Infineon Technologies CYAT817AZS77-5A202

Overview

CYAT817AZS77-5A202 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, and wake-on-touch screen functionality. It delivers 30 mW average power consumption, operates across –40°C to 85°C, and targets in-vehicle infotainment touchscreens with glove and wet-finger tracking.

For engineers reviewing the CYAT817AZS77-5A202 datasheet, CYAT817AZS77-5A202 pinout, CYAT817AZS77-5A202 application, or CYAT817AZS77-5A202 equivalent, this device is selected for automotive-grade touch systems requiring robust EMI immunity, low-power wake-up (<50 µA), split-screen support, and dual-sense water rejection - all within a 128LD TQFP package.

Technical Context

The CYAT817AZS77-5A202 implements CAPSENSE™ technology with integrated DSP for single-pass long-side scanning using 64 dedicated RX ADC channels. Its multi-phase TX architecture supports up to 300 kHz frequency hopping and delivers effective 20 V drive (with 17-phase TX and 5 V VCCTX) to maximize SNR in noisy automotive environments.

It features two independent communication interfaces: primary I²C/SPI for touch data transfer and secondary configurable I²C/SPI (custom firmware required); CAN interface is enabled per ordering code but not activated in this variant. Force touch and slider sensing are disabled in this configuration, while wake-up button and CAPSENSE™ button sensing remain active.

Key Specifications

Pinout & Package

Package: 128-lead TQFP (14 mm × 20 mm × 1.4 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYAT817AZS77-5A202, the -5A002 sacrifices full-screen wake capability for lower BOM cost, while the -3B202 trades 5 fewer sense pins for force and slider functionality - making each optimal for distinct UI architecture requirements.

Availability

CYAT817AZS77-5A202 is available at Aetrix Electronics and suitable for automotive infotainment systems, digital instrument clusters, and center console control panels requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for CYAT817AZS77-5A202 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, engineered specifically for high-reliability, noise-immune capacitive touch interfaces in automotive cockpits and ADAS-adjacent human-machine interaction systems.

FAQ

Is CYAT817AZS77-5A202 pin-compatible with other CYAT817X variants in the 128LD TQFP package?

Yes, all 128LD TQFP variants in the CYAT817X family share identical mechanical footprint and pin assignment. However, functional differences exist: this variant disables force touch, slider, haptic, acoustic, and proximity interfaces per its ordering code, though the corresponding pins remain electrically present and configurable as general-purpose I/O if needed.

Does CYAT817AZS77-5A202 support CAN communication out-of-the-box?

No. Although the CYAT817X silicon includes CAN hardware, CYAT817AZS77-5A202's ordering code does not enable the CAN interface. The CAN block remains unconfigured in factory firmware; activation requires custom firmware development and validation, and is not supported in standard Infineon-provided drivers.

What is the maximum supported touchscreen size for CYAT817AZS77-5A202?

The device supports touchscreen diagonals up to 15 inches, contingent on electrode pitch (minimum 5.3 mm recommended) and aspect ratio (optimized for 16:10). At 77 sense pins, practical implementation typically targets 10–12 inch displays with 10-finger tracking and hover, balancing resolution, scan time, and SNR.

How does the low-power wake-up button function differ from wake-on-touch screen in this part?

The low-power wake-up button uses dedicated hardware circuitry consuming <50 µA to detect presses on defined CAPSENSE™ buttons while the core remains in Deep Sleep. Wake-on-touch screen activates the full touch engine upon any valid screen contact, requiring higher current (≈300 µA) but enabling full UI resume without physical button press.