{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1501WZ+T&R","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1501WZTR","canonicalUrl":"https://icboms.com/analog-devices/DS1501WZTR","factsUrl":"https://icboms.com/api/mcp/products/DS1501WZ%2BT%26R","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices DS1501WZ+T&R Clock/Calendar RTC, Parallel Interface, 256B NVSRAM, 28-SOIC (7.50mm), Tape & Reel.","salesMarkdown":"## Active-production RTC with integrated NVSRAM The DS1501WZ+T&R is a parallel-interface real-time clock (RTC) from Analog Devices, classified under Microcontrollers & Processors (MCU / MPU / DSP) for its integrated timekeeping and 256-byte NVSRAM. ## Battery-backup and timekeeping current The RTC accepts a separate battery supply from 2.5V to 3.7V, maintaining timekeeping and NVSRAM retention when the main 3V–3.6V rail drops. Maximum timekeeping current draw is 4mA across the full supply range — this is the worst-case figure for sizing the backup battery capacity in an unpowered state. ## Feature set and interface Beyond basic clock/calendar functions, the DS1501WZ+T&R integrates an alarm, a square-wave output, a watchdog timer, and a leap-year compensation circuit. The Y2K compliance flag ensures the date rollover past 1999 is handled correctly — relevant for embedded systems with long service lives. The parallel interface provides direct byte-wide access to the timekeeping and NVSRAM registers, which simplifies firmware integration on MCUs with a parallel memory bus but consumes more GPIO than an I²C/SPI RTC. Housed in a 28-SOIC wide-body package (0.295-inch body width, 7.50mm) with surface-mount termination.","metaTitle":"DS1501WZ+T&R RTC Clock/Calendar, Parallel, 28-SOIC","metaDescription":"DS1501WZ+T&R RTC from Analog Devices, 3V-3.6V supply, 256B NVSRAM, alarm, watchdog. Active production, ROHS3. Quoted per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Microcontrollers & Processors (MCU / MPU / DSP)"],"specifications":{"Type":"Clock/Calendar","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Alarm, Leap Year, NVSRAM, Square Wave Output, Watchdog Timer, Y2K","Interface":"Parallel","Date Format":"YY-MM-DD-dd","Memory Size":"256B","Time Format":"HH:MM:SS (24 hr)","Mounting Type":"Surface Mount","Package / Case":"28-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"28-SOIC","Voltage - Supply, Battery":"2.5V ~ 3.7V","Current - Timekeeping (Max)":"4mA @ 3V ~ 3.6V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.71","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.71000","currency":"USD"},{"qty":10,"price":"$9.84400","currency":"USD"},{"qty":25,"price":"$9.43600","currency":"USD"},{"qty":100,"price":"$8.31380","currency":"USD"},{"qty":250,"price":"$7.90576","currency":"USD"},{"qty":500,"price":"$7.39572","currency":"USD"},{"qty":1000,"price":"$6.78366","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1501WZTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1501WZTR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}