ISL12057IUZ-T

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The ISL12057IUZ-T is a very useful and highly accurate clock-calendar IC that utilizes an integrated ultra low-power oscillator design. It is designed to keep track of time, date and year while running on minimal power. The device encompasses an internal real-time clock with an industry-standard I²C bus interface. This IC is ideal for applications that require long battery life and extreme accuracy such as cellular phones, network equipment and smart meters, medical diagnostics and data loggers. This type of device is classified under the Clock/Timing category, specifically Real Time Clocks.

The ISL12057IUZ-T is composed of a microprocessor which operates on a low-voltage supply of 1.5-5.5V DC. This can help reduce power consumption and maintain the accuracy of the RTC over the extended period of operating temperature. The device also has power fail and reset detect, which ensures consistent timekeeping. It is designed to provide a programmable alarm and integrates a watchdog input that can be used to generate an alarm if a watchdog timeout is detected.

The main components of the ISL12057IUZ-T include an extremely accurate crystal-based oscillator designed to generate a stable clock reference, a programmable bus clock that can be used to interface to an external microprocesor, a low-frequency oscillator, a 32.768 kHz watch crystal oscillator which is used during low-voltage modes, a quartz crystal, and a counter with time-keeping registers for maintaining time information.

The real-time clock of the ISL12057IUZ-T contains a clock/calendar circuit which runs accurately on its own power supply. The 32.768 kHz watch crystal oscillator provides an accurate time base for the counter. The clock/ calendar circuit is used to store and provide the time, date and year whenever required. The clock circuitry is accurate to within a +/–25 ppm tolerance with a time-keeping accuracy of +/– 1 minute per month.

One of the main benefits of using the ISL12057IUZ-T is its capability to detect and react to power-fail situations. The reset input can be generated by an external power fail signal or by a brown-out detector. The chip will then use the onboard Low Frequency Oscillator (LFOSC) to provide a voltage regulated supply and operate the chip in an ultra-low power consumption mode. This helps maintain time accuracy during power down events. The device also includes an onboard pullup resistor for the I²C clock, as well as an onboard pull-up resistor for the SDA line.

The ISL12057IUZ-T is a great choice for clock-calendar applications requiring extreme accuracy, low power consumption, and long battery life. The device is designed to minimize power consumption while still providing superior accuracy and performance. Its low-voltage operation and power fail and reset detect features make it an ideal choice for powering a wide variety of embedded systems and industrial products.

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