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Orders over $200 are eligible for a limited edition Chinese-style gift.

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These offers are applicable to both new and existing customers and are valid from January 1st, 2024, to December 31st, 2024.

  • Manufacturer:


  • Datasheet:

    DS1339U-33 datasheet

  • Package/Case:


  • Product Category:

    Clock & Timer Ics

  • RoHS Status:

Submit your quote request now, and we expect to provide a quote within June 26, 2024. Place your order now, and we expect to complete the transaction within June 28, 2024. Ps:Time is according to GMT+8:00.

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Stock:1000 PCS

Our commitment is to deliver prompt quotations within 12 hours. For further assistance, please contact us at [email protected].

DS1339U-33 Product Details


The DS1339 serial real-time clock(RTC) is a lowpower clock/date device with two programmable time of-day alarms and a programmable square-wave output. Address and data are transferred serially through an I 2C bus. The clock/date provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The DS1339 has a built-in powersense circuit that detects power failures and automatically switches to the backup supply, maintaining time, date, and alarm operation.


Handhelds (GPS, POS Terminals)

Consumer Electronics (Set-Top Box, Digital Recording, Network Appliance)

Office Equipment (Fax/ Printers, Copier)

Medical (Glucometer, Medicine Dispenser)

Telecommunications  (Routers, Switches, Servers)

Other (Utility Meter, Vending Machine, Thermostat, Modem)


Real-Time Clock(RTC)Counts Seconds,Minutes, Hours,Day,Date,Month,and Year with LeapYear Compensation Valid Up to 2100

Available in a Surface-Mount Package with an Integrated Crystal (DS1339C)

I2C Serial Interface 

Two Time-of-Day Alarms 

Programmable Square-Wave Output 

Oscillator Stop Flag 

Automatic Power-Fail Detect and Switch Circuitry 

Trickle-Charge Capability 

Underwriters Laboratory(UL)Recognized

Request a quote DS1339U-33 at censtry.com. All items are new and original with 365 days warranty! The excellent quality and guaranteed services of DS1339U-33 in stock for sale, check stock quantity and pricing, view product specifications, and order contact us:[email protected].
The price and lead time for DS1339U-33 depending on the quantity required, please send your request to us, our sales team will provide you price and delivery within 24 hours, we sincerely look forward to cooperating with you.


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