ATMXT640UC4U Microchip Integrated Circuit (BGA) In Stock
Microchip ATMXT640UC4U is a 32-bit MaxTouch touchscreen controller IC with 640 sensing channels supporting large multi-touch display panels in a BGA package. Delivers low-noise capacitive sensing with on-chip firmware for gesture recognition and palm rejection. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Microchip
- Package
- BGA
- Pin Count
- 88
- Lifecycle
- ACTIVE
- Datasheet
- ATMXT640UC4U Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 640 capacitive sensing channels enabling high-resolution multi-touch detection on large touchscreen panels up to 15 inches
- 32-bit processing core with on-chip firmware supporting 10-finger simultaneous touch tracking and gesture recognition
- Advanced noise immunity algorithms rejecting interference from LCD noise and stylus inputs at display scan frequencies above 60 Hz
- BGA package with fine-pitch ball array minimizing PCB footprint for slim bezel tablet and industrial HMI designs
Applications
The ATMXT640UC4U is designed for large-format touchscreen panels in industrial HMI displays, automotive infotainment screens, and commercial kiosks where 640 sensing channels provide the resolution needed to detect fine finger movements across a 10-inch to 15-inch projected capacitive touch panel. Its 32-bit MaxTouch architecture enables glove-touch detection and water rejection, making it suitable for outdoor interactive displays and factory floor touchscreens exposed to moisture and contaminants. The I2C and SPI host interfaces allow straightforward integration with application processors running Linux or Android touch subsystems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many simultaneous touch inputs and sensing channels does the ATMXT640UC4U support?
The ATMXT640UC4U supports up to 10 simultaneous finger touches tracked across 640 capacitive sensing channels, enabling high-resolution touch position reporting on large displays. The 640-channel architecture provides fine spatial resolution suitable for panels up to 15 inches diagonal with X-Y touch accuracy below 1 mm.
How does the ATMXT640UC4U handle LCD noise interference in embedded display designs?
Microchip MaxTouch ICs including the ATMXT640UC4U use adaptive noise rejection firmware that synchronizes touch sampling to the LCD panel's vertical sync signal (typically 60 Hz to 120 Hz refresh rate), suppressing in-band interference by more than 40 dB. This allows reliable touch detection even when the controller is mounted directly adjacent to high-noise IPS or OLED display drivers.
Which host interface does the ATMXT640UC4U use to communicate with an application processor?
The ATMXT640UC4U communicates via I2C at speeds up to 400 kHz or SPI at up to 10 MHz, selectable by hardware pin strapping during power-up. The I2C interface uses a standard 7-bit address, while the SPI interface provides faster burst data transfer useful in applications requiring sub-10 ms touch report latency for gaming or industrial HMI screens operating at 3.3 V logic levels.
In which display size and application segments is the ATMXT640UC4U preferred over lower-channel MaxTouch variants?
The 640-channel ATMXT640UC4U is preferred for display panels above 10 inches diagonal where lower-channel variants (such as 256-channel or 336-channel MaxTouch ICs) cannot provide adequate spatial sampling density. It is particularly suited to 12-inch to 15-inch industrial HMI panels, all-in-one POS terminals, and automotive center stack displays requiring 10-finger multi-touch at full 1080p panel resolution.
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