PT7C4502-2WF

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PT7C4502-2WF Real Time Clock (RTC) is a monolithic CMOS integrated circuit designed to provide time and date information. The PT7C4502-2WF RTC combines a very low supply current of 400 nA and a low frequency 32.768 KHz oscillator, with internal circuitry for providing the accuracy and timing stability available from an external crystal. The PT7C4502-2WF is a highly integrated RTC for providing extensive real-time clock control in embedded systems.

The RTC has a built-in frequency compensation oscillator that is driven by a 32.768KHz crystal, which provides timekeeping accuracy over a wide temperature range. The 2-wire serial (I2C) interface is used to access the PT7C4502-2WF or to read the 32-bit time/date information. The PT7C4502-2WF also features a 3-bit programmable output port that can be used to control external devices.

The features of PT7C4502-2WF are: 32.768KHZ oscillator output; 5-volt operational voltage; 2-wire serial interface; 3-bit programmable output port; leap year adjustment; watch-dog timer; and status bits for detecting system reset conditions. The watch-dog timer helps protect against system failure, and the status bits provide useful information about the current system state.

The PT7C4502-2WF RTC can be used in both commercial and industrial applications. It is especially suitable for applications, such as industrial automation, medical equipment, safety control, industrial networking, and machine control where accuracy and reliability are essential. The PT7C4502-2WF RTC is also well suited for embedded systems in which a precise and reliable reference is needed to synchronization and control the interaction of the overall system.

The principle of operation of PT7C4502-2WF is simple and straightforward. The 32.768KHz oscillator output is sent to a frequency divider circuit which reduces the frequency to 1Hz. This 1Hz signal is then used to drive the time/date registers, and also to generate an interrupt signal which can be used to detect external events. The 2-wire interface can be used to read the time/date information, or to write to the registers. The programmable output port can be used to generate signals to control external devices.

In summary, PT7C4502-2WF is a low power, high accuracy real time clock with a 2-wire serial interface and 3-bit programmable output port. The device offers a high degree of flexibility, accuracy and reliability, making it ideal for embedded systems which require precise system synchronization and control.

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