{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MSP430AFE251IPW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"MSP430AFE251IPW","canonicalUrl":"https://icboms.com/texas-instruments/MSP430AFE251IPW","factsUrl":"https://icboms.com/api/mcp/products/MSP430AFE251IPW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments MSP430F2xx series, 16-bit MSP430 CPU16 microcontroller, 12 MHz, 16 KB FLASH, 512×8 RAM, 1×24-bit sigma-delta ADC, 11 I/O, 1.8–3.6 V, 24-TSSOP, -40°C to 85°C.","salesMarkdown":"## 24-bit sigma-delta ADC — the part's reason for being The MSP430AFE251IPW carries a single 24-bit sigma-delta A/D converter on-chip — that is the headline feature that separates this MSP430 variant from the general-purpose family members. The 24-bit resolution targets energy-metering front-ends where the dynamic range of a current-sense shunt or voltage divider spans several decades and the noise floor must sit below the least-significant bit of a 16-bit result. ## 16 KB FLASH, 512×8 RAM — memory budget for the metrology stack 16 KB of program FLASH and 512 bytes of RAM (organized as 512×8) are enough for a dedicated metrology loop: the 24-bit ADC interrupt service routine, a digital filter, a calibration coefficient table, and a UART or SPI driver to push the result to a host processor. The RAM is tight — any buffering beyond a few samples forces external serial RAM or a larger sibling in the MSP430AFE2xx family. Running at 12 MHz from the internal oscillator, the CPU16 core has enough throughput to oversample the ADC and apply a simple moving-average filter without dropping samples. The brown-out detect and watchdog timer on-chip keep the CPU from locking up during supply dips — relevant for a meter that must self-recover after a mains dropout. That means the die, the mask set, and the assembly line are current. For a BOM that needs multi-year supply continuity — typical in utility-meter production — this matters more than a parametric spec.","metaTitle":"TI MSP430AFE251IPW MCU, 16-bit, 12 MHz, 24-bit ADC, 24-TSSOP","metaDescription":"Texas Instruments MSP430AFE251IPW 16-bit MCU, 12 MHz, 16 KB FLASH, 512×8 RAM, 1×24-bit sigma-delta ADC, 24-TSSOP, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"12MHz","Series":"MSP430F2xx","Package":"Tube","RAM Size":"512 x 8","Core Size":"16-Bit","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, PWM, WDT","Connectivity":"SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"11","Core Processor":"MSP430 CPU16","Package / Case":"24-TSSOP (0.173\\\", 4.40mm Width)","Product Status":"Active","Data Converters":"A/D 1x24b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"MSP430AFE251","Program Memory Size":"16KB (16K x 8)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"24-TSSOP","Voltage - Supply (Vcc/Vdd)":"1.8V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.6750","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/c7412554fb8cd23d208fe08bda354203.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/MSP430AFE251IPW/alternatives.json"},"ai":{"faq":[{"question":"What is the key differentiator of this MSP430 variant?","answer":"The on-chip 24-bit sigma-delta ADC. This is the defining peripheral — the part is designed for energy-measurement applications where a high-resolution ADC is needed in a single-chip metrology front-end."},{"question":"What is the memory configuration of the MSP430AFE251IPW?","answer":"The RAM is 512 bytes organized as 8-bit words — sufficient for a dedicated metrology loop but tight for buffering."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/MSP430AFE251IPW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/MSP430AFE251IPW 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}}