Infineon Technologies CY8C24123A-24PXI

Overview

CY8C24123A-24PXI 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 analog + four digital configurable 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, DAC, and PGA functions - used in embedded sensor interface and motor control subsystems.

For engineers reviewing the CY8C24123A-24PXI datasheet, CY8C24123A-24PXI pinout, CY8C24123A-24PXI application, or CY8C24123A-24PXI equivalent, key selection criteria include its 28-pin PDIP package, 24 MHz IMO clock accuracy (±5%), 14-bit ADC capability, GPIO drive strength (25 mA sink / 10 mA source), and PSoC Designer™ toolchain support for rapid analog/digital co-design.

Technical Context

The CY8C24123A-24PXI implements a fully integrated mixed-signal SoC architecture with separate global digital and analog interconnects, enabling dynamic routing of signals between configurable blocks and GPIOs. Its M8C core executes instructions at up to 24 MHz with 4-MIPS throughput, supported by dual-clock domains: a ±5% 24 MHz internal main oscillator (IMO) and a 32 kHz internal low-speed oscillator (ILO) for sleep/WDT.

Analog functionality is delivered via six rail-to-rail PSoC analog blocks supporting up to 14-bit SAR ADCs, 9-bit DACs, programmable gain amplifiers (PGAs), and analog comparators with filtering. Digital peripherals are built from four 8-bit digital blocks that can be combined into 8–32-bit timers, PWMs, UARTs, SPI masters/slaves, and CRC/PRS modules - all routable to any GPIO.

Key Specifications

Pinout & Package

Package: 28-pin plastic dual in-line package (PDIP), 0.600-inch width, lead finish matte tin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C24223A-24PXI and CY8C24423A-24PXI, the CY8C24123A-24PXI provides optimal cost/performance balance for resource-constrained embedded control where 4 KB flash, 256 bytes SRAM, and six analog/four digital blocks meet functional requirements without over-provisioning.

Availability

CY8C24123A-24PXI is available at Aetrix Electronics and suitable for motor control interfaces, capacitive touch panels, industrial sensor nodes, and smart power metering requiring stable component supply and long-term industrial lifecycle support.

Supply support for CY8C24123A-24PXI 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) designs programmable mixed-signal ICs for embedded control, offering PSoC architecture since 2002.

The CY8C24x23A product line delivers low-voltage, low-power programmable SoCs targeting cost-sensitive industrial and consumer applications requiring analog signal conditioning, digital control, and flexible I/O routing in compact PDIP packages.

FAQ

What development tools are required to program the CY8C24123A-24PXI?

PSoC Designer™ v5.4 or later is the official IDE for CY8C24x23A devices. It provides drag-and-drop hardware configuration, C-code firmware development, and ISSP-based programming via MiniProg1 or MiniProg3. No third-party toolchain is needed - all drivers, libraries, and user module datasheets are included in the free installer.

Does the CY8C24123A-24PXI support true hardware UART with automatic baud rate detection?

No. The CY8C24123A-24PXI implements UART as a digital user module synthesized from its four digital PSoC blocks. It supports standard 8-N-1 framing and programmable baud rates (e.g., 9600, 115200), but lacks automatic baud rate detection or hardware flow control (RTS/CTS). External level-shifting may be required for RS-232 compatibility.

Can the on-chip switch-mode pump (SMP) power both analog and digital sections below 2.4 V?

Yes. The SMP generates an internal boosted voltage (VDDA) that supplies both analog blocks and the digital core when VDD is reduced to 1.0 V. This allows full functionality - including 14-bit ADC operation and 24 MHz CPU execution - at minimum supply, enabling ultra-low-power battery operation without external DC-DC converters.

Is the 14-bit ADC performance affected by temperature or supply variation?

Yes. The 14-bit ADC uses an internal switched-capacitor SAR architecture referenced to the on-chip bandgap. Its effective resolution degrades to ~12 bits across the full –40 °C to +85 °C range and at VDD = 2.4 V due to increased offset drift and reduced SNR. For high-accuracy applications, calibration at operating temperature and voltage is recommended using the built-in self-test (BST) mode.