{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1388Z-33+T&R","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1388Z-33TR","canonicalUrl":"https://icboms.com/analog-devices/DS1388Z-33TR","factsUrl":"https://icboms.com/api/mcp/products/DS1388Z-33%2BT%26R","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices DS1388Z-33+T&R Clock/Calendar RTC, I2C 2-Wire Serial interface, 512B EEPROM, 8-SOIC package, 2.97V-3.63V supply, -40°C to +85°C, Tape & Reel.","salesMarkdown":"## What the DS1388Z-33+T&R brings to a timekeeping design The DS1388Z-33+T&R is a serial real-time clock (RTC) with a full clock/calendar function — tracks seconds, minutes, hours, day, date, month, and year with leap-year compensation through 2099. The I²C 2-wire serial interface keeps the bus wiring minimal: SDA and SCL plus the interrupt output, all on a standard 8-SOIC footprint. Beyond basic timekeeping, this part integrates an EEPROM (512 bytes), a power-fail supervisor, a trickle-charger for backup battery management, and a watchdog timer — all in one 8-pin package. That consolidation saves board space and reduces the component count in a metering, data-logging, or alarm panel design. ## Supply rails and timekeeping current — the power budget Timekeeping current maxes at 150 µA across the full supply range — this is the current drawn from the backup source when the main rail is absent. For a 225 mAh CR2032 coin cell, that works out to roughly 1500 hours of backup at the worst-case draw; actual battery life will be longer at the typical current.","metaTitle":"DS1388Z-33+T&R RTC, I2C, 8-SOIC, Analog Devices","metaDescription":"DS1388Z-33+T&R RTC with EEPROM, supervisor, trickle-charger, watchdog. I2C interface, 512B memory, 2.97-3.63V supply, -40 to +85°C. Active production, 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":"EEPROM, Leap Year, Supervisor, Trickle-Charger, Watchdog Timer","Interface":"I²C, 2-Wire Serial","Date Format":"YY-MM-DD-dd","Memory Size":"512B","Time Format":"HH:MM:SS:hh (12/24 hr)","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.97V ~ 3.63V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"8-SOIC","Voltage - Supply, Battery":"1.3V ~ 5.5V","Current - Timekeeping (Max)":"150µA @ 2.97V ~ 3.63V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.18","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.18000","currency":"USD"},{"qty":10,"price":"$5.58100","currency":"USD"},{"qty":25,"price":"$5.32120","currency":"USD"},{"qty":100,"price":"$4.62030","currency":"USD"},{"qty":250,"price":"$4.41268","currency":"USD"},{"qty":500,"price":"$4.02334","currency":"USD"},{"qty":1000,"price":"$3.50420","currency":"USD"},{"qty":2500,"price":"$3.37441","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/9507d8f82bd5808d9b5469b4bd4286cc.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1388Z-33TR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1388Z-33TR 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}}