DS17487-3+

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DS17487-3+ is a low-power, low-profile Real Time Clock (RTC) designed to provide time-of-day scheduling, alarm/event/calendar functions, and timekeeping capability. This device has both a battery backup supply and a steady-state accuracy of ±2ppm. It is available with a range of options, allowing the user to customize the product to the desired application requirements.

Overview

The DS17487-3+ RTC is based on the XTR 2-Wire Serial Bus (I2C) interface from Silicon Labs and is compatible with various 3.3V or 5.0V devices. It features a VCC oscillator for maximum accuracy and stability, programmable 32KHz and 32.768KHz oscillators, Real-Time Clock independent of the oscillator frequency, and easy-to-use compact package design. DS17487-3+ also allows users to set a frequency at which oscillator waits until an external device requests data, allowing reduced power consumption.

Application Field

The DS17487-3+ can be used in numerous applications that require a real-time clock and calendar, such as medical devices, energy monitoring systems, automotive applications, industrial automation, and the Internet of Things (IoT). It is also ideal for embedded systems that need a high level of accuracy, low power consumption, and wide dynamic range. With its integrated low-power design, the DS17487-3+ also provides backup supply for RTC when main power is lost, ensuring accuracy and data retention even in the event of a power loss.

Working Principle

The DS17487-3+ RTC works through an integrated oscillator, with an internal RC oscillator or an external crystal oscillator. The crystal oscillator determines the real time clock\'s accuracy, stability, and accuracy over time. The oscillator setting also determines the level of noise rejection in the RTC, allowing it to operate reliably in max noise environment.

The system will combine the oscillator with the internal 22-bit timer to calculate and maintain the time data, providing time-of-day, alarm/event/calendar data, and a variety of capabilities. The RTC will also automatically handle leap years and keep track of the time and date. Users can program a variety of settings, such as start and end times, day of week (DOW), leap-year counter, and more.

The DS17487-3+ also has a temperature-compensation feature, allowing it to be used in industrial temperature applications. It is rated from -40 to +125°C and features integrated power failure detection, providing reliable, wide-temperature operation for embedded systems.

Conclusion

The DS17487-3+ is a valuable RTC solution for a wide range of applications. Its integrated low-power design makes it ideal for embedded systems that need accurate timekeeping and reliability. The product offers superior accuracy and wide dynamic range, along with a temperature-compensation feature that ensures reliable performance in any environment. With its range of options, the DS17487-3+ is a comprehensive RTC solution that can meet a variety of application needs.

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