{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1305E+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1305E","canonicalUrl":"https://icboms.com/analog-devices/DS1305E","factsUrl":"https://icboms.com/api/mcp/products/DS1305E%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices DS1305E+ Clock/Calendar RTC, SPI interface, 96B NVSRAM, Alarm, Leap Year, Trickle-Charger, 20-TSSOP package, 2V-5.5V supply.","salesMarkdown":"## SPI RTC with 96B NVSRAM and trickle-charger The DS1305E+ is a full-featured real-time clock (RTC) from Analog Devices, providing seconds, minutes, hours, day, date, month, and year information with leap-year compensation through 2100. It communicates over a 4-wire SPI interface and includes 96 bytes of NVSRAM for user data storage. On-chip features include a programmable alarm, a trickle-charger for backup battery management, and automatic leap-year correction. The timekeeping current ranges from 25.3 µA to 81 µA depending on supply voltage (2V to 5V), making it suitable for battery-backed applications. ## Supply voltage and temperature grade The DS1305E+ operates from a single 2V to 5.5V supply and supports a separate battery backup input (VBAT) with the same voltage range. The trickle-charger feature allows a super-cap or rechargeable lithium cell to be charged from the main supply, maintaining the timekeeping and NVSRAM contents during main power loss. The timekeeping current varies with voltage and temperature — at 2V the typical draw is 25.3 µA, rising to 81 µA at 5V. The supplier device package is 20-TSSOP.","metaTitle":"Analog Devices DS1305E+ RTC Clock/Calendar, SPI, 20-TSSOP","metaDescription":"DS1305E+ SPI RTC with 96B NVSRAM, alarm, trickle-charger. Active production, ROHS3 compliant. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Clock/Calendar","Package":"Tube","Features":"Alarm, Leap Year, NVSRAM, 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":"20-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2V ~ 5.5V","Operating Temperature":"0°C ~ 70°C","Supplier Device Package":"20-TSSOP","Voltage - Supply, Battery":"2V ~ 5.5V","Current - Timekeeping (Max)":"25.3µA ~ 81µA @ 2V ~ 5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$6.87","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.87000","currency":"USD"},{"qty":10,"price":"$6.21000","currency":"USD"},{"qty":25,"price":"$5.92160","currency":"USD"},{"qty":100,"price":"$5.14170","currency":"USD"},{"qty":250,"price":"$4.91064","currency":"USD"},{"qty":500,"price":"$4.47732","currency":"USD"},{"qty":1000,"price":"$3.89961","currency":"USD"},{"qty":2500,"price":"$3.75518","currency":"USD"}]},"links":{"datasheetUrl":null,"sourceUrl":null},"ai":{"faq":[{"question":"Where can I buy DS1305E+ and how do I get a price?","answer":"The DS1305E+ is sourced to order through independent and authorized distribution channels."},{"question":"What is DS1305E+'s listed type and package?","answer":"The DS1305E+ is a Clock/Calendar RTC supplied in a 20-TSSOP surface-mount package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1305E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1305E when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T18:25:00.589Z","lastPublished":"2026-07-20T18:25:00.589Z","indexable":true}}