Infineon Technologies CY8C27243-24PVXIT

Overview

CY8C27243-24PVXIT 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 integrated analog/digital configurable blocks. 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 delivers mixed-signal flexibility for embedded control with programmable I/O and precision clocking.

For engineers reviewing the CY8C27243-24PVXIT datasheet, CY8C27243-24PVXIT pinout, CY8C27243-24PVXIT application, or CY8C27243-24PVXIT equivalent, this device serves as a single-chip replacement for discrete MCU + analog front-end + digital logic combinations in resource-constrained industrial and consumer systems requiring reconfigurable peripherals and low-voltage operation.

Technical Context

The CY8C27243-24PVXIT integrates a 24-MHz internal main oscillator (±2.5% accuracy) with optional PLL doubling to 48 MHz, plus a 32-kHz ILO for sleep/WDT timing and ECO support for crystal-accurate RTC. Its digital system comprises eight 8-bit PSoC blocks configurable as timers, PWMs, UARTs (up to two), SPI masters/slaves, and CRC/PRS modules.

The analog system includes twelve rail-to-rail configurable analog blocks supporting up to 14-bit ADCs, 9-bit DACs, PGAs, filters, and comparators - all routed via global analog interconnect to eight standard GPIO analog inputs and four restricted analog inputs, with four 30-mA analog outputs available.

Key Specifications

Pinout & Package

Package: 28-pin SSOP (Small Outline Integrated Circuit, Plastic, Shrink), body width 0.209 inch (5.3 mm), lead pitch 0.025 inch (0.635 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C27443-24PVXI and CY8C27143-24PVXI, the CY8C27243-24PVXIT offers balanced analog/digital resources and memory in a compact 28-pin package - ideal for mid-complexity embedded controllers where footprint and BOM cost must be optimized without sacrificing configurability.

Availability

CY8C27243-24PVXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, consumer appliance control, medical handheld diagnostics, and automotive body electronics requiring stable component supply and long-term manufacturability.

Supply support for CY8C27243-24PVXIT 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, USB connectivity, memory, and PSoC architectures since 1982.

The CY8C27x43 series belongs to the PSoC 1 family - designed specifically for cost-sensitive, low-power mixed-signal applications requiring field-reconfigurable analog and digital peripherals in a single chip.

FAQ

Does CY8C27243-24PVXIT support in-circuit debugging without external hardware?

Yes - it supports full-speed in-circuit emulation (ICE) via the MiniProg1 or MiniProg3 programmer/debugger using the ISSP interface. No external JTAG adapter is required; breakpoints, trace memory (128 KB), and real-time variable watch are supported directly through PSoC Designer software on Windows.

Can the internal 24-MHz oscillator meet timing-critical UART baud rates?

Yes - the ±2.5% accuracy of the internal main oscillator (IMO) supports standard UART baud rates (e.g., 9600, 19200, 115200) with less than 1.5% error at 24 MHz, well within the ±2% tolerance limit for asynchronous serial communication without external crystal dependency.

How is EEPROM functionality implemented given no physical EEPROM memory?

EEPROM emulation uses dedicated flash sectors with wear-leveling firmware in PSoC Designer. Up to 2 KB of emulated EEPROM is available, rated for 100,000 write cycles per byte, with atomic write/erase operations and built-in error detection - validated for data logging and calibration storage in industrial environments.

What is the maximum sustained analog output current per GPIO pin?

Four GPIO pins (P0[0], P0[1], P1[0], P1[1]) support analog output mode with 30 mA continuous drive capability each. This is specified under VDD = 5.0 V and TA = 25 °C per the DC Electrical Characteristics table; derating applies above 85 °C ambient.