QT60645-AS

Overview

The QT60645-AS is a capacitive touch sensor integrated circuit from Microchip Technology, designed for matrix touch applications. It supports up to 64 inputs and utilizes an SPI interface for communication. The device operates within a supply voltage range of 4.75V to 5.25V, with a maximum supply current of 15mA. It features an 8-bit resolution and is rated for operation in temperatures ranging from -40°C to 105°C. The component is housed in a 44-QFP surface-mount package.

Feature Summary

• Capacitive touch sensing capability supporting up to 64 keys
• SPI interface for data transmission
• Wide operating temperature range suitable for industrial environments

Applications

• Matrix touch button interfaces
• Industrial control panels requiring capacitive input
• Consumer electronics with multi-key touch requirements

Procurement Notes

Verify the specific suffix 'AS' against the manufacturer's latest documentation to ensure correct pinout and electrical characteristics. Confirm availability status as older components may have limited stock or end-of-life implications. Request official datasheets directly from authorized distributors to validate RoHS compliance and packaging details before finalizing procurement orders.

Selection Notes

Select this component when a high-density capacitive touch solution is required with SPI connectivity. Ensure the design accommodates the 44-QFP package footprint and the specified voltage range. Consider thermal management for the -40°C to 105°C operating range if deployed in enclosed or high-temperature environments. Verify that the host microcontroller can support the SPI interface timing requirements.

Part Context

The QT60645-AS belongs to Microchip's QMatrix family of capacitive touch sensors. This series is engineered for robust touch detection in noisy environments. The part serves as a dedicated controller for large key matrices, reducing the load on the main system processor by handling touch scanning and debouncing internally.

Replacement Considerations

QT60326-ASG is listed as an equivalent or substitute part number.