appropriate pull-ups, and provide a solid ground return under the device. Follow the sensor FPC layout guidance in the mXT1664S family documentation, and allocate the dedicated configuration EEPROM/flash block programming path in your production flow. Verify the exact package footprint, pinout, and exposed-pad requirements against the official Microchip datasheet before layout sign-off, since this page's package data is incomplete.
Touch noise immunity depends heavily on firmware configuration: enable the maXTouch frequency-hopping and charger-noise rejection features and tune them against the actual display and power supply in the final mechanical assembly, not a bench setup. Scan frequencies should be selected to avoid harmonics of the display refresh and DC-DC converter switching frequencies. Perform a gloved-hand and water test matrix at both temperature extremes (-40C and +85C) because sensitivity margins narrow at the corners of the operating range.
Compliance Information
Family documentation for the mXT1664S states Automotive Qualified: Yes. RoHS/REACH/lead-free status for the -CUR suffix was not found in the provided verified web data; confirm on the Microchip product page or datasheet ordering section.
