DS1343D-3+

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DS1343D-3+ application field and working principle

The DS1343D-3+ is a Real Time Clock (RTC) designed for use in digital systems. The device utilizes an integrated, array of logic and Counter-Timer circuitry for data capture and timekeeping. The DS1343D-3+ was designed to store the time and serve as a reference clock in microcontroller-based systems.

Application Field

The DS1343D-3+ is often used to maintain an accurate time reference in embedded systems, radio-controlled clocks, sensors, bar code scanners, communication systems and industrial controllers. In addition, the device has attained increasingly high reliability over its predecessors, due to its sealed-package design, automatic power-demand testing, and robust reset capabilities.

Features

The DS1343D-3+ has a number of features designed to make it easier to use in digital systems. These include its 64-pin surface mount package, built-in oscillator, and user-programmable alarms and interrupt sources. The DS1343D-3+ also has special interface circuitry that allows the user to program the device from the system controller. The device also has low voltage operation and a wide temperature range.

Working Principle

The DS1343D-3+ is based on a series of oscillator, counter and logic circuits, combined to provide a timekeeping system with an accuracy of 1 ppm per year. The core of the device is the oscillator, which has an accuracy of 250 ppm. This oscillator provides a 31.25 Khz reference signal which is used to measure the timekeeping pulses which are then stored in the internal registers of the DS1343D-3+. The registers are accessed through an interface circuit, which can be programmed to interface with various microcontroller systems. The oscillator also has a low-voltage detection circuit, which allows the DS1343D-3+ to detect when power is low, and place the device in a low-power, low-current state.

The DS1343D-3+ also contains several counters and logic circuits for timekeeping functions. These circuits can store and interpret the timekeeping information in order to calculate the current date and time. The device also provides a programmable interrupt source for the microcontroller in order to signal the application when the time information has been updated. The device also has a watchdog timer circuit that can be used to reset the system if an error is detected.

The DS1343D-3+ can be used to provide an accurate source of time and date information to microcontroller based systems. The device is designed to be used in a variety of digital systems, and provides the flexibility to be used in a wide range of applications. The device is also easy to use and program, making it a useful tool for any digital engineer.

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