{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1308U-33+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1308U-33T","canonicalUrl":"https://icboms.com/analog-devices/DS1308U-33T","factsUrl":"https://icboms.com/api/mcp/products/DS1308U-33%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices DS1308U-33+T, Clock/Calendar RTC, I²C 2-Wire Serial, 56B NVSRAM, 3V–5.5V, -40°C–85°C, 8-uMAX/uSOP.","salesMarkdown":"## Active RTC with I²C interface and 56-byte NVSRAM The DS1308U-33+T from Analog Devices is an active-production real-time clock (RTC) in the 8-uMAX/uSOP package, providing a complete clock/calendar function with 56 bytes of NVSRAM for data logging or alarm configuration. ## Timekeeping features and NVSRAM for system context The clock tracks time in HH:MM:SS format with 12-hour or 24-hour mode, and the calendar maintains YY-MM-DD-dd with automatic leap-year correction through 2099. 56 bytes of NVSRAM retain user data across power cycles — enough for a calibration constant, serial number, or last-event timestamp without external EEPROM. A square-wave output pin provides a programmable frequency reference (1 Hz, 4 kHz, 8 kHz, or 32 kHz) that can clock an external MCU or drive a status LED without an additional oscillator. ## Package options and board integration The DS1308U-33+T is supplied in the 8-uMAX/uSOP package (3.00 mm body width, 0.65 mm pitch), which is footprint-compatible with the 8-TSSOP and 8-MSOP land patterns — a single PCB layout serves both package variants. Ordering code suffix -33+T indicates the tape-and-reel (TR) and cut-tape (CT) packaging options; the TR variant is suited for automated pick-and-place assembly, while CT is available for prototype or low-volume builds. Fully ROHS3 compliant (lead-free, no exemptions), the part meets the EU RoHS directive for unrestricted shipment into European markets without a hazardous-substance declaration.","metaTitle":"DS1308U-33+T RTC Clock/Calendar, I²C, 56B NVSRAM, 8-uMAX","metaDescription":"Analog Devices DS1308U-33+T RTC, I²C interface, 56B NVSRAM, 3V–5.5V supply, -40°C to +85°C, 8-uMAX/uSOP. Active lifecycle, ROHS3 compliant. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"Clock/Calendar","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Leap Year, NVSRAM, Square Wave Output","Interface":"I²C, 2-Wire Serial","Date Format":"YY-MM-DD-dd","Memory Size":"56B","Time Format":"HH:MM:SS (12/24 hr)","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"8-uMAX/uSOP","Voltage - Supply, Battery":"1.3V ~ 5.5V","Current - Timekeeping (Max)":"125µA ~ 200µA @ 3V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.98","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.98000","currency":"USD"},{"qty":10,"price":"$4.47000","currency":"USD"},{"qty":25,"price":"$4.22600","currency":"USD"},{"qty":100,"price":"$3.66260","currency":"USD"},{"qty":250,"price":"$3.47480","currency":"USD"},{"qty":500,"price":"$3.11792","currency":"USD"},{"qty":1000,"price":"$2.62957","currency":"USD"},{"qty":3000,"price":"$2.49809","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/82ade77f112c11cc79b8093a9c750bc1.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What compliance documentation does Analog Devices provide for the DS1308U-33+T?","answer":"The DS1308U-33+T is ROHS3 compliant (lead-free, no exemptions). No REACH, UL, or IEC certification is listed in the available documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1308U-33T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1308U-33T 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}}