{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX491EEPD+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX491EEPD","canonicalUrl":"https://icboms.com/analog-devices/MAX491EEPD","factsUrl":"https://icboms.com/api/mcp/products/MAX491EEPD%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX491EEPD+, RS-422/RS-485 transceiver, full duplex, 1/1 driver/receiver, 2.5 Mbps data rate, 4.75V–5.25V supply, 14-PDIP, -40°C to 85°C.","salesMarkdown":"## Full duplex vs half duplex — the bus topology decision The full-duplex capability with separate driver and receiver pairs supports simultaneous transmit and receive on a four-wire RS-422 bus or a four-wire RS-485 network. ## Package and mounting — MRO and panel fit The 14-DIP (0.300\", 7.62 mm) through-hole package is socket-friendly and easy to hand-replace in the field — a real advantage for MRO spares on existing PLC I/O cards or serial interface boards. No fine-pitch soldering, no reflow profile to worry about. The PDIP footprint also gives good mechanical retention in high-vibration industrial environments when socketed with a dual-wipe contact.","metaTitle":"MAX491EEPD+ RS-422/RS-485 Transceiver, Full Duplex, 2.5 Mbps","metaDescription":"MAX491EEPD+ RS-422/RS-485 full-duplex transceiver, 2.5 Mbps data rate, 14-PDIP, -40°C to 85°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Transceiver","Duplex":"Full","Package":"Tube","Protocol":"RS422, RS485","Data Rate":"2.5Mbps","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Receiver Hysteresis":"70 mV","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"14-PDIP","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$9.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$9.16000","currency":"USD"},{"qty":10,"price":"$8.27300","currency":"USD"},{"qty":25,"price":"$7.88880","currency":"USD"},{"qty":100,"price":"$6.84960","currency":"USD"},{"qty":250,"price":"$6.54176","currency":"USD"},{"qty":500,"price":"$5.96456","currency":"USD"},{"qty":1000,"price":"$5.19494","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/44b4a4b2553f52a56d8665981e25a7bf.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can MAX491EEPD+ be used for full-duplex RS-422?","answer":"Yes. The MAX491EEPD+ is a full-duplex transceiver with one driver and one receiver, supporting both RS-422 and RS-485 protocols. For RS-422, connect the driver outputs to the transmit pair and the receiver inputs to the receive pair — no direction control needed."},{"question":"What is the difference between MAX491EEPD+ and MAX485?","answer":"The MAX485 is a half-duplex RS-485 transceiver (one driver/receiver pair sharing a single bus), while the MAX491EEPD+ is full-duplex (separate driver and receiver pairs). The MAX491EEPD+ also includes 70 mV receiver hysteresis for improved noise margin on long cables."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX491EEPD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX491EEPD 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}}