Maxim Integrated DS1340U-3+T&R Real-Time Clock

The DS1340U-3+T&R from Maxim Integrated is a highly integrated, low-power real-time clock (RTC) with a full binary-coded decimal (BCD) clock/calendar and 56 bytes of NV SRAM. This precision timekeeping device is designed to provide a comprehensive timekeeping solution for a wide range of applications including embedded systems, industrial controllers, and consumer electronics.

With its simple I2C interface, the DS1340U-3+T&R allows for easy integration into most microcontroller-based systems. The RTC maintains seconds, minutes, hours, day, date, month, and year information, with automatic leap year compensation valid up to the year 2100. The device also provides a programmable square-wave output that can be used for various applications, such as periodic system wake-ups or basic clocking.

The DS1340U-3+T&R operates over a wide voltage range of 2.7V to 5.5V and features a robust trickle-charge capability that allows an external capacitor or rechargeable battery to be connected to the VBACKUP pin. This ensures that timekeeping is maintained even when the main power supply is interrupted, making it ideal for systems that require continuous time tracking and data retention.

Key features of the DS1340U-3+T&R include:

• Low-power consumption, extending battery life for backup power supplies
• 56 bytes of battery-backed NV SRAM for data storage
• Automatic power-fail detect and switch circuitry
• Trickle-charge capability to maintain timekeeping during power interruptions
• Programmable square-wave output for additional functionality
• Compliance with the RoHS directive, making it an environmentally friendly choice

The device comes in a compact 8-pin µSOP package, making it suitable for space-constrained applications. The DS1340U-3+T&R is also available in tape and reel (T&R) packaging, facilitating efficient handling and manufacturing processes for high-volume production.

With its combination of features, the Maxim Integrated DS1340U-3+T&R RTC offers a reliable and versatile timekeeping solution that can be easily integrated into a variety of electronic products, ensuring accurate time and data management.