{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX253CSA+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX253CSA","canonicalUrl":"https://icboms.com/analog-devices/MAX253CSA","factsUrl":"https://icboms.com/api/mcp/products/MAX253CSA%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim MAX253CSA+, Transformer Driver IC, 3.3V/5V supply, 450 µA supply current, 8-SOIC (0.154\", 3.90mm Width), Surface Mount, 0°C to 70°C, Tube.","salesMarkdown":"## Transformer driver for isolated RS485 power The MAX253CSA+ from Maxim Integrated is a dedicated transformer driver IC designed to generate an isolated power supply for RS485 transceivers and similar isolated interfaces. It integrates an oscillator and power stage that drives a centre-tapped transformer from a 3.3 V or 5 V rail, producing a clean, isolated secondary voltage with minimal external components. The part draws only 450 µA supply current, making it suitable for loop-powered or low-power isolated channels where every milliamp counts. It comes in an 8-SOIC surface-mount package and is rated for the commercial temperature range of 0°C to 70°C, so it fits indoor equipment, office peripherals, and telecom line cards — not under-hood or outdoor enclosures without climate control. ## Package and rework — 8-SOIC is bench-friendly The 8-SOIC package (0.154\" body width, 3.90 mm) is a standard footprint that hot-air rework handles cleanly. The leads are gull-wing, so visual inspection of solder joints is straightforward after reflow. Tube shipment means the parts arrive aligned and undamaged; no tape-and-reel feeding issues for small-batch assembly. ## Supply voltage — runs on 3.3 V or 5 V without a regulator The MAX253CSA+ accepts either a 3.3 V or 5 V supply rail directly, with no external LDO needed. This simplifies BOM planning for mixed-voltage boards: if the isolated side runs on 3.3 V logic, the same rail powers the driver. The 450 µA quiescent current is the total draw from that rail when the transformer is unloaded; actual input current rises with the secondary load, but the no-load floor stays low enough for always-on isolated channels. ## Lifecycle and sourcing — active, no LTB risk The MAX253CSA+ carries an active lifecycle status per the manufacturer, with ROHS3 compliance. There is no last-time-buy notice or NRND flag.","metaTitle":"MAX253CSA+ Transformer Driver, 3.3V/5V, 8-SOIC","metaDescription":"MAX253CSA+ transformer driver IC for isolated RS485 power. 450 µA supply, 3.3V/5V operation, 8-SOIC. Active production, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Tube","Applications":"Transformer Driver","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Current - Supply":"450µA","Voltage - Supply":"3.3V, 5V","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"8-SOIC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.18","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.18000","currency":"USD"},{"qty":10,"price":"$3.75600","currency":"USD"},{"qty":25,"price":"$3.55120","currency":"USD"},{"qty":100,"price":"$3.07780","currency":"USD"},{"qty":250,"price":"$2.91996","currency":"USD"},{"qty":500,"price":"$2.62008","currency":"USD"},{"qty":1000,"price":"$2.20970","currency":"USD"},{"qty":2500,"price":"$2.09922","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX253.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is a direct replacement for MAX253CSA+?","answer":"The MAX253CSA+ is the commercial-temperature variant (0°C to 70°C) in the MAX253 family. The MAX253ESA+ is the extended-temperature (-40°C to +85°C) version in the same 8-SOIC footprint, which is a drop-in replacement if your design needs wider temperature range. No other pin-compatible second source is listed in the official documentation."},{"question":"Is MAX253CSA+ compatible with 3.3V or only 5V?","answer":"It is compatible with both 3.3 V and 5 V supplies. The same part works on either rail without jumper or component change — just connect the supply pin to your system voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX253CSA","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX253CSA 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}}