{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1340U-33+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1340U-33","canonicalUrl":"https://icboms.com/analog-devices/DS1340U-33","factsUrl":"https://icboms.com/api/mcp/products/DS1340U-33%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices DS1340U-33+ Clock/Calendar RTC, I²C 2-Wire Serial interface, 8-uMAX/uSOP package, Tube, -40°C to 85°C, 2.97V to 5.5V supply.","salesMarkdown":"## I²C RTC with trickle-charge backup The DS1340U-33+ is a Clock/Calendar real-time clock from Analog Devices, communicating over an I²C (2-Wire Serial) bus. It keeps time in YY-MM-DD-dd date format and HH:MM:SS (24 hr) time format, with leap-year compensation built in. A trickle-charger on the backup battery input means the RTC can maintain timekeeping from a rechargeable cell or supercap when main power drops — useful for data-loggers and metering gear that need timestamp retention through brief outages. ## Supply and timekeeping budget The battery-backup input accepts 1.3 V to 5.5 V, so a 3 V lithium coin cell or a 1.5 V alkaline cell both work. Timekeeping current maxes at 150 µA at 5.5 V — low enough that a 220 mAh coin cell lasts over 60 days in backup mode, assuming the RTC is the only load on the battery. The 8-uMAX/uSOP package (3.00 mm wide) is a standard footprint for pick-and-place; no tombstoning risk if the pad geometry matches the recommended land pattern.","metaTitle":"DS1340U-33+ RTC, I²C Clock/Calendar, 8-uMAX, -40 to 85°C","metaDescription":"Analog Devices DS1340U-33+ I²C RTC with trickle-charger, 2.97-5.5V supply, 150µA timekeeping current. Active, ROHS3. Quoted to order.","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":"Tube","Features":"Leap Year, Trickle-Charger","Interface":"I²C, 2-Wire Serial","Date Format":"YY-MM-DD-dd","Time Format":"HH:MM:SS (24 hr)","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.97V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"8-uMAX/uSOP","Voltage - Supply, Battery":"1.3V ~ 5.5V","Current - Timekeeping (Max)":"150µA @ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.14","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.14000","currency":"USD"},{"qty":10,"price":"$4.61500","currency":"USD"},{"qty":25,"price":"$4.36320","currency":"USD"},{"qty":100,"price":"$3.78140","currency":"USD"},{"qty":250,"price":"$3.58752","currency":"USD"},{"qty":500,"price":"$3.21908","currency":"USD"},{"qty":1000,"price":"$2.71488","currency":"USD"},{"qty":2500,"price":"$2.57914","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"What is the I²C interface speed of DS1340U-33+?","answer":"The DS1340U-33+ uses a standard I²C (2-Wire Serial) interface. The evidence does not specify a maximum clock frequency, but typical RTCs in this family support 400 kHz (Fast-mode). Confirm the bus timing in the full datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1340U-33","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1340U-33 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}}