{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L011K4U3TR","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L011K4U3TR","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L011K4U3TR","factsUrl":"https://icboms.com/api/mcp/products/STM32L011K4U3TR","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L011K4U3TR, STM32L0 series, 32-bit ARM Cortex-M0+ MCU, 32 MHz, 16 KB Flash, 2K x 8 SRAM, 512 x 8 EEPROM, 1.65V–3.6V, -40 to 125°C, 32-UFQFN exposed pad.","salesMarkdown":"It runs at 32 MHz and integrates 16 KB of Flash program memory, 2 KB of SRAM, and 512 bytes of EEPROM on a single die. ## 1.65 V minimum supply — battery-operated design fit The 1.65 V minimum Vcc is the standout feature for energy-harvesting or single-cell battery applications. Many competing ultra-low-power MCUs require a minimum of 1.8 V or 2.0 V, which forces a boost converter or a second cell. Here, the MCU runs directly from a nearly depleted alkaline cell (nominal 1.5 V, end-of-life ~0.9 V) through a small boost stage, or from a LiFePO4 cell at 3.2 V. The 3.6 V maximum also covers 3.7 V Li-ion without a regulator, though a series diode may be needed for reverse-polarity protection. ## 16 KB Flash, 2 KB SRAM — firmware budget With 16 KB of Flash and 2 KB of SRAM, this part targets small-footprint firmware: a bootloader, a Modbus or I²C sensor driver, a PID loop, and a few hundred bytes of state variables fit comfortably. The 512-byte EEPROM block is useful for calibration constants or configuration parameters that survive a firmware update. For applications requiring a TCP/IP stack or a full RTOS, the sibling STM32L031 with 32 KB Flash is a more appropriate choice. ## 32-UFQFN exposed pad — layout and thermal management The 32-UFQFN package with exposed pad (5x5 mm body) is a compact footprint for space-constrained PCBs. The 28 I/O lines include up to 10 analog inputs (12-bit ADC), I²C, SPI, and UART interfaces, which cover most sensor-interfacing and low-speed communication needs. The base product number STM32L011 covers multiple density and package variants, so a pin-compatible upgrade path exists within the family if firmware requirements grow.","metaTitle":"STM32L011K4U3TR ARM Cortex-M0+ MCU, 32 MHz, 16 KB Flash","metaDescription":"STMicroelectronics STM32L011K4U3TR 32-bit MCU, ARM Cortex-M0+ core at 32 MHz, 16 KB Flash, 2 KB SRAM, 512 B EEPROM. 1.65V–3.6V supply, -40 to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"32MHz","Series":"STM32L0","Package":"Tape & Reel (TR)","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":"28","Core Processor":"ARM® Cortex®-M0+","Package / Case":"32-UFQFN Exposed Pad","Product Status":"Active","Data Converters":"A/D 10x12b","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":"32-UFQFPN (5x5)","Voltage - Supply (Vcc/Vdd)":"1.65V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0205","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/186ae0e234bc3e91c5436123bd03d6e8.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to STM32L011K4U3TR?","answer":"The STM32L011K4U3TR is the lower-density, lower-power entry point; the STM32L031 adds memory headroom for more complex firmware at a slightly higher active current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L011K4U3TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L011K4U3TR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T12:35:43.994Z","lastPublished":"2026-07-16T12:35:43.994Z","indexable":true}}