N74F191D,623

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The N74F191D,623 is a high-speed synchronous presettable 4-bit binary up/down counter, with configurable modulus-N and a max count rate at 133 MHz. This structure can be used for counting, frequency and period measurement, timing, dividing and pulse generation. It is useful in applications such as programmable-divider circuits, down-counter circuits, up/down counters, and frequency measurement and mixing.

The first stage of the N74F191D,623 consists of configurable logic blocks, which include multiplexers, inverters, registers, etc. The logic blocks can be configured to perform different functions, such as up-counters, down-counters and divider circuits. The counter can be programmed as a single 4-bit counter or as a series of cascaded 4-bit counters, depending on the requirements of the application.

The second stage of the N74F191D,623 is an on-chip, static state register. This register is used to store and hold the count, so that when the counter reaches the modulus-N, the next count is stored in the register. The modulus-N is determined by applying a control logic bit to the configurable logic block. The max count rates for the N74F191D,623 is 133 MHz, so it is suitable for high speed applications.

The N74F191D,623 can also be used as a divide-by-N counter. A divide-by-N counter divides the incoming signal by an integer number. It can be configured to divide the input signal by any positive integer power of two, such as 16, 32, 64, etc. The divide-by-N can also be used for frequency division, frequency conversion and waveform shaping.

The working principle of the N74F191D,623 is that when triggered, the counter starts counting up or down, depending on the applied control logic. As the counter counts, it stores the count in the on-chip state register. When the counter reaches the modulus-N value, the stored count is reset to zero and the next count is incrementally changed. This process is repeated until the end of the cycle.

The N74F191D,623 is widely used for counting, dividing, period measurement, and pulse generation. It can be used in motor control, robotics, smart grids, monitoring and surveillance systems, signal processing, automotive and aircraft guidance systems, mobile communication systems, real-time clocks and watches, consumer electronics, and many more.

In summary, the N74F191D,623 is an advanced and fast synchronous presettable 4-bit binary up/down counter. It is suitable for high-speed applications and is used for counting, dividing, period measurement, and pulse generation. The modulus-N can be configured and the max count rate is 133 MHz. It is widely used in many different applications.

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