Infineon Technologies CYAT817AZA72-3BFBA

Overview

CYAT817AZA72-3BFBA from Infineon is an AEC-Q100 qualified automotive-grade capacitive touchscreen controller featuring a 32-bit Arm® Cortex® CPU, 72 configurable sense pins, support for 10-finger multitouch, hover sensing up to 35 mm, force touch (0.5–10 N), and low-power wake-on-touch (< 50 µA). It enables robust touch performance in automotive infotainment displays with water rejection, glove operation (≤5 mm), and dual-sense wet-finger tracking.

For engineers reviewing the CYAT817AZA72-3BFBA datasheet, CYAT817AZA72-3BFBA pinout, CYAT817AZA72-3BFBA application, or CYAT817AZA72-3BFBA equivalent, key selection criteria include its 100LD TQFP package, CAN interface capability, split-screen and free-form shape support, 250 Hz refresh rate, and integrated DSP for noise filtering in high-EMI vehicle environments.

Technical Context

This device implements a register-configurable CAPSENSE™ architecture with dual-sense capability for simultaneous TX/RX scanning, enabling water rejection and wet-finger tracking. Its 64 dedicated RX channels each integrate an ADC, supporting single-pass long-side scanning and high-frequency TX hopping (up to 300 kHz) for optimal EMI immunity.

The controller integrates a cryptographic engine for secure host communication and supports secondary I2C/SPI as master/slave (firmware-enabled) plus a dedicated CAN interface for safety-critical automotive subsystems. Force sensing uses five parallel RX channels with 0.1 N resolution and 100 µm/10 N displacement sensitivity.

Key Specifications

Pinout & Package

Package: 100-lead TQFP, 14 mm × 14 mm × 1.4 mm body, 0.5 mm pitch, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive multitouch controller applications.

Compared with CYAT817AZS72-3BFBA, this part adds CAN and haptic support for safety-critical coordination and tactile feedback; versus CYAT817AZA77-5BFBA, it trades thermal margin and pin count for smaller footprint and lower cost in cabin-mounted displays.

Availability

CYAT817AZA72-3BFBA is available at Aetrix Electronics and suitable for automotive infotainment displays, center console interfaces, and driver information clusters requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle support.

Supply support for CYAT817AZA72-3BFBA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive microcontrollers, and sensing solutions, with global R&D and manufacturing infrastructure.

This device belongs to the PSoC™ Automotive Multitouch Generation 7XL product line, designed specifically for high-reliability, EMI-resilient capacitive touch interfaces in modern vehicle cockpits and ADAS-adjacent human-machine interaction systems.

FAQ

Does CYAT817AZA72-3BFBA support both I²C and SPI host interfaces simultaneously?

Yes, it supports concurrent I²C and SPI slave operation, allowing host systems to use either interface for touch data transfer while reserving the other for firmware updates or diagnostics. Both operate independently with configurable address spaces and clock domains, and neither requires shared resources or arbitration logic.

What is the maximum electrode pitch supported for reliable 10-finger tracking?

The device supports up to 5.3 mm electrode pitch while maintaining stable 10-finger tracking and small-finger (5 mm) detection. This is validated across Manhattan and diamond sensor layouts with standard ITO patterns on glass and PET substrates, per Infineon's Gen7XL design guidelines.

Is CAN interface functionality enabled by default or firmware-configured?

The CAN interface is hardware-integrated but requires custom firmware to initialize and configure its registers, message buffers, and error-handling behavior. The datasheet confirms it is not active out-of-reset and must be explicitly enabled via the device's configuration registers before use.

How does the device handle water contamination on the touchscreen surface?

It uses dual-sense capability to acquire two independent capacitance measurements per electrode pair-one optimized for finger detection and one for water layer discrimination-enabling real-time rejection of false touches caused by moisture while preserving wet-finger tracking accuracy.