{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1390U-3+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1390U-3","canonicalUrl":"https://icboms.com/analog-devices/DS1390U-3","factsUrl":"https://icboms.com/api/mcp/products/DS1390U-3%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1390U-3+, Clock/Calendar RTC, SPI, 10-uMAX, 2.7V–3.3V supply, -40°C to 85°C, trickle-charger, alarm, leap year, square wave output.","salesMarkdown":"## SPI RTC with backup battery management The Maxim Integrated DS1390U-3+ is a serial real-time clock (RTC) that keeps time as YY-MM-DD-dd and HH:MM:SS:hh in 12/24-hour format. Communication is over SPI. An integrated trickle-charger maintains a backup battery or supercap on the Vbat rail, so the clock holds through a main-supply dropout. The alarm output and square-wave generator can drive a host interrupt or toggle a logic line without polling. Supply range is 2.7 V to 3.3 V for the main rail; the battery backup input accepts 1.3 V to 3.7 V. Timekeeping current peaks at 125 µA over the full supply range, which keeps the load on the backup source low. The part is rated for -40°C to 85°C — industrial equipment, outdoor telecom, and factory-floor controllers are the natural fit. ## Package and mounting Housed in a 10-lead TFSOP/MSOP (3.00 mm body width). The supplier device package is 10-uMAX/uSOP. ## Lifecycle and compliance The DS1390U-3+ carries an Active product status and is ROHS3 compliant. No end-of-life notification or last-time-buy window is in effect. For a production BOM that needs a qualified SPI RTC with battery-charging support, this part is a current, manufacturable choice without near-term obsolescence risk.","metaTitle":"DS1390U-3+ Clock/Calendar RTC, SPI, Trickle-Charger, 10-uMAX","metaDescription":"DS1390U-3+ SPI RTC with trickle-charger, alarm, leap year, square wave output. Supply 2.7V–3.3V, industrial temp -40°C to 85°C. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Memory (DRAM / SRAM / Flash / EEPROM)"],"specifications":{"Type":"Clock/Calendar","Package":"Tube","Features":"Alarm, Leap Year, Square Wave Output, Trickle-Charger","Interface":"SPI","Date Format":"YY-MM-DD-dd","Time Format":"HH:MM:SS:hh (12/24 hr)","Mounting Type":"Surface Mount","Package / Case":"10-TFSOP, 10-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 3.3V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"10-uMAX/uSOP","Voltage - Supply, Battery":"1.3V ~ 3.7V","Current - Timekeeping (Max)":"125µA @ 2.7V ~ 3.3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.46","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.46000","currency":"USD"},{"qty":10,"price":"$4.90400","currency":"USD"},{"qty":25,"price":"$4.63600","currency":"USD"},{"qty":100,"price":"$4.01780","currency":"USD"},{"qty":250,"price":"$3.81176","currency":"USD"},{"qty":500,"price":"$3.42026","currency":"USD"},{"qty":1000,"price":"$2.88456","currency":"USD"},{"qty":2500,"price":"$2.74033","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/DS1390-DS1394.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does DS1390U-3+ have a trickle charger?","answer":"Yes, the DS1390U-3+ includes a trickle-charger for maintaining a backup battery or supercapacitor."},{"question":"Is DS1390U-3+ RoHS compliant?","answer":"Yes, it is ROHS3 compliant."},{"question":"Does DS1390U-3+ support 12/24 hour format?","answer":"Yes, the time format supports both 12-hour and 24-hour modes (HH:MM:SS:hh)."},{"question":"Where can I buy DS1390U-3+?","answer":"This part is sourced through independent distribution. Submit an RFQ for current availability and pricing; stock and lead time are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1390U-3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1390U-3 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}}