{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DS1342U+T&R","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"DS1342UTR","canonicalUrl":"https://icboms.com/analog-devices/DS1342UTR","factsUrl":"https://icboms.com/api/mcp/products/DS1342U%2BT%26R","rawCanonicalId":null},"summary":{"shortDescription":"Maxim DS1342U+T&R, Clock/Calendar RTC, I2C 2-Wire Serial, Alarm/Leap Year/Square Wave Output, 1.8V-5.5V, -40°C to 85°C, 8-uMAX/uSOP, Tape & Reel.","salesMarkdown":"## Device overview and key features Timekeeping current is specified at 0.6µA to 0.7µA at 3V to 5V, which is the headline spec for battery-backed applications where every microamp matters. The industrial temperature range of -40°C to 85°C covers most embedded, telecom, and industrial equipment environments. ## Lifecycle and sourcing status The DS1342U+T&R is listed as Active on the manufacturer's lifecycle record and is ROHS3 compliant. This is not an NRND or EOL part — it remains a current-production device suitable for new designs and ongoing production. There is no last-time-buy window to track, and no PCN-driven urgency to secure inventory. As an active Maxim (now Analog Devices) RTC, the DS1342U+T&R is available through independent distribution channels. ## I2C interface and integration notes Communication is via a standard I2C 2-wire serial interface, which requires only SDA and SCL lines plus pull-up resistors. The DS1342U+T&R functions as an I2C slave device. The alarm feature generates an interrupt or can be polled; the square-wave output provides a programmable frequency reference without needing an external oscillator buffer.","metaTitle":"Maxim DS1342U+T&R RTC Clock/Calendar, I2C, 8-uMAX","metaDescription":"Maxim DS1342U+T&R RTC with I2C interface, alarm, 0.6µA timekeeping, industrial temp. 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":"Tape & Reel (TR); Cut Tape (CT)","Features":"Alarm, Leap Year, Square Wave Output","Interface":"I²C, 2-Wire Serial","Date Format":"YY-MM-DD-dd","Time Format":"HH:MM:SS (12/24 hr)","Mounting Type":"Surface Mount","Package / Case":"8-TSSOP, 8-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"1.8V ~ 5.5V","Operating Temperature":"-40°C ~ 85°C","Supplier Device Package":"8-uMAX/uSOP","Current - Timekeeping (Max)":"0.6µA ~ 0.7µA @ 3V ~ 5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.67","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.67000","currency":"USD"},{"qty":10,"price":"$3.29300","currency":"USD"},{"qty":25,"price":"$3.11320","currency":"USD"},{"qty":100,"price":"$2.69820","currency":"USD"},{"qty":250,"price":"$2.55984","currency":"USD"},{"qty":500,"price":"$2.29694","currency":"USD"},{"qty":1000,"price":"$1.93718","currency":"USD"},{"qty":3000,"price":"$1.84032","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/DS1341-DS1342.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the DS1342U+T&R vs the DS1340?","answer":"The DS1340 is an earlier-generation RTC in the same family with similar I2C interface and timekeeping functionality. The DS1342U+T&R adds a programmable square-wave output and operates down to 1.8V (vs 2.7V for the DS1340), which is the key differentiator for low-voltage or battery-backed designs. Both are pin-compatible in the 8-uMAX package, but the DS1342 is the preferred choice for new designs requiring the wider supply range and square-wave feature."},{"question":"What is the DS1342U+T&R package and footprint?","answer":"The DS1342U+T&R is supplied in an 8-uMAX/uSOP package, which is footprint-compatible with 8-TSSOP and 8-MSOP (0.118\", 3.00mm width). The T&R suffix means it ships in Tape & Reel format for pick-and-place assembly. The mounting type is Surface Mount."},{"question":"How do I set the alarm on the DS1342?","answer":"The alarm is configured through the I2C interface by writing to the alarm registers (seconds, minutes, hours, day/date). The alarm can be set to trigger on a match of seconds, minutes, hours, day, or any combination. When the alarm matches, the INT/SQW pin can be configured to output an interrupt signal. Refer to the device datasheet for the register map and programming sequence."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/DS1342UTR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/DS1342UTR 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}}