{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1687-3+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1687-3","canonicalUrl":"https://icboms.com/analog-devices/DS1687-3","factsUrl":"https://icboms.com/api/mcp/products/DS1687-3%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1687-3+ Clock/Calendar RTC, Parallel interface, 242B NVSRAM, Y2K-compliant, 2.7V–3.7V supply, 2 mA timekeeping, 24-EDIP through-hole, 0°C–70°C.","salesMarkdown":"## Parallel RTC with 242 bytes of NVSRAM The Maxim Integrated DS1687-3+ is a parallel-interface real-time clock and calendar with 242 bytes of nonvolatile SRAM integrated into a single 24-pin EDIP module. It tracks time in HH:MM:SS (12/24-hour) and date in YY-MM-DD-dd format, includes alarm, square-wave output, and Y2K compliance. The through-hole 24-DIP module (0.600-inch body) is socket-friendly — a part you can swap on site with a chip puller and no hot air. ## Supply range and battery backup Runs from a 2.7 V to 3.7 V main supply, with a separate battery input accepting 2.5 V to 3.7 V. Timekeeping current draws 2 mA max at 3 V — modest for a parallel RTC with embedded NVSRAM. The battery pin keeps the clock and the 242-byte SRAM alive when the main rail drops; a 3 V lithium coin cell (CR2032 or equivalent) is the typical choice. ## Commercial temperature, active lifecycle Rated for 0°C to 70°C operation — commercial grade, meant for office equipment, point-of-sale terminals, industrial controllers in conditioned spaces.","metaTitle":"DS1687-3+ RTC Clock/Calendar, 242B NVSRAM, Parallel, 24-EDIP","metaDescription":"Maxim Integrated DS1687-3+ real-time clock with 242B NVSRAM, parallel interface, Y2K-compliant. 2.7V–3.7V supply, 2 mA timekeeping current. 24-EDIP","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Clock/Calendar","Package":"Tube","Features":"Alarm, NVSRAM, Square Wave Output, Y2K","Interface":"Parallel","Date Format":"YY-MM-DD-dd","Memory Size":"242B","Time Format":"HH:MM:SS (12/24 hr)","Mounting Type":"Through Hole","Package / Case":"24-DIP Module (0.600\\\", 15.24mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 3.7V","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"24-EDIP","Voltage - Supply, Battery":"2.5V ~ 3.7V","Current - Timekeeping (Max)":"2mA @ 3V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$18.07","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$18.07000","currency":"USD"},{"qty":10,"price":"$16.60800","currency":"USD"},{"qty":25,"price":"$15.91960","currency":"USD"},{"qty":100,"price":"$14.02650","currency":"USD"},{"qty":250,"price":"$13.33808","currency":"USD"},{"qty":500,"price":"$12.47754","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/DS1685-DS1687.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the DS1687-3+ a direct replacement for the DS1687?","answer":"Yes, the DS1687-3+ is the 3 V supply variant of the original DS1687 (which required 5 V). The pinout and function are identical; the main difference is the supply voltage range (2.7 V to 3.7 V for the -3+ vs 4.5 V to 5.5 V for the DS1687). If your board was designed for the 5 V part, you will need to drop the main rail to 3.3 V or lower and ensure the battery voltage is within 2.5 V to 3.7 V."},{"question":"What battery voltage does the DS1687-3+ require?","answer":"The battery backup input accepts 2.5 V to 3.7 V. A standard 3 V lithium coin cell (CR2032) works directly. Do not use a 5 V backup battery — it exceeds the maximum rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1687-3","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1687-3 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}}