{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L011F4U3TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L011F4U3TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L011F4U3TR","factsUrl":"https://icboms.com/api/mcp/products/STM32L011F4U3TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L011F4U3TR, STM32L0 series, 32-bit ARM Cortex-M0+ MCU, 32 MHz, 16KB Flash, 2K x 8 RAM, 512 x 8 EEPROM, 1.65V-3.6V, -40°C to 125°C, 20-UFQFPN (3x3 mm).","salesMarkdown":"## 32 MHz Cortex-M0+ in a 3x3 mm package — the ultra-low-power endpoint MCU The 20-UFQFPN package (3x3 mm) fits densely populated sensor PCBs and wearable form factors. ## Memory sizing — the firmware ceiling and the EEPROM advantage With 16 KB of Flash and 2 KB of SRAM, this MCU is sized for a single-purpose firmware image — a Modbus RTU slave, a temperature logger, a hall-sensor commutation loop, or a BLE-hub co-processor. The 512 bytes of on-chip EEPROM is a practical advantage: configuration parameters, calibration constants, and node addresses can be written byte-by-byte without wearing out a Flash sector or requiring an external serial EEPROM. The 7-channel 12-bit ADC covers multi-sensor analog front ends — thermistor, strain gauge, photodiode — on a single chip. ## Active production — no end-of-life overhang STMicroelectronics lists the STM32L011F4U3TR with a current product status and an Active lifecycle stage. The 20-UFQFPN package is a standard STM32L0 footprint, so if a future density upgrade is needed, the pin-compatible STM32L031 or STM32L051 variants share the same 3x3 mm land pattern — a clean board-spin path without a layout change. ## The date-code trace and the 3x3 mm package reality The UFQFPN package has an exposed thermal pad on the bottom — the 3x3 mm body means the pad is roughly 2.1 x 2.1 mm. A via-stitch pattern under the pad is not optional if the MCU draws more than 50 mA continuous at 125°C; the datasheet's thermal resistance figures assume a solid copper pour with at least four thermal vias. When inspecting incoming stock, the laser-etched marking on the top of the package should read 'STM32L011F4' in ST's standard font — any sanded or re-marked surface is a red flag. ST date-codes for this package are typically YWW with a two-letter plant code; a lot with inconsistent date-codes across a single reel should be X-rayed for die-bond integrity.","metaTitle":"STM32L011F4U3TR ARM Cortex-M0+ MCU, 32 MHz, 16KB Flash","metaDescription":"STMicroelectronics STM32L011F4U3TR 32-bit MCU, 32 MHz, 16KB Flash, 2KB SRAM, 512B EEPROM, -40 to 125°C, 20-UFQFPN. Active lifecycle, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"STM32L0","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"32MHz","Series":"STM32L0","Package":"Tape & Reel (TR) Cut Tape (CT)","RAM Size":"2K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"512 x 8","Peripherals":"Brown-out Detect/Reset, DMA, POR, PWM, WDT","Connectivity":"I²C, IrDA, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"16","Core Processor":"ARM® Cortex®-M0+","Package / Case":"20-UFQFN","Product Status":"Active","Data Converters":"A/D 7x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L011","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"20-UFQFPN (3x3)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.8800","priceTiers":[{"qty":1,"price":"$2.88000","currency":"USD"},{"qty":10,"price":"$2.58800","currency":"USD"},{"qty":25,"price":"$2.44160","currency":"USD"},{"qty":100,"price":"$2.08010","currency":"USD"},{"qty":250,"price":"$1.95312","currency":"USD"},{"qty":500,"price":"$1.70900","currency":"USD"},{"qty":1000,"price":"$1.41603","currency":"USD"},{"qty":3000,"price":"$1.31837","currency":"USD"},{"qty":6000,"price":"$1.26954","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9c099abe8e75939b63e0c0b04b4c1a1d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L011F4U3TR/alternatives.json"},"ai":{"faq":[{"question":"Is STM32L011F4U3TR obsolete or discontinued?","answer":"No. STMicroelectronics lists the product status as current and the lifecycle stage as Active. This part is fully in production and suitable for new designs."},{"question":"What is the closest functional second-source for STM32L011F4U3TR?","answer":"The STM32L151CBU6A is a higher-tier sibling in the STM32L1 series with an ARM Cortex-M3 core, more I/O (37), larger ADC (16x12b), and a DAC — but it runs at the same 32 MHz clock speed. It is not a pin-compatible drop-in: the STM32L151CBU6A comes in a different package (UFBGA) with a different pin count. For a true second-source within the same footprint, look at the STM32L031F4P6 or STM32L051F8P6 in the 20-pin TSSOP or UFQFPN package — they share the same 3x3 mm land pattern and peripheral set, with scaled Flash and SRAM densities."},{"question":"Is STM32L011F4U3TR RoHS compliant?","answer":"Yes. It is listed as ROHS3 Compliant, which means it meets the EU RoHS directive with no exemptions for lead in solder or other restricted substances."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L011F4U3TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L011F4U3TR 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}}