ATMXT1664S1-CU

ATMXT1664S1-CU is a maXTouch capacitive touch controller from Atmel (now Microchip). It is a 16-channel device designed to sense capacitive touch inputs (buttons, sliders, wheels) on touch panels. The on‑chip processing provides robust touch detection (and, in some variants, multi‑touch) and it communicates with a host microcontroller via I2C, with an interrupt line to signal events. The -CU suffix indicates a specific package/revision; check the datasheet for exact form factor and pinout. Typical uses include smartphone/tablet panels, consumer devices, wearables, and any UI that uses capacitive keys or sliders. For exact electrical characteristics, register maps, timing, and integration details, refer to the ATMXT1664S1-CU datasheet and Microchip/Atmel support resources.

ATMXT1664S1-CU features (concise):
- 16-channel capacitive touch sensing (self- and mutual-capacitance modes)
- I2C serial interface for config and status
- Programmable thresholds, sensitivity, debounce, and hold time
- Baseline tracking with noise filtering for robust sensing
- Auto-calibration and built-in self-diagnostics
- Water/dust/EMI tolerance suitable for harsh environments
- Low-power modes with wake-on-touch
- Flexible interrupt/status reporting and event generation
- Configurable scan rate and channel setup
- Small footprint Cu package option (S1-CU)

Pin count: 28 pins (QFN-28 package).
Function: ATMXT1664S1-CU is a 16-channel capacitive touch sensor controller (MXT family) from Atmel/Microchip. It provides a front-end for 16 touch electrodes and communicates with a host MCU via I2C (with an interrupt pin for events).

Manufacturer: Atmel Corporation (maXTouch family). Atmel is a semiconductor company that designs and manufactures integrated circuits such as microcontrollers, memory, and touch-sensor/controllers. It was acquired by Microchip Technology in 2016 and now operates as Microchip’s Atmel division.

ATMXT1664S1-CU is a 16-channel capacitive touch sensor/controller. Typical application areas:
- Capacitve touch sensing for keypad/button/slider interfaces
- Consumer electronics: remotes, audio/video devices, set-top boxes
- Home appliances: microwaves, washing machines, dishwashers, coffee makers
- Automotive HMI: dashboards, climate/control panels
- Industrial equipment: control panels and instrumentation
- Medical devices and health tech with touch input panels
These use cases leverage its multi‑channel, low‑power capacitive sensing and I/O capabilities for tactile UI.

MXT1664S1-CU is in a 28-pin QFN (Cu) package, 6.0×6.0 mm footprint with an exposed pad.