{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1635-IBZ50-A2","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1635-IBZ50-A2","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1635-IBZ50-A2","factsUrl":"https://icboms.com/api/mcp/products/LM3S1635-IBZ50-A2","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series MCU, LM3S1635-IBZ50-A2, 32-Bit Single-Core, 50MHz, 128KB Flash, 32K x 8 RAM, 56 I/O, 108-LFBGA, -40°C~85°C, Tray.","salesMarkdown":"The LM3S1635-IBZ50-A2: For a BOM that already carries this order code, the NRND status does not force an immediate redesign, but it does mean the procurement team should lock in a qualified surplus channel. ## 50 MHz Cortex-M3 with 128 KB flash — memory headroom for a real RTOS The ARM Cortex-M3 core runs at 50 MHz — enough throughput for a control loop with a moderate protocol stack. The 128 KB on-chip flash and 32 KB SRAM leave room for a FreeRTOS or ThreadX kernel plus the application heap, though a heavy TCP/IP stack with multiple sockets will push the SRAM budget. Program memory is flash, so firmware updates in the field are feasible — budget the sector erase time into the update window. The 56 general-purpose I/O lines cover a mixed sensor-and-actuator interface without an external GPIO expander. ## 108-ball BGA — board integration and rework realities The 108-LFBGA package with a 10x10 mm body demands a controlled-impedance PCB stack-up and X-ray inspection after reflow. The 0.50 mm ball pitch is manageable with a 4-layer board; a 2-layer design will struggle to fan out the inner rows without blind vias. Surface-mount assembly is standard, but the BGA footprint means rework requires a hot-air station with a preheater — a soldering iron alone will not remove the part. ## Peripheral set and supply rail Connectivity includes I²C, SPI, SSI, UART/USART, IrDA, and Microwire — enough serial interfaces for a sensor hub or a bridge to a fieldbus gateway. The 4-channel 10-bit ADC handles analog inputs like potentiometers or current-sense resistors without an external converter. The internal oscillator eliminates an external crystal for non-critical timing, though a precision clock source is still needed for USB or CAN if those peripherals are used.","metaTitle":"LM3S1635-IBZ50-A2 ARM Cortex-M3 MCU, 50MHz, 128KB Flash","metaDescription":"Texas Instruments LM3S1635-IBZ50-A2 Stellaris ARM Cortex-M3 MCU, 50MHz, 128KB Flash, 32KB RAM, 56 I/O, -40 to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"50MHz","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tray","RAM Size":"32K x 8","Core Size":"32-Bit Single-Core","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, Microwire, SPI, SSI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"56","Core Processor":"ARM® Cortex®-M3","Package / Case":"108-LFBGA","Product Status":"Not For New Designs","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1635","Program Memory Size":"128KB (128K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"108-BGA (10x10)","Voltage - Supply (Vcc/Vdd)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$18.5774","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/LM3S1635-IBZ50-A2/alternatives.json"},"ai":{"faq":[{"question":"What is the closest alternative to LM3S1635-IBZ50-A2?","answer":"The LM3S1635 is part of the Stellaris ARM Cortex-M3S 1000 series. A pin-compatible or functionally equivalent replacement would be another member of the same series with matching package and memory — confirm the exact order code against the BOM position before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1635-IBZ50-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/LM3S1635-IBZ50-A2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:43:23.599Z","lastPublished":"2026-07-21T02:43:23.599Z","indexable":true}}