Infineon Technologies CYAT847AZA98-42002

Overview

CYAT847AZA98-42002 from Infineon Technologies is an AEC-Q100 qualified automotive-grade capacitive touchscreen controller IC, serving as a slave device in multi-chip PSoC™ Generation 7XL touch systems. It features a 32-bit Arm® Cortex® CPU, supports up to 296 sense pins and 10320 intersections, delivers 120 Hz refresh rate, operates across -40°C to 85°C, and enables ten-finger tracking with thin-glove (≤1 mm) and wet-finger operation in automotive infotainment displays.

For engineers reviewing the CYAT847AZA98-42002 datasheet, CYAT847AZA98-42002 pinout, CYAT847AZA98-42002 application, or CYAT847AZA98-42002 equivalent, key selection criteria include its role as a slave controller in scalable multitouch architectures, 128-pin TQFP package compatibility, glove/water rejection capability, I²C host interface (up to 1 Mbps), and dual-sense (DualSense) signal processing for high-noise automotive environments.

Technical Context

This device functions exclusively as a slave controller in a master-slave multichip architecture-CYAT837X serves as master, CYAT847X as slave-enabling scalable electrode count expansion beyond single-chip limits. It integrates 192 independent ADC channels, supports high-order multi-phase TX (up to 150 kHz), and uses register-configurable noise-suppression algorithms including DisplayArmor and AutoArmor for EMI robustness.

The IC implements DualSense technology for simultaneous self-capacitance and mutual-capacitance measurement, enabling reliable water rejection and wet-finger tracking. Its analog supply range is 3.0–5.5 V, digital/logic supply is 1.71–1.95 V and 3.0–5.5 V, and it supports field upgrades via integrated bootloader without external programming hardware.

Key Specifications

Pinout & Package

Package: 128-pin TQFP (14 × 20 × 1.4 mm, 0.5-mm pitch), RoHS-compliant, tray or tape-and-reel delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CYAT847AZS98-42002, this part trades extended temperature range for lower cost and qualification scope; compared with CYAT837AZA98-42002, it lacks master arbitration logic but enables modular, cost-optimized multi-chip layouts where electrode count exceeds single-master capacity.

Availability

CYAT847AZA98-42002 is available at Aetrix Electronics and suitable for automotive center stack touchscreens, instrument cluster overlays, HUD touch panels, and passenger-seat infotainment tablets requiring stable component supply across production lifecycles.

Supply support for CYAT847AZA98-42002 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 scalable, AEC-Q100 qualified capacitive touch systems in safety-critical automotive human-machine interfaces.

FAQ

Is CYAT847AZA98-42002 a standalone touchscreen controller?

No. It operates exclusively as a slave controller and requires pairing with a CYAT837X-series master device (e.g., CYAT837AZA98-42002) to form a functional multitouch system. It lacks boot ROM, system coordinator logic, and full host interface stack needed for autonomous operation.

What is the maximum electrode count supported in a multi-chip configuration using this part?

In a two-chip configuration (one CYAT837X master + one CYAT847X slave), up to 296 sense pins and 10,320 intersections are supported. With three chips (one master + two slaves), total capacity scales to 444 sense pins and 15,480 intersections, as confirmed in Infineon's Gen 7XL system architecture documentation.

Does this IC support I²C clock stretching or multi-master arbitration?

No. CYAT847AZA98-42002 implements I²C as a pure slave with fixed address and no clock stretching capability. Multi-master arbitration is not supported-it assumes exclusive control by the designated master controller (CYAT837X) or host processor in non-multichip configurations.

Can the device perform self-calibration during operation without host intervention?

Yes. It includes automatic baseline tracking that continuously adapts to environmental changes (e.g., temperature drift, humidity, aging) without host commands. This function runs in hardware and updates reference baselines every 2–5 seconds depending on configured scan interval and noise conditions.