{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TCA9535DBT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"TCA9535DBT","canonicalUrl":"https://icboms.com/texas-instruments/TCA9535DBT","factsUrl":"https://icboms.com/api/mcp/products/TCA9535DBT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments TCA9535DBT I²C/SMBus I/O expander, 16-bit, 24-SSOP package, 1.65-5.5V supply, 400 kHz clock, push-pull outputs, interrupt output, POR feature, -40 to 85°C.","salesMarkdown":"## 16 I/O lines over a two-wire bus The TCA9535DBT is a 16-bit I²C/SMBus I/O expander from Texas Instruments, giving a microcontroller 16 extra GPIO pins using just the SDA and SCL lines — no extra address pins needed beyond the three hardware-selectable ones on the bus. The I²C clock stretches to 400 kHz, fast enough for polling a bank of switches, LEDs, or relay drivers in a control loop under 100 µs. ## Interrupt-driven I/O and output drive An interrupt output (INT) goes low when any input pin changes state — the host MCU does not need to poll the expander continuously, which saves bus bandwidth and firmware cycles in event-driven systems. Each I/O can source 10 mA or sink 25 mA, enough to drive a standard LED directly or switch a small-signal relay through a transistor. The POR (power-on reset) feature ensures all I/Os come up as inputs after a supply brown-out, avoiding unintended output glitches during power sequencing. ## Active and RoHS3 compliant RoHS3 compliant, with no restricted substances above the threshold — no separate exemption paperwork needed for EU-market shipments.","metaTitle":"TCA9535DBT I²C I/O Expander, 16-bit, 24-SSOP, Active","metaDescription":"TCA9535DBT 16-bit I²C I/O expander in 24-SSOP. 1.65-5.5V supply, 400 kHz, interrupt output. Active, RoHS3. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"POR","Interface":"I²C, SMBus","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"16","Package / Case":"24-SSOP (0.209\\\", 5.30mm Width)","Clock Frequency":"400 kHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"1.65V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"24-SSOP","Current - Output Source/Sink":"10mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.0","priceTiers":[{"qty":1,"price":"$2.00000","currency":"USD"},{"qty":10,"price":"$1.80100","currency":"USD"},{"qty":25,"price":"$1.69880","currency":"USD"},{"qty":100,"price":"$1.44720","currency":"USD"},{"qty":250,"price":"$1.35892","currency":"USD"},{"qty":500,"price":"$1.18906","currency":"USD"},{"qty":1250,"price":"$0.98522","currency":"USD"},{"qty":2500,"price":"$0.96150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/95337fec675a1c5e64e7cf62913b122b.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TCA9535DBT/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/TCA9535DBT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/TCA9535DBT 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}}