{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCA9536DGKR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TCA9536DGKR","canonicalUrl":"https://icboms.com/texas-instruments/TCA9536DGKR","factsUrl":"https://icboms.com/api/mcp/products/TCA9536DGKR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TCA9536DGKR I2C/SMBus GPIO expander, 4 I/O, 1 MHz clock, 1.65-5.5 V supply, open-drain output, 8-VSSOP package.","salesMarkdown":"## GPIO expansion for mixed-voltage I2C buses The TCA9536DGKR is a 4-bit I²C and SMBus GPIO expander from Texas Instruments, providing general-purpose remote I/O expansion for microcontrollers through a two-wire serial interface. It operates from a 1.65 V to 5.5 V supply, allowing direct connection to both low-voltage core logic and legacy 5 V peripherals without a level translator. With a 1 MHz clock rate and an open-drain interrupt output, the part signals the host on input changes without polling, reducing bus traffic in latency-sensitive applications. ## I/O count, drive, and temperature range Four configurable I/O pins each sink 25 mA or source 10 mA, sufficient to drive LEDs or small relays directly through the open-drain outputs. The POR (power-on reset) feature ensures the outputs default to a known high-impedance state at power-up, preventing unintended actuator activation during supply ramp. Rated for -40°C to +125°C operation, the device suits industrial enclosures, engine-bay electronics, and outdoor telecom gear where ambient temperatures exceed the commercial 85°C ceiling. ## Package and footprint options Available in an 8-pin VSSOP (DGK) package — also listed as 8-TSSOP or 8-MSOP with a 3.00 mm body width — the footprint is shared across multiple TI GPIO expanders, simplifying PCB layout reuse. Supplied in Tape & Reel or Cut Tape for both prototyping and production volumes. ## Lifecycle and sourcing posture The part is sourced through authorized and independent distribution channels; current pricing and lead time are confirmed at RFQ against the BOM quantity.","metaTitle":"TCA9536DGKR I2C GPIO Expander, 4 I/O, 1 MHz, 8-VSSOP","metaDescription":"Texas Instruments TCA9536DGKR I2C/SMBus GPIO expander, 4 I/O, 1 MHz, 1.65-5.5 V, -40 to 125°C, active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"POR","Interface":"I²C, SMBus","Output Type":"Open Drain","Mounting Type":"Surface Mount","Number of I/O":"4","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","Clock Frequency":"1 MHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"1.65V ~ 5.5V","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"8-VSSOP","Current - Output Source/Sink":"10mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.5","priceTiers":[{"qty":1,"price":"$1.50000","currency":"USD"},{"qty":10,"price":"$1.34100","currency":"USD"},{"qty":25,"price":"$1.27280","currency":"USD"},{"qty":100,"price":"$1.04540","currency":"USD"},{"qty":250,"price":"$0.97716","currency":"USD"},{"qty":500,"price":"$0.86356","currency":"USD"},{"qty":1000,"price":"$0.68175","currency":"USD"},{"qty":2500,"price":"$0.63630","currency":"USD"},{"qty":5000,"price":"$0.60448","currency":"USD"},{"qty":12500,"price":"$0.58176","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/805a8bb390553eff4425014310459551.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TCA9536DGKR/alternatives.json"},"ai":{"faq":[{"question":"Does TCA9536DGKR support interrupt output?","answer":"Yes, the open-drain INT output asserts low when an input pin changes state, allowing the host to respond without continuous polling."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TCA9536DGKR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TCA9536DGKR 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}}