ISL12057IUZ

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The ISL12057IUZ Real Time Clock (RTC) is a low power, low cost I2C-bus compatible RTC device with a full-featured, low-power clock/calendar plus an impressive 512 x 8-bit user NVSRAM. It features a wide operating voltage range (1.2V to 3.6V), low operating current (<250nA @ VDD= 1.5V), programmable clock outputs, alarms and interrupts, and a wide range of tailored battery options.

The ISL12057IUZ is the ideal device for applications that require precise clock timing, accurate date/time keeping, and low power consumption. It can be used in many applications including industrial automation, car radios, GPS, and security systems. The RTC makes it possible to correctly set the date and time to ensure system synchronisation as well as to continually track elapsed time, down to a resolution of 1/100th of a second.

Working Principle

The ISL12057IUZ RTC uses a combination of an oscillator and a timer circuit, using a fixed frequency clock signal supplied by a quartz crystal and an electronic timer circuit. The oscillator portion is responsible for generating the precise time increments while the timer portion counts the time Increments and provides the time information (hour, minute, second, day, month, and year). The real time clock also tracks leap years, eliminates the need for manual time keeping, and can generate an interrupt or alarm at preset times.

The RTC employs a digital oscillator and divider circuit, consisting of a free-running counter and an oscillator, to create a precise real-time clock signal. The oscillator operates at a fixed frequency and determines the rate at which time related information is counted. The RTC provides a calendar, clock and a timer that is accurate up to one second.

Application Field

The ISL12057IUZ RTC is perfect for low power applications in the IoT markets, such as industrial automation, car radios, GPS and security systems. The RTC provides the ability to correctly set the date and time which is important for system synchronization and keeping track of elapsed time. It is also used in medical, scientific and satellite systems, as well as wireless communication and network devices. The RTC provides battery-backed long-term clock/calendar for data logging and retention.

For high-speed applications, the ISL12057IUZ RTC has an integrated programmable burst mode which reduces current consumption. It also has a temperature sensor, which can be used for temperature monitoring and compensation of clock drift. It can be programmed for interrupts, alarms and programmable clock outputs, making it a cost-effective clock solution for the most demanding applications.

The ISL12057IUZ is also an ideal device for medical applications as it features a built-in power fail detector circuit providing system security. In case of a power failure, the device switches to a battery back-up and continues to operate as normal. The internal temperature sensor is also useful in medical applications, as it can be used to accurately measure and monitor body temperature.

Conclusion

The ISL12057IUZ Real Time Clock offers an impressive range of features and functions, making it perfect for a wide range of applications. It is an ideal device for industrial automation, car radios, GPS, and security systems, as it provides accurate date and timekeeping, battery backed-up long-term clock/calendar, programmable clock outputs, alarms and interrupts. The RTC also has an integrated programmable burst mode reducing current consumption, as well as a temperature sensor for temperature monitoring and compensation of clock drift. It is a cost-effective, reliable clock solution for the most demanding applications.

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