{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C21434-24LQXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C21434-24LQXI","canonicalUrl":"https://icboms.com/infineon/CY8C21434-24LQXI","factsUrl":"https://icboms.com/api/mcp/products/CY8C21434-24LQXI","rawCanonicalId":null},"summary":{"shortDescription":"Infineon/Cypress PSoC®1 CY8C21xxx series, CY8C21434-24LQXI, 8-Bit M8C MCU, 24 MHz, 8 KB Flash, 28 I/O, I²C/SPI/UART/USART, 2.4 V supply, -40°C to 85°C, 32-QFN Tray.","salesMarkdown":"## 8-bit M8C at 24 MHz with 8 KB Flash — what this PSoC 1 brings to a control board The Infineon (formerly Cypress) CY8C21434-24LQXI is an 8-bit PSoC 1 microcontroller from the CY8C21xxx family, built around the proprietary M8C core clocked at 24 MHz. ## Flash endurance and retention — what the 8 KB means for a ten-year field life The 8 KB of on-chip Flash is the firmware store, not a data logger. For a control application that boots from fixed code and only updates firmware a handful of times over the product's service life, the PSoC 1 Flash endurance (typically 100k program/erase cycles per sector, though not explicitly stated in this part's brief) is more than adequate. No external ECC is required for the internal Flash — the M8C core handles single-bit errors transparently. For designs that need to store calibration constants or configuration tables, the 8-bit ADC's 28-channel mux lets you digitize analog trim values and keep them in the Flash, but remember that each write cycle consumes one P/E cycle from the sector. Plan your wear-leveling strategy if the system writes to the same Flash address more than a few thousand times. ## 28 I/O and the 8-bit ADC — sizing the analog front end Twenty-eight I/O pins on a 32-pin QFN leaves limited headroom for external passives, but the PSoC 1 architecture compensates by integrating configurable analog blocks. The 28-input, 8-bit ADC can scan up to 28 single-ended analog channels without an external mux — enough for a bank of thermistors, potentiometers, or current-sense resistors in a motor-drive or industrial-control panel. Each I/O can also serve as a digital input or output, PWM output, or serial-interface pin.","metaTitle":"CY8C21434-24LQXI PSoC 1 8-bit MCU, 24 MHz, 8 KB Flash","metaDescription":"Infineon/Cypress PSoC 1 CY8C21xxx 8-bit M8C MCU at 24 MHz with 8 KB Flash, 28 I/O, I²C/SPI/UART, 2.4 V supply, -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":"CY8C21434","cpu_core":"M8C","frame_size":"8-Bit","fuse_speed":"24 MHz","connectivity":"I²C, SPI, UART/USART","package_type":"Tray","Number Of I/O":"28","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":"$3.85","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY8C21434-24LQXI/alternatives.json"},"ai":{"faq":[{"question":"Can CY8C21434-24LQXI be programmed with PSoC Programmer?","answer":"Yes. The CY8C21434-24LQXI is a PSoC 1 device and is supported by Cypress's PSoC Programmer software and the MiniProg3 or MiniProg4 hardware debug/programming tools. The M8C core uses a proprietary SWD-like interface for programming and debugging. The 8 KB Flash is programmed via the device's serial-wire debug (SWD) pins, which are shared with general-purpose I/O after programming."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C21434-24LQXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C21434-24LQXI 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}}