{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX7301AAX+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX7301AAX","canonicalUrl":"https://icboms.com/analog-devices/MAX7301AAX","factsUrl":"https://icboms.com/api/mcp/products/MAX7301AAX%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX7301AAX+, SPI GPIO expander, 28 I/O, push-pull outputs, 26 MHz clock, 2.5-5.5V supply, -40 to 125°C, 36-SSOP package.","salesMarkdown":"## 28-channel SPI GPIO expander for board-level I/O scaling The Maxim Integrated MAX7301AAX+ is a 28-bit GPIO expander controlled over an SPI interface, clocked up to 26 MHz. It provides 28 push-pull I/O lines in a 36-SSOP package, each capable of sourcing 4.5 mA or sinking 10 mA. The wide supply range of 2.5 V to 5.5 V lets it bridge 3.3 V and 5 V logic domains without a level translator. An interrupt output signals pin-change events, reducing host polling overhead. The part is rated for industrial environments from -40°C to 125°C, making it suitable for motor drives, outdoor telecom gear, and factory automation panels where the PCB sees extended temperature swings. ## 26 MHz SPI — bus throughput and polling latency The 26 MHz SPI clock is the headline rating for this part. At that speed, a full 28-bit read or write transaction completes in just over 1 µs, which means the host MCU can poll all I/O states in a single SPI frame without stalling a real-time control loop. If your design runs a 10 kHz sensor readout or a fast encoder latch, this expander keeps the bus transaction short enough that you don't need a dedicated parallel port. ## 28 I/O in a 36-SSOP — footprint and routing The 36-SSOP (7.50 mm body width) gives you 28 I/O in a compact surface-mount footprint. That's enough to replace a handful of 8-bit shift registers or a second MCU port, consolidating BOM lines. The push-pull outputs eliminate external pull-up resistors on outputs, though inputs still need a pull-up if the line floats. The interrupt output (active-low, open-drain) can be wire-ORed with other interrupt sources on the same host line. ## Active lifecycle and sourcing posture The MAX7301AAX+ carries an Active lifecycle status and is ROHS3 compliant.","metaTitle":"MAX7301AAX+ SPI GPIO Expander, 28 I/O, 26 MHz, 36-SSOP","metaDescription":"MAX7301AAX+ SPI GPIO expander with 28 push-pull I/O, 26 MHz clock, 2.5-5.5V supply, -40 to 125°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tube","Interface":"SPI","Output Type":"Push-Pull","Mounting Type":"Surface Mount","Number of I/O":"28","Package / Case":"36-BSOP (0.295\\\", 7.50mm Width)","Clock Frequency":"26 MHz","lifecycle_stage":"eol_hot","Interrupt Output":"Yes","Voltage - Supply":"2.5V ~ 5.5V","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"36-SSOP","Current - Output Source/Sink":"4.5mA, 10mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.77","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.77000","currency":"USD"},{"qty":10,"price":"$9.72800","currency":"USD"},{"qty":25,"price":"$9.27600","currency":"USD"},{"qty":100,"price":"$8.05410","currency":"USD"},{"qty":250,"price":"$7.69216","currency":"USD"},{"qty":500,"price":"$7.01344","currency":"USD"},{"qty":1000,"price":"$6.10848","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX7301.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is MAX7301AAX+'s listed interface?","answer":"The interface is SPI (Serial Peripheral Interface), clocked up to 26 MHz. The part operates as an SPI slave and supports mode 0,0 and 1,1 (CPOL=0, CPHA=0 or CPOL=1, CPHA=1)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX7301AAX","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX7301AAX 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}}