{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32F439BIT6J","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32F439BIT6J","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32F439BIT6J","factsUrl":"https://icboms.com/api/mcp/products/STM32F439BIT6J","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32F4 series STM32F439BIT6J, ARM Cortex-M4, 32-bit single-core, 180 MHz, 2 MB Flash, 256K x 8 RAM, 168 I/O, CANbus/Ethernet/USB OTG, 208-LQFP, -40°C to 85°C.","salesMarkdown":"## 180 MHz Cortex-M4 with 2 MB Flash — what the specs mean for the design ## Ethernet, CAN, and the LCD controller — peripheral fit for a system-on-chip The connectivity set is the strongest argument for this part over smaller STM32F4 siblings. Ethernet MAC with dedicated DMA means you can run a lightweight TCP/IP stack without an external PHY management burden — the RMII interface connects directly to a PHY like the LAN8720. Two CAN 2.0B controllers handle the fieldbus side, and the USB OTG FS/HS with on-chip PHY covers device or host roles. The LCD parallel interface supports up to 24-bit RGB, which drives a 480x272 TFT panel directly from the internal SRAM or external NOR/NAND Flash via the FMC. The 12-bit ADC bank has 24 channels, enough for current-sense and temperature monitoring on a three-phase motor drive without external muxing. The base product number STM32F439 spans several density and package variants, so if a future board spin needs a different pin count or temperature grade, the migration stays within the same family without a full software port. ## Package and supply — 208-LQFP layout notes Supply decoupling should follow the STM32F4 reference design: one 100 nF per VDD/VSS pair, plus a 4.7 µF bulk cap near the main supply entry.","metaTitle":"STM32F439BIT6J ARM Cortex-M4 MCU, 180 MHz, 2 MB Flash","metaDescription":"STMicroelectronics STM32F439BIT6J 32-bit MCU with 180 MHz ARM Cortex-M4, 2 MB Flash, 256 KB SRAM, Ethernet, CAN, USB OTG. Industrial temp -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"180MHz","Series":"STM32F4","Package":"Tray","RAM Size":"256K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, I²S, LCD, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, SPI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"168","Core Processor":"ARM® Cortex®-M4","Package / Case":"208-LQFP","Product Status":"Active","Data Converters":"A/D 24x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32F439","Program Memory Size":"2MB (2M x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"208-LQFP (28x28)","Voltage - Supply (Vcc/Vdd)":"1.8V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$19.5523","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7ccff475f92d57ddcb2c7509216e5655.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32F439BIT6J/alternatives.json"},"ai":{"faq":[{"question":"Does STM32F439BIT6J have Ethernet connectivity?","answer":"Yes, the STM32F439BIT6J includes an Ethernet MAC controller with dedicated DMA. It connects to an external PHY via the RMII interface, supporting 10/100 Mbps operation. This is one of the key differentiators versus the STM32F429 series, which lacks the Ethernet peripheral."},{"question":"What is the difference between STM32F439BIT6J and STM32F429BIT6J?","answer":"The primary difference is that the STM32F439 adds a hardware cryptographic processor (AES, 3DES, SHA, MD5) and a true random number generator (TRNG) that the STM32F429 does not include. Both share the same 180 MHz Cortex-M4 core, 2 MB Flash, 256 KB SRAM, and 208-LQFP package, so they are pin-compatible. If your application does not need on-chip crypto acceleration, the STM32F429 is a cost-effective alternative."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32F439BIT6J","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32F439BIT6J when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T18:03:28.771Z","lastPublished":"2026-07-22T18:03:28.771Z","indexable":true}}