{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MSP430F2121TDW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"MSP430F2121TDW","canonicalUrl":"https://icboms.com/texas-instruments/MSP430F2121TDW","factsUrl":"https://icboms.com/api/mcp/products/MSP430F2121TDW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments MSP430F2xx series, MSP430F2121TDW, 16-bit MCU, 16MHz, 4KB Flash, 256 x 8 RAM, 16 I/O, 1.8V-3.6V, -40°C~105°C, 20-SOIC.","salesMarkdown":"The 16 general-purpose I/O lines, internal oscillator, and slope A/D converter cover the basic analog and digital interface needs without external components — typical applications include thermostat controllers, simple data loggers, and remote I/O modules in industrial or building-automation gear. The 16 MHz clock is the CPU's top speed, and with the MSP430's single-cycle multiply and hardware multiplier, it handles 16-bit sensor reads and PID loops comfortably. The 4 KB Flash is the hard limit for compiled code — expect to fit a modest main loop, a few interrupt service routines, and a bootloader if you keep the firmware lean. The 256-byte RAM is the working memory; it constrains stack depth and buffer sizes, so any substantial data logging or communication buffering will need external serial SRAM or a careful memory map. The slope A/D converter is a low-speed successive-approximation type — adequate for temperature or voltage monitoring at sample rates below a few hundred hertz, but not for audio or vibration capture. ## Package and footprint — 20-SOIC wide-body The 20-SOIC (0.295\", 7.50 mm width) package uses the standard SOIC-20W land pattern, which is easy to hand-solder and inspect. The wide body gives better thermal dissipation than the narrow SOIC-20 variant, though at 16 MHz and typical microamp currents, thermal is rarely a concern.","metaTitle":"Texas Instruments MSP430F2121TDW 16-bit MCU, 4KB Flash","metaDescription":"TI MSP430F2121TDW 16-bit MCU with 4KB Flash, 256B RAM, 16MHz, 16 I/O, slope ADC, industrial temp -40°C to 105°C. Active lifecycle, RoHS3.","metaKeywords":null},"attributes":{"series":"MSP430F2xx","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"16MHz","Series":"MSP430F2xx","Package":"Tube","RAM Size":"256 x 8","Core Size":"16-Bit","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"-","Mounting Type":"Surface Mount","Number of I/O":"16","Core Processor":"MSP430 CPU16","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","Product Status":"Active","Data Converters":"Slope A/D","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"MSP430F2121","Program Memory Size":"4KB (4K x 8 + 256B)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~105°C(TA)","Supplier Device Package":"20-SOIC","Voltage - Supply (Vcc/Vdd)":"1.8V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.3400","priceTiers":[{"qty":1,"price":"$3.34000","currency":"USD"},{"qty":10,"price":"$3.00200","currency":"USD"},{"qty":25,"price":"$2.83760","currency":"USD"},{"qty":100,"price":"$2.45930","currency":"USD"},{"qty":250,"price":"$2.33320","currency":"USD"},{"qty":500,"price":"$2.09360","currency":"USD"},{"qty":1000,"price":"$1.76568","currency":"USD"},{"qty":2500,"price":"$1.67740","currency":"USD"},{"qty":5000,"price":"$1.61434","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/915f3387ecbce04a8fd7c7e9a4da9617.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MSP430F2121TDW/alternatives.json"},"ai":{"faq":[{"question":"Is MSP430F2121TDW RoHS compliant?","answer":"Yes, it is ROHS3 compliant per the Texas Instruments listing."},{"question":"What is the difference between MSP430F2121TDW and MSP430F2131?","answer":"The MSP430F2131 is a higher-density sibling in the same MSP430F2xx family, offering 8 KB of Flash program memory versus the 4 KB on the MSP430F2121TDW. Both share the same 16-bit CPU core, 16 MHz speed, 20-SOIC package option, and peripheral set. The extra Flash on the F2131 supports larger firmware images or additional application code. If your code fits in 4 KB, the F2121TDW is the cost-optimized choice."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/MSP430F2121TDW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/MSP430F2121TDW 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}}