{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1744-70IND+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1744-70IND","canonicalUrl":"https://icboms.com/analog-devices/DS1744-70IND","factsUrl":"https://icboms.com/api/mcp/products/DS1744-70IND%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim DS1744-70IND+, RTC Clock/Calendar with 32KB NVSRAM, Parallel Interface, Y2K/Leap Year, -40°C to 85°C, 4.5V-5.5V, 28-EDIP Through Hole.","salesMarkdown":"## RTC with integrated NVSRAM — what it is and where it fits The Maxim DS1744-70IND+ is a real-time clock (RTC) with 32KB of nonvolatile SRAM integrated into a single 28-pin EDIP module. It keeps time in YY-MM-DD-dd date format and HH:MM:SS (24-hour) time format via a parallel interface, and handles leap-year and Y2K rollover automatically. The 32KB NVSRAM retains data without external battery management — the module itself contains the SRAM and the power-fail control circuitry, so the backup battery (typically a lithium coin cell) connects directly to the module's Vbat pin. This part is rated for industrial environments with an operating temperature range of -40°C to 85°C, making it a fit for outdoor telecom gear, factory-floor controllers, data loggers, and any embedded system that needs a reliable timebase plus nonvolatile storage in one through-hole package. ## What the ratings mean for your BOM The 32KB NVSRAM holds configuration data, event logs, or calibration constants through a power loss. The 4mA timekeeping current at 5V is low enough for years of backup operation. ## Lifecycle and supply reality There is no NRND or EOL notice on this variant. It is ROHS3 compliant.","metaTitle":"DS1744-70IND+ RTC Clock/Calendar, 32KB NVSRAM","metaDescription":"Maxim DS1744-70IND+ RTC with 32KB NVSRAM, parallel interface, -40°C to 85°C, 28-EDIP. Active production. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Clock/Calendar","Package":"Tube","Features":"Leap Year, NVSRAM, Y2K","Interface":"Parallel","Date Format":"YY-MM-DD-dd","Memory Size":"32KB","Time Format":"HH:MM:SS (24 hr)","Mounting Type":"Through Hole","Package / Case":"28-DIP Module (0.600\\\", 15.24mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"28-EDIP","Current - Timekeeping (Max)":"4mA @ 5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$41.09","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$41.09000","currency":"USD"},{"qty":10,"price":"$38.33900","currency":"USD"},{"qty":25,"price":"$36.73160","currency":"USD"},{"qty":100,"price":"$33.28810","currency":"USD"},{"qty":250,"price":"$32.14024","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/DS1744-DS1744P.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does DS1744-70IND+ include a backup battery?","answer":"The DS1744-70IND+ module does not include a battery — it has a Vbat pin for an external backup battery (typically a CR2032 lithium coin cell). The module contains the SRAM and power-fail control, so the battery simply connects to Vbat."},{"question":"What is the memory size of DS1744-70IND+?","answer":"The DS1744-70IND+ integrates 32KB of nonvolatile SRAM."},{"question":"What is the difference between DS1744-70 and DS1744-70IND+?","answer":"The DS1744-70 is the commercial-temperature version (0°C to 70°C), while the DS1744-70IND+ is the industrial-temperature version (-40°C to 85°C). All other specs — 32KB NVSRAM, parallel interface, 28-EDIP package — are identical."},{"question":"Does DS1744-70IND+ require an external crystal?","answer":"No. The DS1744-70IND+ integrates the crystal and oscillator circuitry inside the module. No external crystal or resonator is needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1744-70IND","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1744-70IND 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}}