{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1133-EQC50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1133-EQC50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1133-EQC50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1133-EQC50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series 32-bit MCU, LM3S1133-EQC50-A2, 50 MHz, 64 KB Flash, 16 KB RAM, 100-LQFP, -40 to 105°C, Tray.","salesMarkdown":"Texas Instruments has marked the LM3S1133-EQC50-A2 as obsolete. No pin-compatible direct replacement exists from TI; a board-level redesign to a current Cortex-M3 or Cortex-M4 part is the migration path for new production. The LM3S1133-EQC50-A2 runs a 32-bit ARM Cortex-M3 core at 50 MHz. On-chip memory consists of 64 KB of Flash and 16 KB of SRAM. For a control-loop application with a moderate stack and a few KB of data buffers, the 16 KB RAM leaves room for the HAL and RTOS footprint — but a firmware image that approaches the 64 KB Flash ceiling will need code-size optimization or a move to a larger part. The 2.25 V to 2.75 V supply rail means this MCU runs from a 2.5 V rail, not the common 3.3 V — the regulator choice and decoupling plan must account for this. ## Industrial temperature grade and 100-LQFP package The 44 general-purpose I/O cover a typical sensor-and-actuator interface: a dozen digital inputs, a dozen outputs, plus the serial bus pins. The Stellaris Cortex-M3S 1000 series peripheral set includes I²C, SPI, SSI, UART/USART, IrDA, and Microwire serial interfaces — enough to talk to common sensor modules, serial Flash, and industrial protocol ASICs. On-chip data conversion comes from two 10-bit ADC channels. Built-in brown-out detect, POR, PWM, and a watchdog timer reduce external supervisor IC count. The internal oscillator saves a crystal on boards where ±1% accuracy is acceptable, though a precision clock source is still needed for UART baud-rate tolerance at higher speeds.","metaTitle":"TI LM3S1133-EQC50-A2 MCU, 50 MHz, 64 KB Flash, 100-LQFP","metaDescription":"Texas Instruments LM3S1133-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash, 16 KB RAM, 100-LQFP, -40 to 105°C. Obsolete — sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Speed":"50MHz","title":"LM3S1133-EQC50-A2","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tray","RAM Size":"16K x 8","Core Size":"32-Bit Single-Core","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"44","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Data Converters":"A/D 2x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1133","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C ~ 105°C (TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.7500","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/56d7fbb04fef075cf8f60beb47636306.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1133-EQC50-A2/alternatives.json"},"ai":{"faq":[{"question":"Is the LM3S1133-EQC50-A2 obsolete?","answer":"Yes, Texas Instruments has marked the LM3S1133-EQC50-A2 as obsolete."},{"question":"What is the replacement for LM3S1133-EQC50-A2?","answer":"Texas Instruments has not published an official successor order code for the LM3S1133-EQC50-A2. A board-level redesign to a current Cortex-M3 or Cortex-M4 MCU from the TI Tiva C series or a comparable vendor is the migration path for new production."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1133-EQC50-A2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S1133-EQC50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:40:03.789Z","lastPublished":"2026-07-21T02:40:03.789Z","indexable":true}}