{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCF8574ADGVR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCF8574ADGVR","canonicalUrl":"https://icboms.com/texas-instruments/PCF8574ADGVR","factsUrl":"https://icboms.com/api/mcp/products/PCF8574ADGVR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCF8574ADGVR, 8-bit I2C I/O expander, 100 kHz clock, 2.5V to 6V supply, push-pull outputs, interrupt output, -40°C to 85°C, 20-TVSOP package.","salesMarkdown":"## 8-bit I2C I/O expander in a 20-TVSOP package It provides eight push-pull I/O lines, each capable of sinking 25 mA or sourcing 1 mA, making it a practical choice for driving LEDs, reading switches, or expanding the GPIO count of a microcontroller without adding extra pins. The part includes a power-on reset (POR) feature that initializes the I/O to a known state at power-up, and an interrupt output (INT) that signals the host when an input changes, eliminating the need for constant polling. Housed in a 20-pin TVSOP package (4.4 mm wide, 0.173\" pitch), it is a surface-mount device suited for compact PCB layouts. ## Supply voltage range and temperature grade For designs that need the I/O expander to run from a 1.8 V rail or survive under-hood automotive temperatures (125°C), this part is not the fit — the TCA9536ADTMR (1.65 V minimum, -40°C to 125°C) is a functional alternative, though it offers only 4 I/O and open-drain outputs. It is ROHS3 compliant. There is no LTB risk or imminent obsolescence to plan around for new designs.","metaTitle":"Texas Instruments PCF8574ADGVR I2C I/O Expander, 8-bit","metaDescription":"PCF8574ADGVR 8-bit I2C I/O expander from TI. 2.5V-6V supply, 100 kHz clock, push-pull outputs, interrupt output, -40°C to 85°C. Active lifecycle.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Mfr":"Texas Instruments","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"POR","Interface":"I²C","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"8","Package / Case":"20-TFSOP (0.173\\\", 4.40mm Width)","Product Status":"Active","Clock Frequency":"100 kHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"2.5V ~ 6V","Base Product Number":"PCF8574","Operating Temperature":"-40°C~85°C","Supplier Device Package":"20-TVSOP","Current - Output Source/Sink":"1mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.9500","priceTiers":[{"qty":1,"price":"$1.95000","currency":"USD"},{"qty":10,"price":"$1.75300","currency":"USD"},{"qty":25,"price":"$1.65360","currency":"USD"},{"qty":100,"price":"$1.40890","currency":"USD"},{"qty":250,"price":"$1.32288","currency":"USD"},{"qty":500,"price":"$1.15752","currency":"USD"},{"qty":1000,"price":"$0.95909","currency":"USD"},{"qty":2000,"price":"$0.93600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/fb696dd34b280bb875ac664bb0ca53b4.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCF8574ADGVR/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy PCF8574ADGVR available via RFQ confirmation?","answer":"The PCF8574ADGVR is available to order through independent distribution."},{"question":"Does PCF8574ADGVR have an interrupt output?","answer":"Yes, the PCF8574ADGVR includes an interrupt output (INT) that asserts when an input changes state, allowing the host microcontroller to respond without polling the I²C bus."},{"question":"What is the difference between PCF8574ADGVR and PCF8574DGVR?","answer":"The distinction between the PCF8574A and PCF8574 variants lies in the I²C slave address. The PCF8574A (base part number PCF8574A) uses a different fixed address block (0x38–0x3F) than the standard PCF8574 (0x20–0x27), allowing both to coexist on the same I²C bus without address conflict. The 'DGVR' suffix indicates a different package or tape/reel option — verify the specific package code against your BOM."},{"question":"What is the difference between PCF8574 and PCF8574A?","answer":"The PCF8574 and PCF8574A are functionally identical (8-bit I/O expander, same pinout, same electrical specs) but differ in their I²C slave address range. The PCF8574 occupies addresses 0x20–0x27, while the PCF8574A occupies 0x38–0x3F. This allows up to 16 of these devices on a single I²C bus (8 of each variant)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCF8574ADGVR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCF8574ADGVR 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}}