{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ATTINY25-20SSUR","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"ATTINY25-20SSUR","canonicalUrl":"https://icboms.com/microchip/ATTINY25-20SSUR","factsUrl":"https://icboms.com/api/mcp/products/ATTINY25-20SSUR","rawCanonicalId":null},"summary":{"shortDescription":"Microchip ATTINY25-20SSUR, AVR® ATtiny series, 8-bit MCU, 20 MHz, 2 KB Flash, 128 x 8 RAM, 128 x 8 EEPROM, 6 I/O, 4x10b ADC, USI, 8-SOIC, -40°C to 85°C.","salesMarkdown":"## 20 MHz AVR core in an 8-pin SOIC — what fits here The Microchip ATTINY25-20SSUR is an 8-bit AVR microcontroller from the ATtiny family, qualified for Functional Safety (FuSa) applications. It runs at 20 MHz from an internal oscillator, with 2 KB of Flash program memory, 128 bytes of SRAM, and 128 bytes of EEPROM — all in an 8-pin SOIC package. ## Memory budget and peripheral set With 128 bytes each of RAM and EEPROM, this part is sized for small state machines, calibration constants, and boot counters — not data logging or large buffers. The 2 KB Flash (organized as 1K x 16) holds the firmware image; if your compiled binary exceeds that, you need a larger ATtiny or the AVR32DD series. The USI (Universal Serial Interface) can be configured for SPI or I²C, giving one external communication link. Brown-out detection and a programmable watchdog timer are built in, so external reset supervisor ICs can often be omitted. The Functional Safety (FuSa) qualification adds a documentation trace for safety-critical firmware development, though the part itself is not AEC-Q100 listed.","metaTitle":"ATTINY25-20SSUR Microchip 8-bit AVR MCU, 20 MHz, 2 KB Flash","metaDescription":"Microchip ATTINY25-20SSUR 8-bit AVR MCU: 20 MHz core, 2 KB Flash, 128 B RAM/EEPROM, 6 I/O, 4x10b ADC, -40 to 85°C. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"AVR® ATtiny, Functional Safety (FuSa)","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Mfr":"Microchip Technology","Speed":"20MHz","Series":"AVR® ATtiny, Functional Safety (FuSa)","Package":"Tape & Reel (TR); Cut Tape (CT)","RAM Size":"128 x 8","Core Size":"8-Bit","EEPROM Size":"128 x 8","Peripherals":"Brown-out Detect/Reset, POR, PWM, WDT","Connectivity":"USI","Mounting Type":"Surface Mount","Number of I/O":"6","Core Processor":"AVR","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","Data Converters":"A/D 4x10b","Oscillator Type":"Internal","lifecycle_stage":"eol_hot","Base Product Number":"ATTINY25","Program Memory Size":"2KB (1K x 16)","Program Memory Type":"FLASH","Operating Temperature":"-40°C~85°C(TA)","Supplier Device Package":"8-SOIC","Voltage - Supply (Vcc/Vdd)":"2.7V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.1200","priceTiers":[{"qty":1,"price":"$1.12000","currency":"USD"},{"qty":25,"price":"$1.01200","currency":"USD"},{"qty":100,"price":"$0.94500","currency":"USD"},{"qty":4000,"price":"$0.94500","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/e886a731351a5f5ffba7407b7da95a58.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ATTINY25-20SSUR/alternatives.json"},"ai":{"faq":[{"question":"Is ATTINY25-20SSUR RoHS compliant?","answer":"Yes, the ATTINY25-20SSUR is ROHS3 compliant per the Microchip lifecycle record."},{"question":"Can ATTINY25-20SSUR be programmed with an Arduino as ISP?","answer":"Yes, the ATTINY25 uses the standard AVR SPI programming interface. An Arduino board running the Arduino as ISP sketch can program it, provided the connections match the 6-pin ISP header (MISO, MOSI, SCK, RESET, Vcc, GND). The 2 KB Flash capacity limits the firmware size, but the workflow is the same as for other ATtiny parts."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/ATTINY25-20SSUR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/ATTINY25-20SSUR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T14:34:45.345Z","lastPublished":"2026-07-20T14:34:45.345Z","indexable":true}}