{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S2637-EQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S2637-EQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S2637-EQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S2637-EQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 2000 series LM3S2637-EQC50-A2T, 32-Bit Single-Core MCU, 50MHz, 128KB Flash, 32K x 8 SRAM, CANbus, 46 I/O, -40°C~105°C, 100-LQFP.","salesMarkdown":"## 50MHz Cortex-M3 with CAN — the fit call The 50MHz clock is the headline number — it sets the ceiling for control-loop bandwidth, protocol processing, and general throughput. For a motor-drive or CAN gateway node running a modest protocol stack, 50MHz is adequate; if your application needs floating-point or heavy DSP, you would be looking at a Cortex-M4 or M7 part instead. The CANbus interface plus I2C, SPI, SSI, UART/USART, IrDA, and Microwire connectivity makes this a flexible node controller for industrial automation, building control, or automotive body-electronics modules. With 46 GPIOs in a 100-LQFP package, you have enough pins for a parallel LCD, keypad matrix, and sensor inputs alongside the serial buses. ## Temperature range and supply — the field constraints The supply range is 2.25V to 2.75V — that is a tighter window than the usual 3.3V ±10% rail. Your regulator needs to hold 2.5V within that band across load and temperature; a standard 2.5V LDO with 2% tolerance will work, but check dropout at the low end. The 100-LQFP (14x14 mm) package is a hand-solderable, inspectable footprint — no hot-air station required for rework. If you are swapping this on a customer site, the orientation is obvious: pin 1 chamfer on the top-left corner. Standard ESD handling applies, but the package is robust enough for field replacement with a basic soldering iron and flux. ## What is in the kit — peripherals and memory Four 10-bit ADC channels cover basic analog sensing (potentiometers, thermistors, current shunts).","metaTitle":"LM3S2637-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz","metaDescription":"LM3S2637-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz, 128KB Flash, 32K x 8 SRAM, CAN, 46 I/O, -40 to 105°C, 100-LQFP.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Obsolete","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 2000","Package":"Tape & Reel (TR)","RAM Size":"32K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"CANbus, I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"46","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Product Status":"Obsolete","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S2637","Program Memory Size":"128KB (128K 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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S2637-EQC50-A2T/alternatives.json"},"ai":{"faq":[{"question":"What is the replacement for LM3S2637-EQC50-A2T?","answer":"Texas Instruments has not published a direct pin-compatible replacement. For a drop-in fit, the best option is to source the original part through independent distribution. For a new design, you would evaluate current TI Cortex-M4 or TM4C series parts with CAN and 46+ I/O in a 100-LQFP, but those will require a PCB layout change and firmware port."},{"question":"Can LM3S2637-EQC50-A2T be used as a replacement for LM3S2637-IQC50-A2T?","answer":"The LM3S2637-EQC50-A2T and LM3S2637-IQC50-A2T share the same base part number and core specs — both are 50MHz Cortex-M3 with 128KB Flash and 32K x 8 SRAM. The -EQC can replace the -IQC in any application since its temperature range covers the narrower one. Pinout and footprint are identical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S2637-EQC50-A2T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/LM3S2637-EQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}