MCP795B11T-I/ST

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The MCP795B11T-I/ST is a battery-backed clock/calendar function from Microchip Technology Inc. It has a built-in Real Time Clock/Calendar (RTC) with 128 byte battery-backed RAM, a clock/calendar alarm and Time-of-Day (ToD) interrupt function. It includes a 32.768 kHz crystal oscillator and an 11-bit counter. It is designed to store and provide time and date to an application such as a microprocessor, network server, or an embedded system.

Application Fields

The MCP795B11T-I/ST is used as a battery-backed Real Time Clock/Calendar (RTC) in a wide range of applications, including telecom and datacom, factory automation, healthcare and medical, military, smart metering, industrial automation, and surveillance. In addition, it supports time-of-day (ToD) interrupts for applications such as time synchronization, and for system activities that require accurate timekeeping.

The features of the MCP795B11T-I/ST include a built-in 32.768 kHz crystal oscillator, a battery-backed clock/calendar and RAM, a ToD interrupt and a clock/calendar alarm. The RTC has four channels, allowing a range of dates and times to be stored and retrieved.

Working Principle

The MCP795B11T-I/ST contains an oscillator, which is a high-quality quartz crystal oscillator. The oscillator is powered by an external power supply and provides an oscillation frequency of 32.768 kHz. This frequency is used to generate 1 Hz clock pulses monitored by the RTC. The oscillator is connected to a power-management unit, which is used to control the operation of the oscillator and to prevent the oscillator from being powered-off due to a sudden power failure. Additionally, a battery-backup is included to ensure operation in the event of power failure.

The 32.768 kHz quartz crystal oscillator is a low-power, low-jitter oscillator. It works by creating an alternating current which results in a vibrating crystal. This vibrating crystal acts as a periodic wave generator, creating the signal used by the RTC to keep track of time. The signal is then divided down to 1 Hz, providing an accurate clock source to the system.

The MCP795B11T-I/ST also includes a time-of-day interrupt, which allows the system to notify the application when a defined time-of-day has been reached. The time-of-day interrupt can be used to wake the system or to set alarms. The interrupt is generated when a predefined time-of-day is matched with the current time. The interrupt can be used to indicate the system time or to synchronize external events.

The MCP795B11T-I/ST also includes a clock/calendar alarm, which allows the system to send a signal when the clock/calendar matches a predefined alarm time. The alarm can be used to wake the system or to synchronize external events. The alarm supports multiple alarm settings, allowing a range of alarm times to be used.

Finally, the MCP795B11T-I/ST also includes a 128 byte battery-backed RAM, which allows data to be held during a power failure. This RAM also allows for data retention for up to ten years. This RAM can be used to store time-of-day values, alarm settings, application data, etc., which can be accessed even in the event of a power failure.

The MCP795B11T-I/ST is a low-power, low-jitter Real Time Clock/Calendar that is used in a wide range of applications. It is available in many packages, allowing it to be used in different applications. Additionally, it includes a 32.768 kHz quartz crystal oscillator, a battery-backed RAM and a clock/calendar alarm, allowing it to keep track of time in a precise and efficient manner. It is a reliable, easy-to-use solution for many different types of applications.

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