{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C21234B-24SXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C21234B-24SXI","canonicalUrl":"https://icboms.com/infineon/CY8C21234B-24SXI","factsUrl":"https://icboms.com/api/mcp/products/CY8C21234B-24SXI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon/Cypress PSOC®1 CY8C21xxx series, CY8C21234B-24SXI, 8-Bit M8C MCU, 24 MHz, 8KB FLASH, 16-SOIC, 12 I/O, I²C/SPI/UART, 2.4V supply, -40 to 85°C.","salesMarkdown":"## 8 KB Flash on an 8-bit M8C core — what that means for firmware strategy The Infineon (formerly Cypress) CY8C21234B-24SXI is a PSOC®1 CY8C21xxx series 8-bit MCU built around the M8C core running at 24 MHz, with 8 KB of Flash program memory in a 16-pin SOIC package. The 8 KB Flash is sized for single-purpose control loops — think sensor calibration tables, motor commutation profiles, or a small state machine — not a full RTOS stack. Budget the P/E cycles: Cypress rates this family for 100k erase/write cycles per sector, which is fine for OTA staging if you wear-level the config block, but treat the code space as write-once in production unless your update scheme is infrequent. ## 2.4 V supply and 12 I/O — the low-voltage sensor interface The 12 general-purpose I/O pins are multiplexed with the 28-channel 8-bit ADC, so you trade analog inputs against digital lines. ## 28x8b ADC — resolution versus channel count trade-off The 28-channel 8-bit ADC is the standout mixed-signal feature on a 16-pin package. Eight-bit resolution (256 counts) is adequate for threshold detection, potentiometer readback, or temperature monitoring where 1°C resolution is enough — but don't plan on precision weigh-scale or audio capture. The real value is the channel count: you can monitor up to 28 analog signals (temperature, pressure, position) through the multiplexer, which is unusual for an 8-bit MCU in this footprint. That means no last-time-buy window to track, no end-of-life scramble for a replacement. ## I²C, SPI, UART — the serial interface mix With only 12 I/O, share the SPI bus across multiple slaves and use the UART as a dedicated debug channel. The POR, PWM, and WDT peripherals are on-chip, so you don't need external supervisor ICs for basic watchdog or power-on reset.","metaTitle":"CY8C21234B-24SXI PSOC1 8-Bit MCU, 24 MHz, 8KB Flash, 16-SOIC","metaDescription":"Infineon/Cypress CY8C21234B-24SXI PSOC®1 M8C 8-bit MCU, 24 MHz, 8KB Flash, 2.4V supply, 12 I/O, 28x8b ADC, -40 to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"series":"PSOC®1 CY8C21xxx","has_mpn":"CY8C21234","cpu_core":"M8C","frame_size":"8-Bit","fuse_speed":"24 MHz","connectivity":"I²C, SPI, UART/USART","package_type":"Tube","Number Of I/O":"12","mounting_type":"Surface Mount","product_status":"Active","Data Converters":"A/D 28x8b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","peripheral_types":"POR, PWM, WDT","supply_voltage_v":"2.4","Program Memory Type":"FLASH","Operating Temperature High":"-40°C to 85°C (TA)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.12","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/e27a39065985dded2b4fbf00c4df899a.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY8C21234B-24SXI/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C21234B-24SXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C21234B-24SXI when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}