{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"PCA9534ADWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"PCA9534ADWR","canonicalUrl":"https://icboms.com/texas-instruments/PCA9534ADWR","factsUrl":"https://icboms.com/api/mcp/products/PCA9534ADWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments PCA9534ADWR I2C/SMBus 8-bit I/O expander, 16-SOIC (7.50mm width), 2.3-5.5V supply, -40 to 85°C, push-pull outputs with interrupt, POR feature.","salesMarkdown":"## 8-bit I/O expander on the I2C bus The PCA9534ADWR is an 8-bit I/O expander from Texas Instruments, communicating over I2C and SMBus at up to 400 kHz. It adds eight general-purpose I/O pins to a host controller with minimal bus overhead — each port can be configured as input or output, and the interrupt output (INT) signals the host when an input state changes, eliminating continuous polling. ## Output drive and package fit Each I/O pin can source 10 mA or sink 25 mA — enough to drive an LED directly or switch a small-signal relay through a transistor. The push-pull output stage eliminates the need for external pull-up resistors on output pins, though inputs remain high-impedance and require a pull-up for open-drain signals. Housed in a 16-SOIC package with a 7.50 mm body width (the wide-body variant), the PCA9534ADWR fits standard SOIC-16 footprints. The POR (power-on reset) feature ensures the I/O pins default to inputs on power-up, preventing unintended output states during supply ramp.","metaTitle":"PCA9534ADWR I2C I/O Expander, 8-bit, 16-SOIC, Active","metaDescription":"Texas Instruments PCA9534ADWR I2C/SMBus I/O expander, 8 I/O with interrupt, 2.3-5.5V supply, -40 to 85°C, 16-SOIC. Active, ROHS3. Request 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":"8","Package / Case":"16-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":"16-SOIC","Current - Output Source/Sink":"10mA, 25mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.09","priceTiers":[{"qty":1,"price":"$2.09000","currency":"USD"},{"qty":10,"price":"$1.87600","currency":"USD"},{"qty":25,"price":"$1.77040","currency":"USD"},{"qty":100,"price":"$1.50820","currency":"USD"},{"qty":250,"price":"$1.41616","currency":"USD"},{"qty":500,"price":"$1.23914","currency":"USD"},{"qty":1000,"price":"$1.02672","currency":"USD"},{"qty":2000,"price":"$1.00200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/0eb2a599f8938193efde1bd70240c816.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/PCA9534ADWR/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to the PCA9534ADWR?","answer":"Within the same family, the PCA9534APW (TSSOP-16) and PCA9534AD (SOIC-16, narrower 3.90 mm body) share the same I2C register map and 8-bit I/O count but differ in package footprint. The PCA9534ADWR's wide-body SOIC-16 is the only variant with the 7.50 mm width — confirm your PCB land pattern before substituting."},{"question":"How can I get current pricing and availability for the PCA9534ADWR?","answer":"Pricing and stock levels are confirmed at quote time. Submit an RFQ with your target quantity and preferred date-code window — availability is quoted against current distribution inventory and factory lead times."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/PCA9534ADWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/PCA9534ADWR 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}}