DS1394U-33+ The DS1394U-33+ is a low-voltage SPI Real-Time Clock/Calendar from Analog Devices / Maxim Integrated. It provides timekeeping functions with leap-year compensation and an alarm.
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DS1394U-33+

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Mfr Name: Analog Devices / Maxim Integrated
Analog Devices / Maxim Integrated
The DS1394U-33+ is a low-voltage SPI Real-Time Clock/Calendar from Analog Devices / Maxim Integrated. It provides timekeeping functions with leap-year compensation and an alarm.
✓ Total Stock: 7 pcs

DS1394U-33+ Available from 1 distributor

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DS1394U-33+ Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Current
Date Format
Features
Interface
Mounting Type
Operating Temperature
Supplier Device Package
Supplier Package
Time Format
Type
Voltage

DS1394U-33+ Description

Short technical summary and product information.

The DS1394U-33+ is a low-voltage Real-Time Clock (RTC) and calendar IC from Analog Devices / Maxim Integrated, featuring an SPI-compatible interface. It accurately counts hundredths of seconds, seconds, minutes, hours, day, date, month, and year, with automatic adjustments for month lengths and leap years up to 2100. The device supports both 12-hour and 24-hour formats with an AM/PM indicator.

 

Key features include a programmable time-of-day alarm, power-fail detect and switch circuitry to a backup supply, and trickle-charge capability. The output pin is configurable as an interrupt or a square wave generator with selectable frequencies. The DS1394U-33+ operates over a wide voltage range of 1.3V to 5.5V and is rated for the industrial temperature range of -40°C to +85°C.

 

This RTC is available in a 10-pin uMAX/uSOP package, suitable for surface mounting. Its compact size and robust features make it ideal for applications such as hand-held devices, GPS/telematics, embedded time stamping, and medical devices where reliable timekeeping is essential.

DS1394U-33+ Quick Information

Product Type: Real-Time Clock
Canonical Name: DS1394U-33+ SPI Real-Time Clock/Calendar
Subcategory: Clock/Calendar

DS1394U-33+ Compliance

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

DS1394U-33+ Features

  • Counts time with leap-year compensation up to 2100.
  • Programmable time-of-day alarm included.
  • Power-fail detect and switch circuitry.
  • SPI interface supports modes 0 and 2.
  • Operates from 1.3V to 5.5V.

DS1394U-33+ Applications

  • Ideal for hand-held devices.
  • Suitable for GPS/telematics systems.
  • Used for embedded time stamping.
  • Applicable in medical devices.

DS1394U-33+ FAQs

5 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the DS1394U-33+?

The operating voltage range is 1.3V to 5.5V.

What package type is the DS1394U-33+ available in?

The DS1394U-33+ is available in a 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) package.

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

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

Does the DS1394U-33+ support leap year compensation?

Yes, it counts the year with leap-year compensation valid up to 2100.

What interface does the DS1394U-33+ use?

The DS1394U-33+ uses an SPI interface.

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