DS1339C-2#

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The DS1339C-2# is a real-time clock chip used to keep track of time and dates. It is a low-power clock/calendar with an operating temperature range of -40 to +85 °C that uses GMT or local time format.

This chip has two modes that it can operate in; the 12-25 hour format or the 24-hour format. When in 24-hour mode, days and dates can be set or changed manually or through a program. The Oscillator Stop Flag (OSF) can be used to detect when the oscillator has stopped and the power-fail indicator (PI) will detect when the main system has failed and this will cause the oscillator to reset when the power is restored. In addition, the chip has three unique alarm functions; a single daily alarm, multiple daily alarm, and a periodic alarm. The alarm time for each alarm can be changed manually or through a program.

In terms of the application field, this chip is suitable for systems that need an accurate and reliable real-time clock. Its low-power operation enables it to be used in many battery-powered devices, including personal digital assistant (PDA), mobile phones, laptops, palmtops and smart cards. In addition, it is ideal for automotive, industrial and other commercial applications. It can also be used to power up systems with date and time information and can be used in combination with certified real-time operating systems (RTOS) and embedded firmware stacks.

In terms of working principle, this chip works by using a quartz crystal oscillator and an internal oscillator circuit to generate 32.768 kHz signal. The signal is then divided by a prescaler and then sent to the counters. The counters are used to provide a count of seconds, minutes, hours, date, month, day, and year. The chip also has leap year compensation and adjustable registers for time and date, which enables time and date to be set manually or by software. When the chip is programmed, it automatically sets and adjusts the time and date.

The DS1339C-2# real-time clock chip is a highly reliable and accurate chip for applications that need time and date information. Its low-power operation and wide operating temperature range make it suitable for use in many types of battery-powered applications. Moreover, its adjustable registers allow for time and date to be set and adjusted manually or through a program, making it an ideal choice for automotive, industrial and other commercial applications.

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