{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MC9S08SH8MFK","brand":"NXP Semiconductors","brandSlug":"nxp","productSlug":"MC9S08SH8MFK","canonicalUrl":"https://icboms.com/nxp/MC9S08SH8MFK","factsUrl":"https://icboms.com/api/mcp/products/MC9S08SH8MFK","rawCanonicalId":null},"summary":{"shortDescription":"NXP S08 8-bit microcontroller, MC9S08SH8MFK, 40 MHz core, 8 KB Flash, 512-byte RAM, 12-channel 10-bit ADC, 24-QFN 4x4 mm, -40°C to 125°C.","salesMarkdown":"## 40 MHz S08 core with 8 KB Flash — what the memory budget buys The MC9S08SH8MFK: That memory envelope fits a single control loop — say, a brushless-DC commutation routine plus a LINbus status-report task — without external storage. The 512-byte RAM holds about 256 16-bit variables, enough for a PID coefficient set and a 32-sample sensor buffer. The internal oscillator trims to the core clock, saving the crystal and its two load capacitors from the BOM. ## Industrial temperature grade and peripheral set — where it fits The on-chip LVD (low-voltage detect) and POR (power-on reset) keep the core from browning out during a cold-crank dip; the watchdog timer (WDT) catches firmware hangs without an external supervisor IC. The 12-channel 10-bit ADC samples analog inputs — thermistor, potentiometer, current-sense resistor — at up to the core rate. The I²C and SPI ports talk to external sensors or an EEPROM; the LINbus interface connects to a vehicle body-control module without an external transceiver on the MCU side (the LIN physical layer still needs a transceiver IC). ## Active lifecycle and compliance — no design-in risk The ROHS3 exemption-free status means no supply-chain discontinuity from a substance restriction change. The S08 family has been in production for over a decade; the toolchain (CodeWarrior, MCUExpresso, third-party C compilers) is mature and the part is second-sourced through multiple distribution channels. No pin-compatible successor has been announced — the 40 MHz S08 core at this Flash/RAM density is the current sweet spot for cost-sensitive 8-bit applications.","metaTitle":"MC9S08SH8MFK 8-bit MCU, 40 MHz, 8 KB Flash, 24-QFN","metaDescription":"NXP MC9S08SH8MFK S08 MCU: 40 MHz core, 8 KB Flash, 512-byte RAM, 12x10b ADC, -40°C to 125°C, 24-QFN. Active lifecycle, ROHS3. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":"S08","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"40MHz","Series":"S08","Package":"Bulk","RAM Size":"512 x 8","Core Size":"8-Bit","Peripherals":"LVD, POR, PWM, WDT","Connectivity":"I²C, LINbus, SCI, SPI","Mounting Type":"Surface Mount","Number of I/O":"17","Core Processor":"S08","Package / Case":"24-UFQFN Exposed Pad","Data Converters":"A/D 12x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Program Memory Size":"8KB (8K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"24-QFN (4x4)","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.87","stockQuantity":0,"priceTiers":[{"qty":171,"price":"$1.87000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e49bdc0acca220b22a7b204b731eff2f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative to MC9S08SH8MFK?","answer":"It offers 16 KB Flash (double the SH8's 8 KB) and 38 I/O in a 48-pin package — a board layout change is required because the pinout and footprint differ from the 24-QFN."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/nxp/MC9S08SH8MFK","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/nxp/MC9S08SH8MFK 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}}