{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"STM32L422CBT6","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"STM32L422CBT6","canonicalUrl":"https://icboms.com/stmicroelectronics/STM32L422CBT6","factsUrl":"https://icboms.com/api/mcp/products/STM32L422CBT6","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics STM32L4 series ARM Cortex-M4 MCU, STM32L422CBT6, 80 MHz, 128 KB Flash, 40 KB SRAM, 48-LQFP, -40 to 85 °C.","salesMarkdown":"## Core architecture and firmware budget The STM32L422CBT6: For a sensor-fusion algorithm that cycles through a 256-point FFT every 10 ms, the FPU keeps the loop under 80 % CPU load — the rest is available for communication and housekeeping. 128 KB of flash (128K x 8) holds the application image. After the bootloader and a minimal HAL, expect about 100 KB free for the main code. The 40 KB SRAM (40K x 8) is split across the main SRAM1 (32 KB) and SRAM2 (8 KB) with parity; the backup domain retains 2 KB in Vbat mode. DMA transfers and USB buffers share this pool, so budget the heap and stack carefully — a 4 KB USB FIFO leaves 36 KB for data and variables. ## Supply, temperature, and package fit The internal voltage regulator scales down to 1.2 V for the core; at 80 MHz the active current draw is around 100 µA/MHz typical, so a 3.3 V rail at full speed pulls roughly 80 mA. Industrial temperature grade (-40 to 85 °C) covers the majority of factory-floor, outdoor telecom, and automotive cabin applications. The 48-LQFP package (7x7 mm) has a 0.50 mm pitch — a 2-layer board can fan out the inner rows, but a 4-layer stack-up with a solid ground plane underneath the QFP improves decoupling and EMC margin. There is no exposed thermal pad; the die heat conducts through the leadframe and board copper. ## Peripheral set and connectivity The device includes a 10-channel 12-bit ADC (1 Msps max) with oversampling hardware — enough for reading six analog sensors plus two reference channels without an external mux. Connectivity covers I²C, SPI (including Quad SPI for external flash), UART/USART with LIN and IrDA support, and a USB 2.0 full-speed device/host/OTG controller. The Quad SPI interface can memory-map an external NOR flash up to 64 MB, extending the code or data space beyond the on-chip 128 KB. Standard peripherals include a brown-out detect/reset, two DMA controllers (7 channels each), a 16-bit PWM timer with complementary outputs, and an independent watchdog.","metaTitle":"STM32L422CBT6 STM32L4 MCU, 80 MHz Cortex-M4, 128 KB Flash","metaDescription":"STMicroelectronics STM32L422CBT6 ARM Cortex-M4 MCU, 80 MHz, 128 KB Flash, 40 KB SRAM, 48-LQFP. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":"STM32L4","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"STMicroelectronics","Speed":"80MHz","Series":"STM32L4","Package":"Tray","RAM Size":"40K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, DMA, PWM, WDT","Connectivity":"I²C, Infrared, IrDA, LINbus, Quad SPI, SPI, UART/USART, USB","Mounting Type":"Surface Mount","Number of I/O":"38","Core Processor":"ARM® Cortex®-M4","Package / Case":"48-LQFP","Product Status":"Active","Data Converters":"A/D 10x12b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"STM32L422","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"48-LQFP (7x7)","Voltage - Supply (Vcc/Vdd)":"1.71V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.1400","priceTiers":[{"qty":1,"price":"$5.14000","currency":"USD"},{"qty":10,"price":"$4.61600","currency":"USD"},{"qty":25,"price":"$4.36440","currency":"USD"},{"qty":80,"price":"$3.78238","currency":"USD"},{"qty":250,"price":"$3.58844","currency":"USD"},{"qty":500,"price":"$3.21992","currency":"USD"},{"qty":1000,"price":"$2.71559","currency":"USD"},{"qty":2500,"price":"$2.57981","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/08b18385ba7b503452c1da6901f4845f.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/STM32L422CBT6/alternatives.json"},"ai":{"faq":[{"question":"What is STM32L422CBT6's listed speed and series?","answer":"The core runs at 80 MHz and belongs to the STM32L4 series, which is STMicroelectronics' ultra-low-power Cortex-M4 line with FPU and DSP extensions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/STM32L422CBT6","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/STM32L422CBT6 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}}