{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L071KZU3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L071KZU3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L071KZU3","factsUrl":"https://icboms.com/api/mcp/products/STM32L071KZU3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L0 series, STM32L071KZU3, ARM Cortex-M0+, 32-Bit Single-Core, 32MHz, 192KB Flash, 20K x 8 RAM, 6K x 8 EEPROM, 25 I/O, 1.65V-3.6V, -40°C to 125°C, 32-UFQFN Exposed Pad, Tray.","salesMarkdown":"## 32 MHz Cortex-M0+ with 192 KB Flash — the ultra-low-power workhorse It runs at 32 MHz and packs 192 KB of Flash program memory, 20 KB of SRAM, and 6 KB of true EEPROM — enough for moderate sensor fusion, data logging, or wireless protocol stacks without external storage. The 32-UFQFN package with exposed pad (5x5 mm footprint) keeps board area tight while the thermal pad helps pull heat from the core during sustained operation. ## Temperature grade and supply — rated for harsh environments The 1.65 V minimum supply is low enough to run on a near-depleted Li-SOCl₂ cell, while the 3.6 V ceiling covers standard 3.3 V and 3.0 V rails with margin. Brown-out detect and POR are integrated, so the reset circuit on the board can be minimal — just a decoupling cap and the external reset pin pulled high. ## Memory configuration — Flash, SRAM, and EEPROM sizing The 20 KB SRAM is adequate for moderate data buffers; if your application needs larger frame buffers or a heavy TCP/IP stack, you will want to check the RAM budget early. The 6 KB EEPROM is a standout: true byte-addressable, 100k-cycle endurance EEPROM on-chip, not emulated Flash. That means configuration parameters, calibration constants, and fault logs survive without wear-leveling code or external serial EEPROM. For designs that log data frequently, this saves both firmware complexity and a component slot. For a production BOM, this means you can qualify the part now without planning a respin for an impending discontinuation. If you are dual-sourcing, the STM32L151CBU6A (Cortex-M3, 32 MHz, 37 I/O, -40°C to 85°C) is a functional alternative in a similar UFQFPN package, though the core architecture and I/O count differ — review the peripheral set and memory map before substituting.","metaTitle":"STM32L071KZU3 STM32L0 MCU, ARM Cortex-M0+, 32 MHz","metaDescription":"STM32L071KZU3 32-bit MCU with ARM Cortex-M0+ core at 32 MHz, 192 KB Flash, 20 KB RAM, 6 KB EEPROM, -40°C to 125°C, 32-UFQFPN. Active, ROHS3.","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":"Tray","RAM Size":"20K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"6K x 8","Peripherals":"Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT","Connectivity":"I²C, IrDA, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"25","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":"STM32L071","Program Memory Size":"192KB (192K 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":"$5.7400","priceTiers":[{"qty":1,"price":"$5.74000","currency":"USD"},{"qty":10,"price":"$5.15400","currency":"USD"},{"qty":25,"price":"$4.87200","currency":"USD"},{"qty":80,"price":"$4.22238","currency":"USD"},{"qty":230,"price":"$4.00587","currency":"USD"},{"qty":440,"price":"$3.59445","currency":"USD"},{"qty":945,"price":"$3.03147","currency":"USD"},{"qty":2940,"price":"$2.87990","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/22d621a76748b868dc4a8fc30085ea48.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L071KZU3/alternatives.json"},"ai":{"faq":[{"question":"How much EEPROM does STM32L071KZU3 have, and is it real EEPROM?","answer":"It has 6 KB of true EEPROM (6K x 8), not emulated Flash. This provides byte-addressable, 100k-cycle endurance storage for configuration data and logs without requiring external EEPROM or wear-leveling in firmware."},{"question":"What is the replacement or equivalent for STM32L071KZU3?","answer":"However, the core architecture (M0+ vs M3), memory sizes, and peripheral set differ — review the datasheet before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L071KZU3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L071KZU3 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}}