The DS1391U-3+ is a low-voltage, serial real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. This product is a part of the high-quality and reliable real-time clock solutions from Maxim Integrated, designed to provide precise time and date information for a wide range of applications.

Key Features

• Serial interface (SPI/3-Wire) for easy communication with microcontrollers
• Accurate timekeeping with integrated TCXO and crystal
• Low voltage operation from 2.7V to 5.5V
• Automatic backup switching to battery or supercapacitor
• Trickle-charge capability to maintain battery energy
• 56-Byte, battery-backed, nonvolatile (NV) RAM for data storage
• Compact 10-pin µSOP package

Applications

The DS1391U-3+ is ideal for a variety of applications that require accurate timekeeping and data storage upon power loss. These include:

• Handheld devices
• Medical devices
• Embedded systems
• Industrial controllers
• Point-of-sale (POS) terminals

Performance and Reliability

Maxim Integrated's DS1391U-3+ RTC provides a robust timekeeping solution with its integrated TCXO, ensuring high accuracy and stability over temperature. With its low-power consumption and wide operating voltage range, this RTC is suitable for battery-powered applications. The device also features a full calendar with an alarm function and a programmable square-wave output, making it versatile for various time-based tasks.

Design Support

Maxim Integrated offers comprehensive design support for the DS1391U-3+ including technical documentation, application notes, and reference designs to help accelerate the development process and reduce time to market.