{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"S9S12C128J2CFUE","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"S9S12C128J2CFUE","canonicalUrl":"https://icboms.com/nxp/S9S12C128J2CFUE","factsUrl":"https://icboms.com/api/mcp/products/S9S12C128J2CFUE","rawCanonicalId":null},"summary":{"shortDescription":"NXP HCS12 series, S9S12C128J2CFUE, 16-bit MCU, 50MHz, 128KB Flash, 4K x 8 RAM, 60 I/O, CANbus, SCI, SPI, 2.35V-2.75V, -40°C to 85°C, 80-QFP.","salesMarkdown":"## 16-bit HCS12 MCU with 128 KB Flash — what it is and where it fits The NXP S9S12C128J2CFUE is a 16-bit HCS12 microcontroller clocked at 50 MHz, with 128 KB of Flash program memory and 4K x 8 of RAM. It packs 60 general-purpose I/O lines, a CANbus interface alongside SCI and SPI serial links, and an 8-channel 10-bit ADC. The part is housed in an 80-pin QFP (14x14 mm body) and operates from a 2.35 V to 2.75 V supply over the -40°C to 85°C industrial temperature range. Typical applications include automotive body electronics (non-safety-rated), industrial control nodes, and CAN-based sensor aggregation — anything that needs a proven 16-bit core with on-chip CAN and a moderate peripheral set. ## On-chip CAN and peripheral mix The CANbus module is the main differentiator here — it lets this MCU sit directly on a vehicle or industrial CAN network without an external transceiver (though you still need a CAN PHY). The SCI and SPI ports handle legacy UART and sensor/peripheral links. The 8-channel 10-bit ADC is adequate for reading potentiometers, temperature sensors, or current shunts at moderate update rates. POR, PWM, and WDT peripherals are on-die, reducing external component count. ## Lifecycle and sourcing posture That means it remains a safe choice for new designs and ongoing production BOMs.","metaTitle":"NXP S9S12C128J2CFUE HCS12 MCU, 16-bit, 50MHz, 128KB Flash","metaDescription":"NXP S9S12C128J2CFUE 16-bit HCS12 MCU: 50MHz core, 128KB Flash, 4K x 8 RAM, 60 I/O, CAN/SCI/SPI, -40 to 85°C.","metaKeywords":null},"attributes":{"series":"HCS12","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Speed":"50MHz","Series":"HCS12","Package":"Bulk","RAM Size":"4K x 8","Core Size":"16-Bit","Peripherals":"POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, SCI, SPI","Mounting Type":"Surface Mount","Number of I/O":"60","Core Processor":"HCS12","Package / Case":"80-QFP","Data Converters":"A/D 8x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"80-QFP (14x14)","Voltage - Supply (Vcc/Vdd)":"2.35V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$11.54","stockQuantity":0,"priceTiers":[{"qty":26,"price":"$11.54000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/719e17db8cbff3b3794d49620736cd27.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the equivalent of S9S12C128J2CFUE?","answer":"The MK51DX128CMC7 is a peer from NXP's Kinetis K5x series with a 72 MHz ARM Cortex-M4 core, but it is not pin-compatible and runs on a different architecture. For a drop-in replacement, stick with the HCS12 family — the S9S12C128J2CFU (same die, different package variant) is the closest alternate within the same series."},{"question":"Can I replace S9S12C128J2CFUE with S9S12C128J2CFU?","answer":"The S9S12C128J2CFU is the same HCS12 MCU in a different package variant. Verify the package / case and pinout match your PCB footprint before substituting — the 'UE' suffix indicates the 80-QFP (14x14 mm) package."},{"question":"What is S9S12C128J2CFUE's listed speed?","answer":"The core is rated at 50 MHz. That is the maximum clock frequency for the HCS12 CPU — bus timing and peripheral clock dividers are derived from this."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/S9S12C128J2CFUE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/S9S12C128J2CFUE 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}}