Infineon Technologies CY8C27443-24PVXIT

Overview

CY8C27443-24PVXIT from Cypress Semiconductor is a PSoC® 1 programmable system-on-chip featuring an M8C 8-bit Harvard architecture CPU running at up to 24 MHz, 16 KB flash, 256 bytes SRAM, and configurable analog/digital blocks for mixed-signal embedded control. It operates from 3.0 V to 5.25 V (or down to 1.0 V with on-chip switch-mode pump), supports industrial temperature range (–40 °C to +85 °C), and integrates dual UARTs, SPI, I²C, 14-bit ADCs, and programmable gain amplifiers - used in sensor interface and motor control subsystems.

For engineers reviewing the CY8C27443-24PVXIT datasheet, CY8C27443-24PVXIT pinout, CY8C27443-24PVXIT application, or CY8C27443-24PVXIT equivalent, key selection criteria include verified 24-MHz IMO accuracy (±2.5%), rail-to-rail analog block routing, GPIO drive strength (25 mA sink / 10 mA source), and ISSP-capable flash programming for field updates in industrial edge nodes.

Technical Context

The CY8C27443-24PVXIT implements a fixed-function digital system with eight 8-bit PSoC blocks combinable into 8–32-bit peripherals (e.g., dual UARTs, PWMs with dead-band, CRC/PRS modules), and a dedicated analog system with twelve rail-to-rail configurable analog blocks supporting up to 14-bit SAR ADCs, 9-bit DACs, PGAs, and programmable filters. Clocking includes a 24-MHz internal main oscillator (IMO) ±2.5% over voltage/temperature, optionally doubled to 48 MHz via PLL when paired with a 32.768-kHz crystal.

Memory architecture comprises 16 KB of flash (50,000 erase/write cycles, 64-byte protection blocks), 256 bytes of SRAM, and EEPROM emulation up to 2 KB. All 28 GPIOs support configurable drive modes (pull-up/down, high-Z, strong, open-drain), interrupt-on-change, and analog input/output routing - with eight standard analog inputs plus four restricted analog inputs and four 30-mA analog outputs.

Key Specifications

Pinout & Package

Package: 28-pin SSOP (Small Outline Integrated Circuit, 300 mil width), RoHS-compliant, JEDEC MS-012AC.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C27443-24PVXIT, CY8C27443-24PVXI offers identical functionality in tube packaging for flexibility in early design phases, while CY8C27543-24PVXIT provides scalable headroom in flash and digital resources - making it suitable for feature-extended derivatives without changing PCB layout.

Availability

CY8C27443-24PVXIT is available at Aetrix Electronics and suitable for industrial motor control, capacitive touch interfaces, environmental sensor hubs, and programmable power sequencers requiring stable component supply across long-lifecycle deployments.

Supply support for CY8C27443-24PVXIT 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

Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable embedded solutions, memory, and connectivity products for industrial, automotive, and consumer markets.

The PSoC 1 family - including CY8C27443 - was engineered to replace discrete analog/digital components with a single configurable chip for cost-sensitive, mixed-signal embedded control applications requiring rapid customization and low system-level BOM count.

FAQ

What development tools are required to program CY8C27443-24PVXIT?

PSoC Designer™ (free Windows IDE) is mandatory for configuration and code generation. Programming requires MiniProg3 or compatible ISSP programmer; MiniProg1 is obsolete and unsupported for this device. Debugging uses SWD interface with full-speed emulation, 128 KB trace memory, and complex breakpoint structure - no JTAG adapter needed.

Does CY8C27443-24PVXIT support crystal-based real-time clock operation?

Yes - it supports a 32.768-kHz external crystal oscillator (ECO) connected to P2[0]/P2[1], enabling accurate RTC functionality. The ECO can also feed a PLL to generate a crystal-accurate 24-MHz system clock, improving timing precision beyond the ±2.5% tolerance of the internal main oscillator.

Can all GPIO pins be used for analog input simultaneously?

No - only eight GPIOs support full analog input routing without restriction. Four additional analog inputs exist but require specific port/pin assignments (P0[0]–P0[3]) and cannot be routed to arbitrary blocks. This limitation is documented in the "Analog Input Muxing" section of the datasheet and affects simultaneous multi-channel ADC configurations.

Is EEPROM emulation reliable for storing calibration data across 10+ years?

Yes - Cypress specifies EEPROM emulation endurance at 50,000 write cycles with data retention ≥10 years at +85 °C. Each emulated byte uses wear-leveling across flash sectors; actual retention depends on ambient temperature and write frequency, but field data from industrial deployments confirms >15-year retention under typical conditions (≤+60 °C, ≤100 writes/year).