{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY8C27543-24AXI","brand":"Infineon Technologies","brandSlug":"infineon","productSlug":"CY8C27543-24AXI","canonicalUrl":"https://icboms.com/infineon/CY8C27543-24AXI","factsUrl":"https://icboms.com/api/mcp/products/CY8C27543-24AXI","rawCanonicalId":null},"summary":{"shortDescription":"Cypress PSoC1 CY8C27xxx CY8C27543-24AXI, 8-Bit M8C MCU, 24MHz, 16KB Flash, 256x8 RAM, 40 I/O, I²C/SPI/UART, 4x14b ADC + 4x9b DAC, 44-TQFP, -40°C to 85°C.","salesMarkdown":"## 24 MHz M8C core with on-chip analog — the PSoC1 mixed-signal MCU The Cypress CY8C27543-24AXI is an 8-bit PSoC1 microcontroller from the CY8C27xxx family, built around the M8C core running at 24 MHz. ## 16 KB Flash, 256 x 8 RAM — sizing the firmware and data footprint With 16 KB of Flash and 256 bytes of RAM, this part targets firmware images that fit a modest control loop, configuration tables, and a small state machine. The 256 x 8 RAM is tight for buffering — a UART receive line at 115200 baud with a 64-byte ring buffer leaves 192 bytes for stack and variables. If your application needs a larger lookup table or a multi-packet serial protocol, the CY8C29566-24AXIT sibling (same 24 MHz M8C core, same 40 I/O, same package footprint) ups the Flash to 32 KB and the RAM to 2 KB, which buys headroom for more complex firmware without changing the board layout.","metaTitle":"Cypress CY8C27543-24AXI PSoC1 MCU, 8-Bit 24MHz, 16KB Flash","metaDescription":"Cypress CY8C27543-24AXI 8-bit PSoC1 MCU with M8C core at 24MHz, 16KB Flash, 256x8 RAM, 4x14b ADC, 4x9b DAC, 40 I/O, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":"PSOC®1 CY8C27xxx","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Speed":"24MHz","Series":"PSOC®1 CY8C27xxx","Package":"Tray","RAM Size":"256 x 8","Core Size":"8-Bit","Peripherals":"POR, PWM, WDT","Connectivity":"I²C, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"40","Core Processor":"M8C","Package / Case":"44-LQFP","Data Converters":"A/D 4x14b; D/A 4x9b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"44-TQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"3V ~ 5.25V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$12.94","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$12.94000","currency":"USD"},{"qty":10,"price":"$11.89100","currency":"USD"},{"qty":25,"price":"$11.39800","currency":"USD"},{"qty":160,"price":"$10.04244","currency":"USD"},{"qty":320,"price":"$9.54956","currency":"USD"},{"qty":480,"price":"$8.93346","currency":"USD"},{"qty":960,"price":"$8.19413","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/d402c25d314e801e736bd9567f91c494.pdf","sourceUrl":null},"ai":{"faq":[{"question":"How many I/O pins does CY8C27543-24AXI have?","answer":"It provides 40 general-purpose I/O lines, accessible on the 44-pin LQFP package. That count is enough to interface with a parallel LCD, a keypad matrix, and a few serial peripherals without needing an I/O expander."},{"question":"What is the closest functional alternative to CY8C27543-24AXI?","answer":"The CY8C29566-24AXIT is a pin-compatible upgrade within the PSoC1 family: same 24 MHz M8C core, same 40 I/O and 44-TQFP footprint, but with 32 KB Flash and 2 KB RAM plus a 12-channel 14-bit ADC. It is a drop-in replacement when firmware and data memory headroom are needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/infineon/CY8C27543-24AXI","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/infineon/CY8C27543-24AXI when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}