Infineon Technologies CY8C27243-24SXIT

Overview

CY8C27243-24SXIT 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. 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, and 12 analog PSoC blocks - used in embedded sensor interface and motor control subsystems.

For engineers reviewing the CY8C27243-24SXIT datasheet, CY8C27243-24SXIT pinout, CY8C27243-24SXIT application, or CY8C27243-24SXIT equivalent, key selection criteria include verified 24 MHz operation under 3.0–5.25 V supply, confirmed 44-pin SOIC package mapping, validated GPIO drive strength (25 mA sink / 10 mA source), and documented analog block count (12) with 14-bit ADC capability.

Technical Context

The CY8C27243-24SXIT implements a fixed-function M8C core with deterministic 4-MIPS throughput at 24 MHz, supported by internal 2.5% accurate 24/48-MHz IMO and optional 32.768-kHz ECO for RTC. Its digital system comprises eight 8-bit PSoC blocks combinable into 8–32-bit peripherals including two full-duplex UARTs and multiple PWM/timer configurations.

Analog functionality is delivered via twelve rail-to-rail configurable analog blocks supporting simultaneous ADC (up to 14-bit), DAC (up to 9-bit), PGA, and comparator functions - all routed through global analog interconnect and eight standard GPIO analog inputs plus four restricted analog inputs.

Key Specifications

Pinout & Package

Package: 44-pin SOIC (Small Outline Integrated Circuit), 300 mil width, JEDEC MS-013AC compliant. Pin pitch: 0.050 inch (1.27 mm). Thermal resistance θ_JA = 70 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C27443-24SXIT and CY8C29466-24PVXI, the CY8C27243-24SXIT offers optimal cost/performance balance for self-contained, non-USB embedded control where 16 KB flash and 12 analog blocks meet functional requirements - avoiding overdesign and unnecessary package migration.

Availability

CY8C27243-24SXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, smart lighting dimmers, and medical patient monitor front-ends requiring stable component supply across extended product lifecycles.

Supply support for CY8C27243-24SXIT 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 CY8C27x43 PSoC 1 family was designed to replace discrete analog/digital components with a single configurable SoC for cost-sensitive, low-power embedded control - targeting applications where flexibility and rapid prototyping outweigh raw performance.

FAQ

What is the maximum operating frequency of the M8C core in CY8C27243-24SXIT?

The M8C processor operates at up to 24 MHz across the full industrial temperature range (–40 °C to +85 °C) and supply voltage range (3.0 V to 5.25 V), delivering 4 MIPS throughput. This frequency is guaranteed by internal 2.5% accurate IMO and does not require external clocking.

Does CY8C27243-24SXIT support true hardware UART with automatic baud rate generation?

Yes - it integrates two full-duplex UARTs with programmable baud rate generators, 8-bit data width, selectable parity, and hardware flow control support. Each UART has dedicated TX/RX registers and status flags accessible via memory-mapped I/O.

Can the analog blocks perform simultaneous ADC and DAC operations?

Yes - the 12 analog PSoC blocks operate independently and concurrently. For example, one block can run a 14-bit successive-approximation ADC while another executes a 9-bit DAC with programmable settling time - all synchronized to the same system clock domain.

Is ISSP programming supported on CY8C27243-24SXIT, and what interface pins are required?

Yes - in-system serial programming is fully supported using the MiniProg1 or MiniProg3 programmers. Only four pins are needed: VDD, VSS, SDATA (serial data), and SCLK (serial clock) - no JTAG or debug header required.