Infineon Technologies CYAT817AZA77-5BFBA

Overview

CYAT817AZA77-5BFBA from Infineon is an AEC-Q100 qualified automotive multitouch capacitive touchscreen controller featuring a 32-bit Arm® Cortex® CPU, 77 configurable sense pins, support for up to 10 fingers, hover sensing up to 35 mm, force touch (0.5–10 N), and low-power wake-on-touch (<50 µA). It enables high-SNR operation with 20 V effective drive voltage using multi-phase TX and integrates CAPSENSE™ button, slider, and wet-finger tracking for in-vehicle infotainment displays.

For engineers reviewing the CYAT817AZA77-5BFBA datasheet, CYAT817AZA77-5BFBA pinout, CYAT817AZA77-5BFBA application, or CYAT817AZA77-5BFBA equivalent, this device supports I2C/SPI host interfaces, secondary CAN communication, dual-sense water rejection, glove mode (≤5 mm), and runtime diagnostics - critical for automotive HMI design requiring functional safety and EMI resilience.

Technical Context

The CYAT817AZA77-5BFBA implements a dedicated capacitive sensing architecture with 64 independent RX channels, each equipped with its own ADC, enabling single-pass long-side scanning at up to 250 Hz refresh rate and TX frequency hopping up to 300 kHz for adaptive noise filtering. Its integrated DSP accelerates touch data processing while maintaining low latency for real-time gesture recognition.

Force touch functionality uses five dedicated RX channels operating in parallel with touch scan, delivering 0.1 N resolution and 100 μm/10 N displacement sensitivity. The device supports split-screen and free-form shape detection via register-configurable sensor mapping and auto-baseline tracking across temperature and humidity variations.

Key Specifications

Pinout & Package

128-lead Thin Quad Flat Package (TQFP), 14 mm × 20 mm body, 1.4 mm height, 0.5 mm lead pitch. Exposed thermal pad on underside for enhanced heat dissipation in automotive environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYAT817AZS77-5BFBA, the CYAT817AZA77-5BFBA adds formal Automotive-A qualification for broader under-dash deployment; versus CYAT817AZA98-5BFBA, it offers identical feature depth at lower pin count and reduced PCB routing complexity for mid-size displays.

Availability

CYAT817AZA77-5BFBA is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and passenger entertainment modules requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for CYAT817AZA77-5BFBA 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 ICs, and security solutions, with global R&D and manufacturing infrastructure.

This device belongs to the PSoC™ Automotive Multitouch generation 7XL product line, designed specifically for robust, safety-conscious human-machine interfaces in modern vehicles - integrating capacitive sensing, force detection, and secure communication in a single AEC-Q100 qualified SoC.

FAQ

Does CYAT817AZA77-5BFBA support CAN FD or only classical CAN?

No, CYAT817AZA77-5BFBA supports only classical CAN 2.0B (up to 1 Mbps) on its secondary interface. CAN FD capability is not implemented in hardware or firmware; the datasheet specifies "CAN interface" without FD extension, and no CAN FD registers or bit-rate switching features are documented.

What is the maximum supported touchscreen size for this controller?

The CYAT817AZA77-5BFBA supports touchscreen sizes up to 15-inch diagonal, as confirmed by Infineon's system performance specifications. This assumes standard 5.3 mm electrode pitch and 16:10 aspect ratio; larger sizes require higher pin counts (e.g., CYAT817AZA98-5BFBA with 103 pins).

Is Android driver support included out-of-the-box?

Yes, Infineon provides a certified Android HAL (Hardware Abstraction Layer) driver for CYAT817AZA77-5BFBA, including kernel modules, touch framework integration, and gesture mapping APIs - verified for Android 11 through 14 on ARM64 platforms.

Can the device operate with a 1.8 V I/O supply while using 5 V for VCCTX?

Yes, CYAT817AZA77-5BFBA supports dual-supply operation: VDDIO may be set to 1.71–1.95 V for low-voltage logic interfacing, while VCCTX remains at 5 V to sustain 20 V effective TX drive voltage - both rails are independently regulated and decoupled per datasheet layout guidelines.