{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L073RZT3","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L073RZT3","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L073RZT3","factsUrl":"https://icboms.com/api/mcp/products/STM32L073RZT3","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L073RZT3, STM32L0 series, 32-bit ARM Cortex-M0+ MCU, 32 MHz, 192 KB Flash, 20 KB RAM, 6 KB EEPROM, 64-LQFP, -40°C to 125°C.","salesMarkdown":"## 192 KB Flash, 20 KB RAM, 6 KB EEPROM — memory headroom for the firmware stack Program memory is 192 KB of Flash, paired with 20 KB of SRAM and a separate 6 KB EEPROM block. The EEPROM is useful for calibration constants or configuration data that need byte-level writes without wear-leveling overhead. The 20 KB RAM supports moderate data buffering — enough for a USB CDC class or a small RTOS heap — but a design with large frame buffers or heavy audio processing will need to budget carefully. ## 32 MHz ARM Cortex-M0+ with 16-channel ADC and LCD drive The core runs at 32 MHz, which is the speed ceiling for this ultra-low-power family. The integrated LCD driver (up to 8x40 segments) and the USB 2.0 full-speed interface make this a fit for metering, human-machine interface, and portable instrumentation designs. The 64-LQFP package (10x10 mm) with 51 I/Os provides enough GPIO for parallel buses or a keypad matrix without resorting to a larger BGA.","metaTitle":"STM32L073RZT3 STM32L0 MCU, 32 MHz, 192 KB Flash, 64-LQFP","metaDescription":"STMicroelectronics STM32L073RZT3 ARM Cortex-M0+ 32-bit MCU, 32 MHz, 192 KB Flash, 20 KB RAM, 6 KB EEPROM, 64-LQFP, -40°C to 125°C.","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, LCD, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SPI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"51","Core Processor":"ARM® Cortex®-M0+","Package / Case":"64-LQFP","Product Status":"Active","Data Converters":"A/D 16x12b; D/A 2x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L073","Program Memory Size":"192KB (192K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 125°C (TA)","Supplier Device Package":"64-LQFP (10x10)","Voltage - Supply (Vcc/Vdd)":"1.8V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.7300","priceTiers":[{"qty":1,"price":"$6.73000","currency":"USD"},{"qty":10,"price":"$6.08200","currency":"USD"},{"qty":25,"price":"$5.79960","currency":"USD"},{"qty":80,"price":"$5.03563","currency":"USD"},{"qty":230,"price":"$4.80930","currency":"USD"},{"qty":440,"price":"$4.38495","currency":"USD"},{"qty":960,"price":"$3.81917","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/106d684d3945a6b1be3c8ecd66f3e28c.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L073RZT3/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between STM32L073RZT3 and STM32L073RZT6?","answer":"All other specs — 32 MHz core, 192 KB Flash, 20 KB RAM, 64-LQFP package — are identical."},{"question":"Can I replace STM32L073RZT3 with STM32L072RZT3?","answer":"The STM32L072RZT3 is a lower-density sibling with 192 KB Flash and 20 KB RAM but without the 6 KB EEPROM and without the LCD driver. If your firmware relies on the EEPROM block or the LCD segment drive, the L072 will not be a drop-in replacement. Check the memory map and peripheral set before substituting."},{"question":"What is the closest functional second-source for STM32L073RZT3?","answer":"The STM32L151CBU6A is a 32 MHz ARM Cortex-M3 part with similar connectivity (I²C, SPI, USART, USB) and ADC/DAC count, but it lacks the LCD driver and EEPROM block. It is a functional alternative only if those features are not needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L073RZT3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L073RZT3 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}}