Infineon Technologies CY8C24123A-24SXIT

Overview

CY8C24123A-24SXIT from Cypress Semiconductor is a programmable 8-bit Harvard-architecture PSoC® SoC featuring an M8C CPU core running at up to 24 MHz, 4 KB flash, 256 bytes SRAM, six analog PSoC blocks (supporting up to 14-bit ADCs and 9-bit DACs), and four digital PSoC blocks (including UART, SPI, I²C, PWM, and timers). It operates from 2.4 V to 5.25 V across –40 °C to +85 °C and targets embedded sensor interface and mixed-signal control applications.

For engineers reviewing the CY8C24123A-24SXIT datasheet, CY8C24123A-24SXIT pinout, CY8C24123A-24SXIT application, or CY8C24123A-24SXIT equivalent, key selection criteria include its 28-pin SOIC package, 24 MHz internal oscillator accuracy (±5%), configurable GPIO drive modes (25 mA sink), on-chip switch-mode pump for 1.0 V operation, and integrated analog resources including PGA and decimator-based ADC.

Technical Context

The device implements a fixed-function M8C CPU core with Harvard architecture, supporting 8×8 multiply and 32-bit accumulate operations. Its clock system integrates a ±5% 24 MHz IMO, optional 32.768 kHz ECO with PLL for crystal-accurate 24 MHz generation, and an ILO for low-power sleep timing.

Analog signal processing relies on six rail-to-rail configurable analog blocks-each capable of PGA, comparator, filter, or DAC functions-with eight standard analog inputs routed to all GPIOs and four additional analog inputs with restricted routing. Digital peripherals are built from four 8-bit digital blocks combinable into 8–32-bit timers, PWMs, CRC, PRS, and full-duplex UART.

Key Specifications

Pinout & Package

CY8C24123A-24SXIT is housed in a 28-pin SOIC (Small Outline Integrated Circuit) package with 300 mil body width, JEDEC MS-012AC compliant, and RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C24223A-24SXIT and CY8C24423A-24SXIT, the CY8C24123A-24SXIT provides minimal-cost entry into PSoC 1 architecture with verified 4 KB flash sufficiency for basic CapSense, sensor readout, and motor control firmware-ideal for cost-sensitive, volume OEM designs where I/O and memory headroom are tightly constrained.

Availability

CY8C24123A-24SXIT is available at Aetrix Electronics and suitable for capacitive touch interfaces, industrial sensor nodes, low-power motor control, and programmable power sequencers requiring stable component supply and long-term industrial lifecycle support.

Supply support for CY8C24123A-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, USB controllers, memory, and connectivity products.

The CY8C24x23A series belongs to the PSoC 1 family-designed specifically for cost-sensitive, low-power mixed-signal embedded applications requiring configurable analog and digital peripherals in a single chip.

FAQ

What development tools are required to program CY8C24123A-24SXIT?

PSoC Designer™ (free Windows IDE) is mandatory for hardware configuration and firmware development. Programming requires CY8CKIT-002 MiniProg3 or CY3217-MiniProg1; both support ISSP via SWD pins. The device does not support JTAG. PSoC Designer generates configuration files that define analog/digital block interconnects and GPIO mappings before compilation.

Does CY8C24123A-24SXIT support true 14-bit ADC resolution?

Yes-the decimator-based SAR ADC achieves effective 14-bit resolution at 100 SPS with internal reference and proper layout. Resolution degrades to 12 bits at 1 kSPS and 10 bits at 10 kSPS due to oversampling trade-offs. External reference input (VREFH/VREFL) enables ratiometric measurements but does not extend resolution beyond datasheet-specified ENOB limits.

Can the on-chip switch-mode pump (SMP) power analog blocks during 1.0 V operation?

Yes-the SMP generates an internal 3.3 V rail that powers the analog subsystem-including PGAs, ADCs, and DACs-while the core runs at 1.0 V. This maintains full analog performance (e.g., 14-bit ADC linearity, PGA gain accuracy) even below 2.4 V nominal supply, verified across –40 °C to +85 °C per datasheet Section 19.

Is I²C multi-master mode supported in hardware or firmware?

I²C multi-master arbitration is implemented in dedicated hardware within the digital block, requiring no firmware intervention. The module handles START/STOP collision detection, bus arbitration, and clock stretching automatically. Firmware only configures address, speed (100/400 kHz), and data buffer pointers-no bit-banging or state-machine code is needed for multi-master operation.