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DS1338U-33+T&R The DS1338U-33+T&R is a serial real-time clock (RTC) from Analog Devices. It features an I2C interface and 56 bytes of NV SRAM.
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DS1338U-33+T&R

Available from 5 distributors
Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The DS1338U-33+T&R is a serial real-time clock (RTC) from Analog Devices. It features an I2C interface and 56 bytes of NV SRAM.
✓ Total Stock: 24,236 pcs

DS1338U-33+T&R Available from 5 distributors

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DS1338U-33+T&R Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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DS1338U-33+T&R Description

Short technical summary and product information.

The DS1338U-33+T&R is a low-power serial real-time clock (RTC) IC from Analog Devices, offering full binary-coded decimal (BCD) clock/calendar functionality along with 56 bytes of non-volatile SRAM. Data is transferred serially via an I2C interface. The clock manages seconds, minutes, hours, day, date, month, and year, with automatic adjustments for month length and leap years, supporting dates up to 2100.

 

Key features include a built-in power-sense circuit that detects power failures and switches to a backup supply, maintaining time and date operation. It operates within an industrial temperature range of -40°C to +85°C and supports a voltage range of 1.3V to 3.7V. The device provides a programmable square-wave output signal and has unlimited writes to its battery-backed RAM.

 

This component is available in a surface-mount package, specifically an 8-uMAX/uSOP or 8-TSSOP, 8-MSOP configuration, simplifying design and saving space. Its I2C interface allows for easy integration with most microcontrollers. Applications include handheld devices, consumer electronics, office equipment, medical devices, and telecommunications.

DS1338U-33+T&R Quick Information

Product Type: Real-Time Clock IC
Canonical Name: DS1338U-33+T&R Real-Time Clock IC
Subcategory: Real Time Clocks

DS1338U-33+T&R Compliance

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

DS1338U-33+T&R Features

  • Serial real-time clock with I2C interface.
  • Includes 56 bytes of battery-backed NV SRAM.
  • Automatic power-fail detect and switch circuitry.
  • Operates from -40°C to 85°C industrial temperature.
  • Surface-mount 8-uMAX/uSOP package.

DS1338U-33+T&R Applications

  • Ideal for handheld devices like GPS.
  • Suitable for consumer electronics applications.
  • Used in office equipment such as printers.
  • Applicable for medical devices.
  • Supports telecommunication systems.

DS1338U-33+T&R FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the DS1338U-33+T&R?

The operating voltage range is 1.3V to 3.7V.

What is the operating temperature range?

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

What type of interface does this real-time clock use?

This real-time clock uses an I²C, 2-Wire Serial interface.

How much non-volatile SRAM is available on this device?

The device features 56 bytes of general-purpose, battery-backed NV SRAM.

What package is the DS1338U-33+T&R supplied in?

It is supplied in an 8-uMAX/uSOP or 8-TSSOP, 8-MSOP package.

Does this real-time clock have leap year compensation?

Yes, it includes leap year compensation valid up to the year 2100.

Does the DS1338U-33+T&R have automatic power-fail detection?

Yes, it has a built-in power-sense circuit that detects power failures and automatically switches to the backup supply.

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