{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L4R5AII6P","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L4R5AII6P","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L4R5AII6P","factsUrl":"https://icboms.com/api/mcp/products/STM32L4R5AII6P","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4R5AII6P, ARM Cortex-M4, 32-bit, 120 MHz, 2 MB Flash, 640 KB SRAM, 112 I/O, 169-UFBGA, -40 to 85°C, Tray.","salesMarkdown":"The part integrates a full set of peripherals: CAN, USB OTG, EBI/EMI for external memory or displays, multiple SPI/I2C/SAI audio interfaces, and dual 12-bit DACs plus a 16-channel 12-bit ADC. It is designed for low-power sensor fusion, GUI-driven control panels, and industrial IoT gateways where you need the M4 DSP/FPU throughput without the power budget of a high-performance part. ## Memory and I/O — sizing the firmware and the bus The 2 MB Flash is enough for a full GUI stack with a real-time OS and sensor-processing library; the 640 KB SRAM leaves headroom for double-buffered frame buffers or large data logs. 112 I/Os in a 169-ball BGA means high pinout utilization — you get parallel bus access plus many GPIOs for sensor interrupts and control lines. The EBI/EMI interface can drive external SRAM, NOR Flash, or a parallel LCD controller without bit-banging. ## Package and assembly considerations The 169-UFBGA (7x7 mm) is a fine-pitch BGA — 0.5 mm ball pitch, likely. This is not a hand-solder part; it requires a controlled reflow profile, X-ray inspection for voids and shorts, and a stencil designed for the ball array. MSL is typically 3 for this package family (verify on the reel label). Bake before reflow if the moisture barrier bag has been open past the floor-life window. The small footprint saves board space but demands a multi-layer PCB with via-in-pad or microvias for fan-out. ## Peripheral mix and integration note The connectivity set (CAN, USB OTG, EBI/EMI, SAI, multiple SPI/I2C) covers industrial fieldbus, audio codec interfaces, and external memory expansion. The internal oscillator eliminates a separate crystal for the main clock, though the RTC still needs an external 32.768 kHz crystal for accurate timekeeping. Brown-out detect and POR are on-chip, so external supervisor ICs are optional unless you need a tighter reset threshold.","metaTitle":"ST STM32L4R5AII6P ARM Cortex-M4 MCU, 120 MHz, 2 MB Flash","metaDescription":"STMicroelectronics STM32L4R5AII6P 32-bit MCU, 120 MHz, 2 MB Flash, 640 KB SRAM, 112 I/O, 169-UFBGA, -40 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":"120MHz","Series":"STM32L4R","Package":"Tray","RAM Size":"640K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"CANbus, EBI/EMI, I²C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG","Mounting Type":"Surface Mount","Number of I/O":"112","Core Processor":"ARM® Cortex®-M4","Package / Case":"169-UFBGA","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L4R5","Program Memory Size":"2MB (2M x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"169-UFBGA (7x7)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.3168","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/3911b6923e911f78d930b1bab40f9562.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does STM32L4R5AII6P have 112 I/Os?","answer":"Yes, the STM32L4R5AII6P provides 112 I/Os in its 169-ball UFBGA package, giving high pinout utilization for parallel buses and many sensor inputs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L4R5AII6P","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L4R5AII6P when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T12:40:36.839Z","lastPublished":"2026-07-16T12:40:36.839Z","indexable":true}}