CD74HC4020MG4

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CD74HC4020MG4 is a 14-stage ripple counter with terminal count of 16384. It is an asynchronous counter (ripple counter). As its name suggests, it belongs to the category of logic called counter/dividers generally used for frequency division.

The CD74HC4020MG4 contain an on-chip oscillator and 14 ripple counters. The purpose of this device is to provide an easy-to-implement, higher-count ripple counter circuit suitable for precision timing and frequency division applications.

The main components of the CD74HC4020MG4 are the input (CLK) terminal, which is used to provide the Clock input signal, the output (QΝ) terminal and the reset terminal (RΝ). The Clock input (CLK) is used to clock the data into the stage. QΝ is used to provide outputs in serial form, and the Reset (RΝ) is used to reset the divider for a new cycle.

CD74HC4020MG4 is a high-speed CMOS logic. It is fabricated with sub-micron silicon gate MOS technology to achieve both high speed and good power dissipation. Its high speed makes it suitable for use in data processing, communication applications and high-speed logic designs. This device is packaged in 14 pin plastic dual-in-line package.

The application field of CD74HC4020MG4 includes frequency divider and prescaler, frequency synthesizer, rate multiplier, and single-chip clock generator. It can be used to divide the frequency of a high-speed clock to a lower speedclock, while maintaining a good accuracy. It is also used in many microcontroller and microprocessor divisions, variable time base generators and time-slot interrupt generators in data conversion systems.

The working principle of CD74HC4020MG4 is quite simple. As the Clock is fed to the CLK pin of the CD74HC4020MG4, the state of the input is propagated through the ripple counter stages. This process is called gating. When the CLK pin is at logic 1, the signal from the CLK pin is propagated through the first stage and then on to the next stage and so on. When the count reaches the terminal count (16384), the signal is sent out of the QΝ pin, where it can be used as address and/or data input of memory devices. The RΝ pin is used to reset the chip when a new cycle of counting is desired.

In summary, CD74HC4020MG4 is a 14-stage ripple counter that is mainly used to divide the frequency of a high-speed clock. It is a high-speed CMOS logic device that is packaged in 14 pin plastic dual-in-line package. Its application fields include frequency divider/prescaler, frequency synthesizer, rate multiplier and single-chip clock generator. Its working principle is one of gating in which the cascading of signals through the successive stages occurs when the CLK pin is at logic 1, and when the terminal count is triggered, the signal is sent out through the QΝ pin.

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