Microchip Technology, Inc. 5V 5MA SSOP Interface Transceiver IC QT140-AS

The QT140-AS is a capacitive touch sensor IC designed for applications requiring touch or proximity detection. It operates on a supply voltage of 3 to 5.5V and consumes a maximum of 5mA. This device features four independent sensing channels, each capable of projecting touch fields through various dielectric materials such as glass and plastic. The sensitivity of each channel can be adjusted individually, and the device includes a continuous self-calibration feature that eliminates the need for manual adjustments over time. The QT140-AS supports toggle mode for on/off control and offers options for auto-recalibration timeouts. It incorporates Adjacent Key Suppression (AKS,Ñ¢) to minimize interference from adjacent keys, making it suitable for applications where multiple touch points are closely spaced. The device is packaged in a 28-pin SSOP format and is rated for operation in temperatures ranging from -40¬8C to +105¬8C. It is ideal for use in human interface applications, including control panels, gaming devices, and appliances, where mechanical switches are typically employed.