Infineon Technologies CY8C4244AZI-443

Overview

CY8C4244AZI-443 from Infineon Technologies (formerly Cypress) is a 32-bit Arm® Cortex™-M0 programmable system-on-chip (PSoC® 4200 family) featuring 32 kB flash, 4 kB SRAM, 12-bit 1-Msps SAR ADC, two opamps with comparator mode, and capacitive sensing (CapSense® CSD). It integrates programmable analog/digital blocks, four TCPWM timers, two SCBs supporting I²C/SPI/UART, and operates from 1.71 V to 5.5 V across –40 °C to +105 °C. Used in industrial HMI, smart sensor nodes, and embedded control with field-reconfigurable logic.

For engineers reviewing the CY8C4244AZI-443 datasheet, CY8C4244AZI-443 pinout, CY8C4244AZI-443 application, or CY8C4244AZI-443 equivalent, key selection criteria include its 44-pin TQFP package, Deep Sleep current of 20 nA, CapSense® SNR >5:1, SmartSense™ auto-tuning, and SWD debug interface compatibility with Arm industry-standard tools.

Technical Context

The device implements a single-layer AHB-Lite interconnect between CPU, memory, and peripherals, with dedicated clock gating for low-power operation. Its programmable analog subsystem includes configurable opamp drive modes (high-bandwidth internal / high-drive external), ADC input buffering, and dual low-power comparators active in Deep Sleep mode.

Digital flexibility stems from four Universal Digital Blocks (UDBs), each with 8 macrocells and data path, enabling user-defined state machines or Verilog-based logic. Two serial communication blocks (SCBs) support runtime reconfiguration among I²C, SPI, and UART protocols without firmware reload.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (10 mm × 10 mm, 0.8 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable mixed-signal MCU applications.

Compared with CY8C4244AZI-443, CY8C4245FNI-483 trades CapSense® capability for smaller footprint, while STM32F072RBT6 offers more memory but lacks hardware programmability-making CY8C4244AZI-443 optimal for designs requiring integrated, tunable analog and digital logic in industrial TQFP layouts.

Availability

CY8C4244AZI-443 is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, motor control interfaces, and embedded power supplies requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for CY8C4244AZI-443 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 is a global semiconductor leader headquartered in Munich, Germany, delivering power systems, microcontrollers, sensors, and security solutions for automotive, industrial, and IoT applications.

CY8C4244AZI-443 belongs to the PSoC® 4200 family - a mixed-signal programmable SoC platform designed for embedded control applications requiring flexible analog/digital integration, ultra-low-power operation, and field-reconfigurable logic without external components.

FAQ

What is the maximum operating frequency of the Arm Cortex-M0 core in CY8C4244AZI-443?

The CY8C4244AZI-443 features a 48-MHz Arm Cortex-M0 CPU with single-cycle 32-bit multiply capability. This frequency is achievable across the full industrial temperature range (–40 °C to +105 °C) when supplied with 1.71–5.5 V and using the internal IMO or external crystal clock source. The Read Accelerator ensures zero-wait-state execution at 24 MHz and one-wait-state performance at 48 MHz.

Does CY8C4244AZI-443 support hardware-accelerated capacitive sensing?

Yes, CY8C4244AZI-443 includes the CapSense® Sigma-Delta (CSD) block with hardware acceleration, delivering >5:1 signal-to-noise ratio and water tolerance. It supports SmartSense™ automatic tuning, eliminating manual calibration. The CSD block is fully integrated into the analog subsystem and routes directly to GPIO pins without external components.

Can the programmable digital blocks (UDBs) be used to implement custom communication protocols?

Yes, the four Universal Digital Blocks (UDBs) support Verilog HDL input and can implement custom serial protocols such as proprietary UART variants, LIN-like framing, or bit-banged I²C/SPI with nonstandard timing. Each UDB includes macrocells and data path logic, enabling state machines and combinatorial logic that operate independently of the CPU.

What debug interfaces are supported, and is external hardware required?

CY8C4244AZI-443 supports Serial Wire Debug (SWD) via SWDIO and SWDCLK pins. No external emulator or pod is required - standard programming connections suffice. Debug is enabled by default and can be disabled in firmware; re-enabling requires full flash erase. MiniProg3 and Arm-compatible debug probes (e.g., ST-Link, J-Link) are fully supported.