Infineon Technologies CY8C24123-24SIT

Overview

CY8C24123-24SIT from Cypress Semiconductor is a PSoC™ (Programmable System-on-Chip) mixed-signal array featuring an 8-bit M8C CPU core, 2 KB flash program memory, 256 bytes SRAM, and configurable analog/digital blocks including two 8-bit ADCs, one 8-bit DAC, four comparators, and eight digital PSoC Blocks. It operates at up to 24 MHz with internal IMO clock and supports 5 V operation. Used in embedded sensor interface and industrial control subsystems requiring reconfigurable signal conditioning.

For engineers reviewing the CY8C24123-24SIT datasheet, CY8C24123-24SIT pinout, CY8C24123-24SIT application, or CY8C24123-24SIT equivalent, key selection criteria include flash/SRAM size, analog block count, I/O drive strength (25 mA sink/source), operating voltage range (4.75–5.25 V), and package compatibility (28-pin SOIC).

Technical Context

This device integrates a hardwired 8-bit M8C CPU with programmable analog and digital user modules mapped onto a configurable interconnect matrix. Core timing derives from a trimmable 24 MHz internal main oscillator (IMO), optionally multiplied via PLL or disciplined by external 32 kHz crystal (ECO) for low-power sleep modes.

Analog resources include two independent 8-bit successive-approximation ADCs (up to 100 kSPS), one 8-bit current-output DAC, four rail-to-rail comparators with hysteresis, and programmable op-amp configurations. Digital resources comprise eight Universal Digital Blocks (UDBs) supporting PWM, counters, timers, and state machines.

Key Specifications

Pinout & Package

Package: 28-pin SOIC (Small Outline Integrated Circuit), 300 mil width, JEDEC MS-012AC compliant, surface-mountable with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY8C24223-24SXI, this part trades flash/SRAM headroom and extended temp rating for lower cost and proven qualification in legacy 5 V systems; versus CY8C27443-24PVXI, it offers drop-in SOIC compatibility and simpler qualification path but lacks resolution and memory for next-gen features.

Availability

CY8C24123-24SIT is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostats, portable data loggers, and motor feedback interfaces requiring stable component supply across multi-year production cycles.

Supply support for CY8C24123-24SIT 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 and digital ICs for embedded control, offering PSoC architecture since 2002.

The CY8C24xxx series targets cost-sensitive, 5 V industrial and consumer control applications where analog integration, low-power sleep, and field-programmable logic reduce system complexity without requiring ARM-class processing.

FAQ

Is CY8C24123-24SIT pin-compatible with other CY8C24xxx devices?

Yes, all CY8C24xxx variants-including CY8C24223 and CY8C24423-in 28-pin SOIC share identical pinouts and electrical characteristics. Firmware and hardware layouts are interchangeable provided flash/SRAM usage stays within the 2 KB/256-byte limits of the CY8C24123.

Does CY8C24123-24SIT support USB communication?

No. While P0[0]–P0[3] and P2[0]–P2[1] can be routed to USB transceiver logic in higher-density CY8C24xxx parts, the CY8C24123 lacks the internal USB physical layer and associated firmware modules. External USB-UART bridge ICs are required for host connectivity.

What is the maximum ADC sampling rate achievable on CY8C24123-24SIT?

The dual 8-bit SAR ADCs support up to 100 kSPS total aggregate sampling rate. With single-channel continuous conversion and IMO clocked at 24 MHz, practical sustained throughput is 80 kSPS per ADC when using internal reference and no oversampling-verified in Cypress Application Note AN2221.

Can the internal 24 MHz IMO be used as the system clock without calibration?

Yes, but with ±2% initial tolerance at 25°C. For applications requiring tighter timing-such as UART baud generation or precise PWM duty cycle-the IMO must be trimmed using the onboard SROM calibration routine or external reference, achieving ±0.5% stability over temperature.