Infineon Technologies CY8C27543-24AXIT

Overview

CY8C27543-24AXIT from Cypress Semiconductor is a programmable 8-bit PSoC® 1 mixed-signal system-on-chip featuring an M8C CPU core running at up to 24 MHz, 16 KB flash, 256 bytes SRAM, and configurable analog/digital blocks-including 12 analog and 8 digital PSoC blocks-for embedded control in industrial sensor interfaces, motor control feedback loops, and smart power supply monitoring.

For engineers reviewing the CY8C27543-24AXIT datasheet, CY8C27543-24AXIT pinout, CY8C27543-24AXIT application, or CY8C27543-24AXIT equivalent, this device supports rail-to-rail ADCs (up to 14-bit), programmable gain amplifiers, dual UARTs, I²C up to 400 kHz, and flexible GPIO drive modes-critical for rapid prototyping of analog-digital hybrid systems with minimal external components.

Technical Context

The CY8C27543-24AXIT implements a Harvard-architecture M8C core with 24 MHz operation, 8×8 multiply/32-bit accumulate capability, and on-chip switch-mode pump enabling 1.0 V minimum operating voltage. It integrates dual clock domains: a ±2.5% 24/48 MHz internal main oscillator (IMO) and a 32.768 kHz ECO option with PLL for crystal-accurate timing.

Analog functionality is delivered via twelve configurable analog PSoC blocks supporting simultaneous ADC (14-bit max), DAC (9-bit), PGA (gain up to 48×), and comparator functions-all routable through global analog interconnect. Digital peripherals include eight programmable digital blocks supporting 8–32-bit timers, dual UARTs, SPI masters/slaves, and CRC/PRS modules, all connectable to any GPIO.

Key Specifications

Pinout & Package

Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, industrial temperature range (–40 °C to +85 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C27443-24AXI, the CY8C27543-24AXIT provides double flash and full analog block count for richer signal processing; versus CY8C29466-24PVXI, it trades package size and memory for lower cost and thermal profile in space-constrained industrial modules.

Availability

CY8C27543-24AXIT is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control feedback systems, and smart power supply monitors requiring stable component supply across long-lifecycle production programs.

Supply support for CY8C27543-24AXIT 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 U.S.-based semiconductor company specializing in programmable mixed-signal and digital ICs for embedded control and connectivity.

The CY8C27x43 series belongs to the PSoC® 1 family - designed specifically for cost-sensitive, low-power industrial and consumer applications requiring integrated analog signal conditioning and flexible digital logic in a single chip.

FAQ

Does CY8C27543-24AXIT support in-circuit debugging?

Yes. It supports full-speed in-circuit emulation (ICE) via MiniProg1/MiniProg3 programmers and PSoC Designer IDE. Breakpoint structure includes hardware breakpoints, trace memory, and real-time variable watch - enabling step-through debugging without code instrumentation or performance impact.

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 margin at 24 MHz - sufficient for reliable communication without external crystal in non-automotive applications.

How is EEPROM functionality implemented?

EEPROM emulation uses dedicated flash sectors with wear-leveling firmware in PSoC Designer. Up to 2 KB of emulated EEPROM is supported, with 100,000 write cycles per logical byte - managed transparently via API calls like CyEEPROM_Write() and CyEEPROM_Read().

What GPIO configurations support analog input with PGA?

Eight GPIOs on Port 0 (P0[0]–P0[7]) support full analog input routing to all 12 analog blocks with PGA gain selection. Four additional analog inputs are available on Port 1 (P1[0]–P1[3]), but with restricted routing - only to specific analog blocks per device datasheet Table 11-1.