AT42QT2120-SUR

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AT42QT2120-SUR

IC TOUCH SENSOR 12CH 20SOIC

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規格

Supplier Microchip Technology
Package Tape & Reel (TR),Cut Tape (CT)
Series QTouch™
ProductStatus Active
Type Buttons, Slider, Wheel
ProximityDetection Yes
NumberofInputs Up to 12
LEDDriverChannels Up to 10
Interface I²C
Voltage-Supply 1.8V ~ 5.5V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 20-SOIC (0.295, 7.50mm Width)

概述

Description

The AT42QT2120-SUR is Microchip/Atmel’s QT (QTouch) capacitive touch sensor controller. It provides up to 12 self-capacitance touch channels (buttons/areas) and communicates with a host MCU via an I2C‑like serial interface. Key features include configurable sensitivity and debounce, baseline tracking, auto‑calibration, and shielding/proximity options for noise immunity. The SUR suffix denotes the surface-mount package variant (compact SOIC‑style). Typical use cases are button/keypad input for consumer devices, remotes, and control panels, especially in battery-powered products due to low power operation. For exact pinout, register map, timing, and electrical specs, see the official datasheet.

Features

Here are the key features of AT42QT2120-SUR (concise):
- 12 capacitive touch channels (buttons)
- Surface-mount SUR package
- I2C serial interface (address selectable) for config and status
- Auto-calibration with drift compensation
- Mutual-capacitance sensing with shield/guard support
- Programmable thresholds, debounce, and hysteresis
- Proximity/touch detection options and event-driven interrupts
- Wake-on-touch and low-power standby modes
- Robust noise immunity and EMI rejection
- Small footprint, RoHS-compliant
Note: exact voltage range and performance specs depend on operating conditions and device configuration.

Package

AT42QT2120-SUR is supplied in an 8-pin SOIC (surface-mount) package; the “R” denotes tape-and-reel packaging for automated assembly.

Pinout

- Pin count: 20 pins (SUR package)
- Function: Capacitive touch sensor controller (QT2120) with I2C interface, supporting up to 12 touch channels (buttons) plus VDD, GND, SDA, SCL and optional IRQ.

Manufacturer

Manufacturer: Microchip Technology Inc. (the AT42QT2120 series was originally an Atmel product; Atmel was acquired by Microchip in 2016).
What kind of company: Microchip is a global semiconductor company that designs and manufactures microcontrollers, analog and mixed‑signal ICs, touch‑sensor controllers, memory and power-management devices, and embedded control solutions for industrial, automotive, consumer and communications markets.

Application

AT42QT2120-SUR is a capacitive touch keypad controller in a surface-mount package. Typical applications: capacitive touch keypads and switches in consumer electronics (TVs, set-top boxes, audio/video receivers), home appliances (microwaves, coffee makers, washing machines, HVAC panels), remote controls, control panels for equipment, and compact handheld/industrial devices.

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