Analog Devices Inc./Maxim Integrated

DS1391U-3+T&R  

Real Time Clocks ICs

DS1391U-3+T&R Description

The DS1391U-3+T&R is a high-performance Real-Time Clock (RTC) and Calendar IC designed for precision timekeeping in a wide range of electronic applications. Manufactured by Analog Devices Inc./Maxim Integrated, this device offers robust performance and reliability, making it an ideal choice for systems requiring accurate timekeeping. The DS1391U-3+T&R features a SPI interface, allowing for seamless integration into various electronic systems. It operates within a supply voltage range of 2.7V to 3.3V and consumes a maximum of 125µA during timekeeping, ensuring low power consumption. The device supports both 12-hour and 24-hour time formats, providing flexibility in time display options.

DS1391U-3+T&R Features

• Low Power Consumption: With a maximum timekeeping current of 125µA at 2.7V to 3.3V, the DS1391U-3+T&R ensures minimal power usage, making it suitable for battery-operated devices.
• Wide Supply Voltage Range: The device operates within a supply voltage range of 2.7V to 3.3V, offering compatibility with various power supply configurations.
• Flexible Time Format: Supports both 12-hour and 24-hour time formats, providing flexibility to meet different user preferences and application requirements.
• SPI Interface: The DS1391U-3+T&R features a SPI interface, enabling easy communication and integration with microcontrollers and other system components.
• Battery Backup: The device supports a battery supply voltage range of 1.3V to 3.7V, ensuring continuous timekeeping even in the event of main power failure.
• Surface Mount Technology: The DS1391U-3+T&R is available in a surface mount package, facilitating efficient PCB design and assembly.
• Compliance and Standards: The device is REACH unaffected and RoHS3 compliant, ensuring it meets environmental and safety standards.
• Moisture Sensitivity Level: With an MSL rating of 1 (Unlimited), the DS1391U-3+T&R is suitable for a wide range of manufacturing environments without the need for special handling.

DS1391U-3+T&R Applications

The DS1391U-3+T&R is ideal for a variety of applications where accurate timekeeping is essential. Some specific use cases include:

• Consumer Electronics: Ideal for devices such as digital cameras, media players, and smart home devices that require accurate time display and logging.
• Industrial Systems: Suitable for industrial control systems, PLCs, and other equipment that need reliable timekeeping for data logging and process control.
• Telecommunications: Can be used in network equipment, routers, and other telecom devices to maintain accurate time synchronization.
• Medical Devices: Applicable in medical equipment where precise timekeeping is crucial for monitoring and logging patient data.
• Automotive Systems: Useful in automotive applications such as infotainment systems, telematics, and onboard diagnostics that require accurate timekeeping.

Conclusion of DS1391U-3+T&R

The DS1391U-3+T&R is a versatile and reliable RTC and Calendar IC that offers a combination of low power consumption, flexible time format options, and robust performance. Its wide supply voltage range, SPI interface, and battery backup capabilities make it an excellent choice for a variety of applications across consumer, industrial, and automotive sectors. With its compliance to environmental and safety standards, the DS1391U-3+T&R ensures that it meets the requirements of modern electronic systems. Whether used in consumer electronics, industrial control systems, or automotive applications, the DS1391U-3+T&R provides accurate and dependable timekeeping, making it a valuable component in any system that requires precise timing.

DS1391U-3+T&R Documents

Download datasheets and manufacturer documentation for DS1391U-3+T&R

Datasheets :

DS1390 - 94      

Other Related Documents :

Tips for Writing Bulletproof Real-Time Clock Control Code      

Application Notes :

Estimating Super Capacitor Backup Time on Trickle-Charger Real-Time Clocks       Selecting a Backup Source for Real-Time Clocks       Oscillator Design Considerations for Low-Current Applications       State Machine Logic in Binary-Coded Decimal (BCD)-Formatted Real-Time Clocks      

Environmental Information :

Maxim Integrated RoHS Cert       Maxim Integrated REACH       Material Declaration DS1391U-3+T&R