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DS1339U-33+T&R The DS1339U-33+T&R is a serial real-time clock from Analog Devices / Maxim Integrated. It offers I2C interface and operates within a temperature range of -40°C to 85°C.
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DS1339U-33+T&R

Available from 3 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The DS1339U-33+T&R is a serial real-time clock from Analog Devices / Maxim Integrated. It offers I2C interface and operates within a temperature range of -40°C to 85°C.
✓ Total Stock: 2,159 pcs

DS1339U-33+T&R Available from 3 distributors

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Xingangxin ✓
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1,803 pcs
On Request
1803 pcs On Request 1 On Request On Request On Request On Request On Request
Risen Electronics ✓
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356 pcs
On Request
356 pcs On Request 1 On Request On Request On Request On Request 2026-02-23 21:33:16
Kinova ✓
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On Request
On Request
On Request On Request 1 On Request On Request On Request On Request 2026-04-21 02:16:47
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DS1339U-33+T&R Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Date Format
Features
Interface
Lead Spacing
Mounting Type
Operating Temperature
Supplier Device Package
Time Format
Type
Voltage
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DS1339U-33+T&R Description

Short technical summary and product information.

The DS1339U-33+T&R is a low-power serial real-time clock (RTC) from Analog Devices / Maxim Integrated. This clock/date device manages all timekeeping functions, including seconds, minutes, hours, day, date, month, and year, with leap-year compensation valid up to 2100. It features two programmable time-of-day alarms and a programmable square-wave output.

 

Designed for interfacing with most microcontrollers, it utilizes an I2C serial interface. The device operates within a voltage range of 1.3V to 3.7V and consumes a low current of 200µA at 5.5V. Its built-in power-sense circuit automatically detects power failures and switches to a backup supply, ensuring continuous time, date, and alarm operation. The operating temperature range is -40°C to 85°C.

 

This RTC is available in an 8-uMAX/uSOP package, specifically an 8-TSSOP, 8-MSOP with a width of 0.118" (3.00mm). It supports both 12-hour and 24-hour time formats with an AM/PM indicator. The device also includes trickle-charge capability and is UL Recognized.

DS1339U-33+T&R Quick Information

Product Type: Real Time Clock
Canonical Name: DS1339U-33+T&R Serial Real-Time Clock
Subcategory: Clock/Calendar

DS1339U-33+T&R Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

DS1339U-33+T&R Features

  • Manages all timekeeping functions accurately.
  • Includes two programmable time-of-day alarms.
  • Features a programmable square-wave output.
  • Utilizes a low-power I2C serial interface.
  • Automatic power-fail detect and switch circuitry.

DS1339U-33+T&R Applications

  • Suitable for handheld devices like GPS.
  • Used in consumer electronics like set-top boxes.
  • Applicable in office equipment such as printers.
  • Can be used in medical devices like glucometers.
  • Designed for telecommunications equipment.

DS1339U-33+T&R FAQs

7 frequently asked questions generated from this part’s specifications.
What are the key features of the DS1339U-33+T&R?

The DS1339U-33+T&R features include alarm functionality, leap year compensation, a square-wave output, and trickle-charger capability.

What is the operating temperature range for this real-time clock?

The operating temperature range is -40°C to 85°C.

What package is the DS1339U-33+T&R supplied in?

The supplier device package is 8-uMAX/uSOP.

What type of interface does the DS1339U-33+T&R use?

It uses an I²C, 2-Wire Serial interface.

What is the voltage range for the DS1339U-33+T&R?

The voltage range is 1.3V to 3.7V.

What is the current consumption of the DS1339U-33+T&R?

The current consumption is 200µA at 5.5V.

Does the DS1339U-33+T&R support both 12-hour and 24-hour time formats?

Yes, it supports HH:MM:SS (12/24 hr) time format.

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