{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LM3S1166-IQC50-A2T","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"LM3S1166-IQC50-A2T","canonicalUrl":"https://icboms.com/texas-instruments/LM3S1166-IQC50-A2T","factsUrl":"https://icboms.com/api/mcp/products/LM3S1166-IQC50-A2T","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, LM3S1166-IQC50-A2T, 50 MHz ARM Cortex-M3 core, 64 KB Flash, 16 KB RAM, 43 I/O, 4×10-bit ADC, -40 to 85°C, 100-LQFP, Tape & Reel.","salesMarkdown":"## 50 MHz Cortex-M3 with 64 KB Flash — what the memory means for your firmware The LM3S1166-IQC50-A2T is a Stellaris ARM Cortex-M3 MCU from Texas Instruments, clocked at 50 MHz with a 32-bit single-core processor. That 50 MHz ceiling sets the instruction throughput — at one cycle per instruction for many Cortex-M3 operations, you get roughly 50 MIPS before memory wait states enter the picture. On-chip memory is split into 64 KB of Flash (64K × 8) and 16 KB of SRAM (16K × 8). The Flash holds the application code and constant data; the 16 KB RAM is the working buffer for stack, heap, and runtime variables. For a control loop logging sensor data at 100 Hz, that RAM budget accommodates roughly 4000 32-bit readings before needing external storage. 43 general-purpose I/O pins are available in the 100-LQFP package. That count is enough to drive a parallel LCD data bus (8 or 16 bits), read a row of pushbuttons, and still leave pins for serial interfaces. Serial connectivity includes I²C, SPI, SSI, UART/USART, and IrDA — the UARTs handle RS-232 or RS-485 transceivers for industrial comms, while the I²C and SPI buses connect to external ADCs, DACs, or EEPROMs without consuming extra GPIO. A 4-channel 10-bit analog-to-digital converter is built in, sampling at the MCU's internal clock rate. For applications that need to read a potentiometer, a thermistor, or a current-sense resistor, this ADC avoids an external converter — though the 10-bit resolution (1024 steps) limits precision to about 0.1% of the reference voltage. ## Supply and temperature — the operating envelope The core and I/O share a single supply rail: 2.25 V to 2.75 V. This qualifies the part for factory-floor enclosures, outdoor telecom cabinets, and automotive cabin applications (though it lacks AEC-Q100 certification). Texas Instruments lists the LM3S1166-IQC50-A2T as Obsolete. The part is no longer manufactured or supported by TI for new designs.","metaTitle":"TI LM3S1166-IQC50-A2T ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash","metaDescription":"Texas Instruments LM3S1166-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash, 16 KB RAM, 43 I/O, -40 to 85°C, 100-LQFP. 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":"LM3S1166-IQC50-A2T","Series":"Stellaris® ARM® Cortex®-M3S 1000","Package":"Tape & Reel (TR)","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":"43","Core Processor":"ARM® Cortex®-M3","Package / Case":"100-LQFP","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"LM3S1166","Program Memory Size":"64KB (64K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"100-LQFP (14x14)","Voltage - Supply (Vcc/Vdd)":"2.25V ~ 2.75V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/7902984c953e81631620e4ca4e1070a2.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy the LM3S1166-IQC50-A2T and get a price?","answer":"The LM3S1166-IQC50-A2T is sourced through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/LM3S1166-IQC50-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/LM3S1166-IQC50-A2T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T02:41:37.767Z","lastPublished":"2026-07-21T02:41:37.767Z","indexable":true}}