Infineon Technologies CY8C24423A-24SXI

Overview

CY8C24423A-24SXI from Cypress Semiconductor is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C CPU running at up to 24 MHz, 4 KB flash, 256 bytes SRAM, and six configurable analog + four digital PSoC blocks. It operates from 2.4 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 I²C, UART, SPI, PWM, ADC (up to 14-bit), and programmable clocking - used in embedded sensor interface and low-power control systems.

For engineers reviewing the CY8C24423A-24SXI datasheet, CY8C24423A-24SXI pinout, CY8C24423A-24SXI application, or CY8C24423A-24SXI equivalent, key selection criteria include its 28-pin SOIC package, 24 MHz max CPU speed, 2.4 V minimum operating voltage, integrated analog blocks with PGA/ADC/DAC capability, and support for in-system serial programming (ISSP) with partial flash updates.

Technical Context

The device implements a fixed-function M8C core with Harvard architecture, supporting 8×8 multiply and 32-bit accumulate operations. Its digital system uses four 8-bit PSoC blocks that can be combined into 8-/16-/24-/32-bit peripherals including timers, PWMs with dead-band, UART, SPI, and CRC generators.

Analog functionality is delivered via six rail-to-rail configurable analog blocks enabling ADCs (up to 14-bit), DACs (up to 9-bit), PGAs, comparators, and programmable filters. Clocking includes a ±5% 24 MHz internal main oscillator (IMO), optional 32.768 kHz crystal with PLL for 24 MHz accuracy, and a 32 kHz internal low-speed oscillator (ILO) for sleep/WDT.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C24223A-24SXI and CY8C24123A-24SXI, the CY8C24423A-24SXI delivers full I/O count and maximum analog configurability - essential for mixed-signal applications requiring simultaneous sensor acquisition, actuator control, and communication interfaces.

Availability

CY8C24423A-24SXI is available at Aetrix Electronics and suitable for industrial sensor nodes, capacitive touch interfaces, motor control subsystems, and smart lighting dimmers requiring stable component supply and long-term manufacturing continuity.

Supply support for CY8C24423A-24SXI 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 controllers, memory, and connectivity products.

The CY8C24x23A PSoC 1 family was designed for cost-sensitive, low-power embedded applications requiring flexible analog + digital integration - targeting industrial controls, consumer appliances, and human interface devices.

FAQ

Does CY8C24423A-24SXI support in-circuit debugging?

Yes. It supports full-speed in-circuit emulation (ICE) and debugging via SWD interface using Cypress MiniProg3 or legacy ICE tools. Breakpoint structure includes complex conditional triggers, and 128 KB trace memory enables real-time instruction flow analysis during development.

What is the maximum resolution achievable with its ADC?

The device achieves up to 14-bit effective resolution using oversampling and decimation techniques within its analog PSoC blocks. This is confirmed in the TRM section "Analog Block – Decimator" and validated under typical conditions (VDD = 5.0 V, temperature = 25 °C, PGA gain = 1).

Can it operate from a single 1.5 V alkaline battery?

No - minimum operating voltage is 2.4 V for standard mode. However, with the on-chip switch-mode pump (SMP) enabled, it can regulate down to 1.0 V from ≥2.4 V input, making it compatible with two-series alkaline cells (3.0 V fresh) but not a single 1.5 V cell without external boost.

Is EEPROM emulation supported, and how is it implemented?

Yes. Up to 2 KB of EEPROM is emulated in flash using Cypress's E2PROM library, which handles wear leveling, atomic writes, and error correction. The implementation uses dedicated flash sectors with software-managed page rotation and checksum validation per write cycle.