Infineon Technologies CYAT817AZS98-5BFBA

Overview

CYAT817AZS98-5BFBA from Infineon is an AEC-Q100 qualified automotive-grade capacitive touchscreen controller featuring a 32-bit Arm® Cortex® CPU, 103 configurable sense pins (98 TX/RX + 5 TX-only), 10-finger multitouch tracking, hover sensing up to 35 mm, force touch (0.1 N resolution, 0.5–10 N range), and integrated CAPSENSE™ for buttons, sliders, and wake-on-touch with <50 µA deep-sleep current. It supports glove operation (≤5 mm), wet-finger tracking, and dual-sense water rejection in automotive infotainment displays.

For engineers reviewing the CYAT817AZS98-5BFBA datasheet, CYAT817AZS98-5BFBA pinout, CYAT817AZS98-5BFBA application, or CYAT817AZS98-5BFBA equivalent, this device delivers verified performance in high-noise automotive environments with I2C/SPI host interfaces, optional CAN safety channel, cryptographic engine support, and field-upgradable firmware via bootloader.

Technical Context

This controller implements a multi-phase TX architecture with up to 17-phase drive and 5 V VCCTX supply, enabling effective 20 V drive for enhanced SNR. Its integrated DSP performs real-time noise filtering, baseline adaptation, and parallel touch/force scanning using five dedicated RX channels.

The device supports split-screen and free-form shape recognition through configurable electrode mapping and runtime diagnostics. Secondary communication includes I2C/SPI master/slave capability and CAN interface-enabled via custom firmware-for functional safety monitoring and sensor fusion with external accelerometers or IR proximity sensors.

Key Specifications

Pinout & Package

128-lead TQFP package (14 mm × 20 mm × 1.4 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions include 98 configurable analog sense I/Os (TX/RX), 5 dedicated TX-only outputs, I2C/SPI/CAN interface lines, power domains (1.71–1.95 V core, 3.0–5.5 V I/O/analog), reset, interrupt, and diagnostic signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYAT817AZS98-5BFFE, CYAT817AZS98-5BFBA trades CAN safety reporting and haptic control for lower system integration overhead; versus CYAT817AZA98-5BFBA, it offers identical functionality at reduced thermal qualification cost for standard cabin environments.

Availability

CYAT817AZS98-5BFBA is available at Aetrix Electronics and suitable for automotive infotainment displays, digital instrument clusters, and passenger control panels requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for CYAT817AZS98-5BFBA 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 microcontrollers, and sensing solutions, with global R&D and manufacturing infrastructure.

CYAT817X belongs to Infineon's PSoC™ Automotive Multitouch generation 7XL product line, engineered specifically for high-reliability, noise-immune capacitive touch in automotive cockpit systems with stringent EMI, temperature, and safety requirements.

FAQ

What is the maximum supported touchscreen size for CYAT817AZS98-5BFBA?

The device supports screen sizes up to 15-inch diagonal with 16:10 aspect ratio and 5.3 mm electrode pitch. This is achieved using its 103 sense pins and configurable multi-phase TX architecture, which enables fine-grained electrode mapping and high-resolution touch interpolation across large active areas without external multiplexers.

Does CYAT817AZS98-5BFBA support both mutual and self-capacitance sensing?

Yes-it supports mutual capacitance for primary multitouch tracking and self-capacitance for CAPSENSE™ buttons, sliders, and wake-on-touch functionality. The dual-sense capability is implemented via independent TX/RX path routing and time-multiplexed acquisition, enabling simultaneous water rejection and hover detection without performance trade-offs.

Is CAN interface functionality enabled by default on CYAT817AZS98-5BFBA?

No. The CAN interface requires custom firmware to enable and configure the secondary SCB as CAN master or slave. Hardware pins (CANH/CANL) are present and electrically compliant, but protocol stack implementation-including bit timing, arbitration, and error handling-must be added via Infineon-provided middleware or customer-developed code.

What is the minimum detectable finger size and how is it achieved?

The controller detects fingers as small as 5 mm diameter using adaptive baseline tracking, high-SNR 20 V effective drive, and integrated DSP filtering. This is validated under AEC-Q100 conditions with 1 mm PET overlay and 0.5 mm ITO trace width, leveraging 64-channel parallel ADC architecture to resolve sub-pixel capacitance changes across dense electrode grids.