RTC-72421B: ROHS

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Real Time Clocks (RTCs) provide a reference of time used widely in a variety of applications. At the most basic level, a Real Time Clock is a digital circuit that counts the time while accounting for scheduled events, such as alarms, times of day and other information. The RTC-72421B is a Real Time Clock designed to track time accurately with features that make it ideal for use in design projects, from robotics to high security applications.

ROHS Compliance

The RTC-72421B is designed to comply with ROHS (Restriction of Hazardous Substances) requirements. This means that the Real Time Clock has no lead or other hazardous material ingredients, reducing its environmental impact. It also conforms to the recommended CE and FCC standards for safe, reliable operation.

Applications

Almost any application requiring accurate time measurements can use the RTC-72421B, such as system and device control, time-stamping, alarm monitoring, power-saving functions, automatic data logging, and more. The RTC-72421B is ideal for use when precision timing is needed – it is easy to configure and offers high precision time-keeping accuracy, making it a great choice for applications that need reliable reference time.

Features and Benefits

The RTC-72421B is equipped with a wide range of features and benefits that make it an attractive choice for applications requiring highly accurate time measurements. It has a backup battery to ensure the RTC continues to maintain accurate time even during power outages. It also provides the ability to create alarms and functions that can be triggered on schedule. The chip is designed to take up very limited board space, making it suitable for use in small, compact designs.

Working Principle

The RTC-72421B operates by tracking the elapsed time since first use. This is done with an internal quartz oscillator, which counts cycles in the seconds, minutes, hours, days and years. This quartz oscillator produces a 32.768 kHz output frequency, which is then broken up into cycles of time and counted. This allows the RTC to accurately track time even when the internal clock is manually adjusted or reset.

The RTC-72421B is programmed on a first use basis and continues to track time based on that programming. The chip also contains a thermally compensated oscillator circuit, allowing the RTC to automatically adjust to temperature variation and still maintain accurate time readings.

Conclusion

The RTC-72421B is an ideal choice for applications requiring accurate time measurements with features designed to make it suitable for even small and compact designs. Its ROHS compliance ensures it has a lower environmental impact and it conforms to recommended CE and FCC standards for safe and reliable operation. The chip is easy to configure and offers high precision time-keeping accuracy, making it a great choice when reliable reference time is needed. The internal quartz oscillator makes it possible for the RTC to maintain accurate time readings, even when environment factors such as temperature are present.

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