Infineon Technologies CY8C5365AXI-043

Overview

CY8C5365AXI-043 from Infineon Technologies (acquired Cypress Semiconductor) is a programmable system-on-chip (PSoC® 5) integrating a 32-bit ARM Cortex-M3 CPU, 256 KB flash, 64 KB SRAM, 2-KB EEPROM, 12-bit SAR ADC (700 ksps), and dual 8-bit DACs (5.5 Msps). It features 60 GPIOs, 24 UDBs, full-speed USB 2.0, and CapSense® support - deployed in industrial HMI, medical sensor hubs, and programmable power control systems.

For engineers reviewing the CY8C5365AXI-043 datasheet, CY8C5365AXI-043 pinout, CY8C5365AXI-043 application, or CY8C5365AXI-043 equivalent, key selection criteria include its 67 MHz max CPU clock, 2.7–5.5 V operating range, 2-µA sleep mode, 46×16 LCD drive capability, and configurable analog/digital routing across all GPIOs.

Technical Context

The device implements a hierarchical architecture with tightly coupled ARM Cortex-M3 core, PHUB-based DMA controller supporting chained descriptors and AHB bus access, and dual-domain I/O system enabling independent 1.2–5.5 V interface voltages. Its analog subsystem centers on a 1.024 V ±1% internal reference, enabling high-accuracy signal acquisition across thermocouple to ultrasonic bands.

Digital flexibility derives from 24 universal digital blocks (UDBs) containing PLD logic and state machines, routed via digital system interconnect (DSI) to any GPIO. Analog signal pathing uses dedicated analog muxes and buses, allowing up to 62 analog inputs routed through 60 GPIOs - with opamps, comparators, SC/CT blocks, and SAR ADC sharing common analog resources.

Key Specifications

Pinout & Package

CY8C5365AXI-043 is housed in a 68-pin QFN package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per the official Cypress CY8C53 Family Datasheet (001-66237 Rev. *D), Section 2 (Pinouts) and Section 3 (Pin Descriptions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable SoC applications.

Compared with CY8C5867AXI-LP047 and STM32F303VCT6, CY8C5365AXI-043 delivers superior analog-digital co-design capability within a compact 68-QFN footprint, enabling single-chip sensor-to-USB solutions where firmware size and external BOM reduction are critical.

Availability

CY8C5365AXI-043 is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical sensor hubs, programmable DC power controllers, and smart lighting control modules requiring stable component supply and long-term lifecycle support.

Supply support for CY8C5365AXI-043 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 acquired Cypress Semiconductor in 2020 and now manufactures and supports the PSoC® family. Cypress pioneered configurable mixed-signal SoCs, emphasizing analog-digital convergence and rapid prototyping.

The CY8C53 family targets applications demanding high analog precision, flexible digital logic, and ultra-low-power operation - especially where last-minute firmware-driven feature changes replace hardware respins.

FAQ

Does CY8C5365AXI-043 support USB device mode without an external crystal?

Yes - it supports Full-Speed USB 2.0 device mode using an internal 24 MHz IMO clock, though Cypress recommends a 24 MHz crystal for USB compliance and reduced EMI. The IMO can be trimmed via firmware to meet ±0.25% USB timing tolerance under stable temperature conditions.

Can all 60 GPIOs be used simultaneously for analog input with the SAR ADC?

No - while all 60 GPIOs are routable to the analog subsystem, the SAR ADC has a single sample-and-hold circuit and multiplexed input channel. Up to 62 analog inputs may be scanned sequentially, but only one conversion occurs at a time; simultaneous sampling requires external analog front-end.

What is the maximum achievable resolution for PWM-based DAC output using UDBs?

Using UDB-based PWM DACs with dithering and filtering, up to 10-bit effective resolution is achievable at ≤48 kHz update rate. This relies on programmable counter widths and sigma-delta modulation implemented in UDB logic - documented in AN76312 and PSoC Creator component library examples.

Is the 2-KB EEPROM truly byte-erasable and wear-levelled in hardware?

Yes - the EEPROM block supports true byte-level writes and erases with built-in wear leveling across 2,048 bytes. Each byte endures 1 million cycles with 20-year data retention at 85°C, managed by dedicated EEPROM controller hardware without firmware intervention.