{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX491CPD+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX491CPD","canonicalUrl":"https://icboms.com/analog-devices/MAX491CPD","factsUrl":"https://icboms.com/api/mcp/products/MAX491CPD%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX491CPD+, RS-422/RS-485 transceiver, full duplex, 1 driver / 1 receiver, 2.5 Mbps data rate, 4.75V–5.25V supply, 0°C–70°C, 14-pin DIP (0.300\") through-hole.","salesMarkdown":"## RS-422/RS-485 full-duplex transceiver in a 14-pin DIP The Maxim Integrated MAX491CPD+ is a single-channel RS-422/RS-485 transceiver that handles full-duplex communication over a single twisted pair or two pairs. It integrates one driver and one receiver in a 14-pin DIP through-hole package, making it a direct fit for socketed or breadboarded designs, legacy bus interfaces, and point-to-point or multi-drop serial links where the bus runs at up to 2.5 Mbps. ## Full duplex — one pair for transmit, one for receive Full-duplex operation means the driver and receiver are active simultaneously, so the MAX491CPD+ needs two twisted pairs: one for transmit and one for receive. This contrasts with half-duplex RS-485 transceivers that share a single pair and require direction control via a DE/RE pin. ## Package and mounting The 14-pin DIP (0.300\" body width) is a through-hole package that fits standard pitch sockets or can be soldered directly into plated through-holes. The supplier device package is 14-PDIP. ## Lifecycle and sourcing It is ROHS3 compliant.","metaTitle":"MAX491CPD+ RS-422/RS-485 Transceiver, Full Duplex, 2.5 Mbps","metaDescription":"MAX491CPD+ RS-422/RS-485 full-duplex transceiver in 14-pin DIP. 2.5 Mbps data rate, 5V supply, 0-70°C. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"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":"0°C ~ 70°C","Supplier Device Package":"14-PDIP","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.99","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.99000","currency":"USD"},{"qty":10,"price":"$5.37900","currency":"USD"},{"qty":25,"price":"$5.08480","currency":"USD"},{"qty":100,"price":"$4.40700","currency":"USD"},{"qty":250,"price":"$4.18100","currency":"USD"},{"qty":500,"price":"$3.75160","currency":"USD"},{"qty":1000,"price":"$3.39000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/602428fed3abfc9496453e492ef2d17c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between MAX491 and MAX491CPD+?","answer":"The MAX491CPD+ is the lead-free / ROHS3-compliant version of the original MAX491. The electrical specifications — full-duplex RS-422/RS-485 transceiver, 2.5 Mbps data rate, 5 V supply, 0°C to 70°C range, 14-pin DIP package — are identical between the two. The MAX491CPD+ can be used as a direct replacement for the MAX491 in existing designs."},{"question":"Is MAX491CPD+ compatible with 3.3V logic?","answer":"No. The MAX491CPD+ requires a 4.75 V to 5.25 V supply and its logic inputs are referenced to that 5 V rail. It is not rated for 3.3 V logic levels. For 3.3 V RS-485 transceivers, look at parts like the MAX3485 family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX491CPD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX491CPD 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}}