{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MSP430FR5721IRHAR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"MSP430FR5721IRHAR","canonicalUrl":"https://icboms.com/texas-instruments/MSP430FR5721IRHAR","factsUrl":"https://icboms.com/api/mcp/products/MSP430FR5721IRHAR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments MSP430FR5721IRHAR, MSP430™ FRAM series, 16-bit MCU, CPUXV2 core at 8 MHz, 4 KB FRAM, 1K x 8 SRAM, 32 I/O, 14x10-bit ADC, I²C/SPI/UART, 2 V to 3.6 V supply, -40°C to 85°C, 40-VQFN.","salesMarkdown":"## FRAM-based 16-bit MCU for low-power control Its distinguishing feature is the 4 KB of FRAM program memory — non-volatile, fast to write, and rated for high endurance compared to Flash or EEPROM. The device also carries 1K x 8 of SRAM for data scratchpad. This combination targets applications where frequent data logging, low-power duty cycling, or field firmware updates are needed, such as sensor nodes, portable instruments, and industrial controllers. ## 4 KB FRAM — what it means for firmware and data storage With 4 KB of FRAM for program memory, the MSP430FR5721IRHAR sits at the entry-density end of the FRAM series. That is enough for small control loops, state machines, and communication protocol stacks for I²C, SPI, or UART links. The FRAM writes at bus speed without the erase-before-write penalty of Flash — useful for designs that update calibration constants or configuration tables on the fly. The 1K x 8 SRAM provides the working memory for stack and variables; if your application needs larger buffers, step up the FRAM density variant in the same pin-compatible family. If your design lives under the hood or in a downhole tool, you will need the extended-temperature variants in the family. For BOM planning, that means standard lead times through distribution and no urgency to stockpile or qualify a second source. If you are designing this into a new product, the supply outlook is stable. ## Peripherals and I/O — what is on the 40-VQFN The MCU brings out 32 I/O pins from the 40-VQFN package (6x6 mm, exposed pad). On-chip peripherals include a 14-channel 10-bit ADC, brown-out reset and power-on reset, PWM timers, and a watchdog timer.","metaTitle":"Texas Instruments MSP430FR5721IRHAR MCU, 16-bit, 8 MHz","metaDescription":"TI MSP430FR5721IRHAR 16-bit MCU with 4 KB FRAM, 1K x 8 SRAM, 8 MHz CPUXV2 core, 32 I/O, 14x10-bit ADC, I²C/SPI/UART, -40°C to 85°C, 40-VQFN.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Texas Instruments","Speed":"8MHz","Series":"MSP430™ FRAM","Package":"Tape & Reel (TR)","RAM Size":"1K x 8","Core Size":"16-Bit","EEPROM Size":"-","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"I²C, IrDA, LINbus, SCI, SPI, UART/USART","Mounting Type":"Surface Mount","Number of I/O":"32","Core Processor":"MSP430 CPUXV2","Package / Case":"40-VFQFN Exposed Pad","Product Status":"Active","Data Converters":"A/D 14x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"MSP430FR5721","Program Memory Size":"4KB (4K x 8)","Program Memory Type":"FRAM","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"40-VQFN (6x6)","Voltage - Supply (Vcc/Vdd)":"2V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.6854","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/6d22cd36ef84fcd0b0b17f590749a972.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the FRAM size of MSP430FR5721IRHAR?","answer":"The MSP430FR5721IRHAR has 4 KB of FRAM program memory, organized as 4K x 8. It also includes 1K x 8 of SRAM for data."},{"question":"What is the operating frequency of MSP430FR5721IRHAR?","answer":"The CPUXV2 core runs at 8 MHz."},{"question":"Does MSP430FR5721IRHAR have a built-in ADC?","answer":"Yes, it includes a 14-channel, 10-bit analog-to-digital converter."},{"question":"How does MSP430FR5721IRHAR compare to MSP430FR5739?","answer":"The MSP430FR5739 is a higher-density sibling in the same FRAM series, offering more program memory and SRAM. The MSP430FR5721IRHAR is the entry-density option with 4 KB FRAM and 1K x 8 SRAM, suited for smaller code footprints and simpler control tasks. Both share the same CPUXV2 core, 8 MHz speed, and 40-VQFN package, so they are pin-compatible for a drop-in upgrade path."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/MSP430FR5721IRHAR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/MSP430FR5721IRHAR 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}}