{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1344D-3+T&R","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1344D-3TR","canonicalUrl":"https://icboms.com/analog-devices/DS1344D-3TR","factsUrl":"https://icboms.com/api/mcp/products/DS1344D-3%2BT%26R","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated DS1344D-3+T&R, Clock/Calendar RTC, SPI, 96B NVRAM, Alarm, Trickle Charger, 2.7V-5.5V, -40°C~85°C, 14-TDFN (3x3), Tape & Reel.","salesMarkdown":"## SPI bus and trickle-charger — integration notes The SPI interface keeps the pin count low — four wires (SCLK, MOSI, MISO, CS) plus the interrupt/alarm output. The trickle charger is a series diode and current-limiting resistor network that charges a backup battery or supercap from the main VCC; the datasheet shows the selectable resistor values. The square-wave output can drive a microcontroller interrupt or a status LED without an external transistor. The 96-byte NVRAM is accessed over the same SPI bus and retains data as long as the backup supply is present. ## Active lifecycle — no end-of-life pressure on this BOM line The DS1344D-3+T&R carries an Active product status from Maxim Integrated, with ROHS3 compliance. There is no NRND or last-time-buy notice on this part. For a production BOM that needs a reliable SPI RTC with on-chip NVRAM, this part is a current-design-in choice, not a scavenge part.","metaTitle":"DS1344D-3+T&R RTC Clock/Calendar, SPI, 96B NVRAM, 14-TDFN","metaDescription":"Maxim DS1344D-3+T&R real-time clock/calendar with SPI interface, 96B NVRAM, alarm, trickle charger. Industrial temp -40 to 85°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Clock/Calendar","Package":"Tape & Reel (TR); Cut Tape (CT)","Features":"Alarm, Leap Year, NVRAM, Square Wave Output, 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":"14-WFDFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"2.7V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"14-TDFN (3x3)","Voltage - Supply, Battery":"1.3V ~ 5.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.21","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.21000","currency":"USD"},{"qty":10,"price":"$5.57700","currency":"USD"},{"qty":25,"price":"$5.27200","currency":"USD"},{"qty":100,"price":"$4.56920","currency":"USD"},{"qty":250,"price":"$4.33492","currency":"USD"},{"qty":500,"price":"$3.88972","currency":"USD"},{"qty":1000,"price":"$3.28048","currency":"USD"},{"qty":2500,"price":"$3.11646","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/DS1343-DS1344.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What does the DS1344D-3+T&R datasheet specify?","answer":"The datasheet specifies a real-time clock/calendar with SPI interface, 96 bytes of NVRAM, alarm, leap-year compensation, square-wave output, and a trickle charger. It operates from 2.7V to 5.5V main supply with a separate battery input from 1.3V to 5.5V, over -40°C to 85°C, in a 14-TDFN (3x3 mm) package."},{"question":"Is there a drop-in replacement or equivalent for DS1344D-3+T&R?","answer":"Maxim does not list a direct pin-compatible second source for this exact order code. The DS1344 family shares the same SPI interface and feature set across density options; verify the specific package (14-TDFN) and temperature grade before substituting."},{"question":"How do I connect DS1344D-3 to a microcontroller?","answer":"Connect the SPI pins (SCLK, MOSI, MISO, CS) to the microcontroller's SPI bus. Provide a 2.7V to 5.5V supply on VCC and a backup battery on VBAT. The exposed pad on the 14-TDFN package should be soldered to the PCB ground plane for thermal management."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1344D-3TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1344D-3TR 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}}