{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9535DW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCA9535DW","canonicalUrl":"https://icboms.com/texas-instruments/PCA9535DW","factsUrl":"https://icboms.com/api/mcp/products/PCA9535DW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCA9535DW, 16-bit I²C/SMBus I/O expander, 400 kHz clock, 2.3V–5.5V supply, push-pull outputs, interrupt output, 24-SOIC package, -40°C to 85°C.","salesMarkdown":"## 16-bit I²C GPIO expander for board-level I/O stretch The Texas Instruments PCA9535DW is a 16-bit I²C and SMBus I/O expander in a 24-SOIC package, designed to add general-purpose digital I/O to a microcontroller or SoC. It operates from a 2.3 V to 5.5 V supply and communicates over a 400 kHz I²C bus. Each of the 16 I/O channels can be configured as input or output, with push-pull outputs capable of sourcing 10 mA and sinking 25 mA. A dedicated interrupt output (INT) notifies the host controller on input change. The POR (power-on reset) feature ensures all I/Os default to inputs at power-up. ## Temperature grade and environment Rated for -40°C to 85°C, the PCA9535DW suits industrial environments — motor drives, outdoor telecom cabinets, factory automation I/O blocks, and HVAC controllers. ## Sourcing and lifecycle For dual-sourcing or supply resilience, the TCA9536ADTMR is a functional alternative — it offers 4 I/O (not 16), operates from 1.65 V, uses open-drain outputs, and extends temperature to 125°C, but it is not a pin-compatible drop-in. The PCA9535DW is the full 16-bit version in the 24-SOIC footprint.","metaTitle":"TI PCA9535DW I²C I/O Expander, 16-Bit, 400 kHz, 24-SOIC","metaDescription":"TI PCA9535DW 16-bit I²C/SMBus I/O expander, 2.3V–5.5V supply, 400 kHz, 24-SOIC. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tube","Features":"POR","Interface":"I²C, SMBus","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"16","Package / Case":"24-SOIC (0.295\\\", 7.50mm Width)","Clock Frequency":"400 kHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"2.3V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"24-SOIC","Current - Output Source/Sink":"10mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.82","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.82000","currency":"USD"},{"qty":10,"price":"$2.53100","currency":"USD"},{"qty":25,"price":"$2.38760","currency":"USD"},{"qty":100,"price":"$2.03430","currency":"USD"},{"qty":250,"price":"$1.91012","currency":"USD"},{"qty":500,"price":"$1.67136","currency":"USD"},{"qty":1000,"price":"$1.38484","currency":"USD"},{"qty":2500,"price":"$1.35150","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/ce674dd7eded40202a27bcdad155d589.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does PCA9535DW support interrupt output?","answer":"Yes, the PCA9535DW has a dedicated interrupt output (INT) that asserts when any input changes state, allowing the host to avoid polling."},{"question":"What are reliable alternatives or cross references for PCA9535DW?","answer":"The TCA9536ADTMR is a functional alternative with 4 I/O, 1.65 V supply, open-drain outputs, and 125°C rating — but it is not pin-compatible and offers fewer I/O. For a full 16-bit drop-in, the PCA9535DW is the standard part."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCA9535DW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCA9535DW 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}}