{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1305EN+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1305EN","canonicalUrl":"https://icboms.com/analog-devices/DS1305EN","factsUrl":"https://icboms.com/api/mcp/products/DS1305EN%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1305EN+ real-time clock/calendar, SPI interface, 96B NVSRAM, trickle-charger, alarm, leap year, 20-TSSOP, -40°C to 85°C, 2V to 5.5V supply.","salesMarkdown":"## RTC with SPI and integrated backup management The Maxim Integrated DS1305EN+ is a real-time clock/calendar with a full SPI interface, packing a 96B NVSRAM, alarm, leap-year compensation, and a trickle-charger into a 20-TSSOP package. It keeps time in HH:MM:SS (12/24 hr) and YY-MM-DD-dd formats, drawing 25.3µA to 81µA during timekeeping depending on supply voltage. The part is rated for -40°C to 85°C operation and accepts a main supply of 2V to 5.5V, with a separate battery input on the same voltage range for backup. ## Trickle-charger and battery backup — what it means for your BOM The trickle-charger supports a rechargeable backup battery or supercapacitor on the battery input. The battery supply range is 2V to 5.5V. ## Active lifecycle — no end-of-life risk The DS1305EN+ carries an Active product status and is ROHS3 compliant. No last-time-buy or obsolescence notice applies. For new designs or ongoing production, this part is a stable line item — no need to qualify a replacement or stockpile for an EOL window.","metaTitle":"DS1305EN+ RTC Clock/Calendar SPI 20-TSSOP, Active","metaDescription":"DS1305EN+ real-time clock with SPI interface, 96B NVSRAM, trickle-charger, 25.3µA timekeeping. Active production, ROHS3 compliant. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Clock/Calendar","Package":"Tube","Features":"Alarm, Leap Year, NVSRAM, Trickle-Charger","Interface":"SPI","Date Format":"YY-MM-DD-dd","Memory Size":"96B","Time Format":"HH:MM:SS (12/24 hr)","Mounting Type":"Surface Mount","Package / Case":"20-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"20-TSSOP","Voltage - Supply, Battery":"2V ~ 5.5V","Current - Timekeeping (Max)":"25.3µA ~ 81µA @ 2V ~ 5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$7.5","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$7.50000","currency":"USD"},{"qty":10,"price":"$6.77500","currency":"USD"},{"qty":25,"price":"$6.46000","currency":"USD"},{"qty":100,"price":"$5.60910","currency":"USD"},{"qty":250,"price":"$5.35704","currency":"USD"},{"qty":500,"price":"$4.88436","currency":"USD"},{"qty":1000,"price":"$4.25412","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/DS1305.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What are the exact specifications of the DS1305EN+?","answer":"The DS1305EN+ is a clock/calendar RTC with SPI interface, 96B NVSRAM, alarm, leap-year support, and a trickle-charger. It operates from 2V to 5.5V, draws 25.3µA to 81µA in timekeeping, and is rated for -40°C to 85°C. Package is 20-TSSOP."},{"question":"Can the DS1305EN+ be used with a backup battery?","answer":"Yes. The DS1305EN+ has a dedicated battery input rated for 2V to 5.5V, and the integrated trickle-charger supports rechargeable coin cells or supercapacitors without external charging circuitry."},{"question":"Does DS1305EN+ have a trickle charger?","answer":"Yes, the DS1305EN+ includes a trickle-charger feature for recharging a backup battery or supercapacitor directly from the main supply."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1305EN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1305EN 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}}