SN74LS697NSRE4

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The SN74LS697NSRE4 is a common integrated circuit from Texas Instruments. It is a dual 4-bit synchronous decade counter, or counter that counts in a countdown mode. Counters are a type of digital logic integrated circuit used to measure an event or count the number of occurrences of a particular event. The SN74LS697NSRE4 is one of the most versatile counters due to its high-speed operation and ability to count over a wide range of values.

The SN74LS697NSRE4 is primarily used in applications requiring high speed counting, such as frequency division. It is designed to divide an incoming signal by 10, counting from 99 to 0, then resetting to 99. This allows the user to accurately measure frequency through a predetermined period of time.

The SN74LS697NSRE4 is a synchronous counter, meaning that each of the 4-bit counters can be clocked simultaneously by a single source. This eliminates the need for multiple clock signals, as all inputs and outputs are in sync with each other. The counters are fully synchronous, meaning that each output will respond to the same clock signal, making it ideal for applications requiring precise timing.

The SN74LS697NSRE4 has four data inputs, three control inputs, and nine data outputs. Each counter consists of four ripple–carry type Flip-flops. The four data inputs are connected to the D inputs of the four Flip-flop stages and will take the input data and store it for the duration of the clock cycle. The three control inputs are Reset, Load, and Clock. The Reset input will reset the counter to its initial state, the Load input will load the data from the data inputs into the counter, and the Clock input will clock the data through the counter. The 0-9 outputs will give the count as it advances through its cycle.

The SN74LS697NSRE4 is housed in a 16-pin DIP package and is capable of operating over a wide range of temperatures and voltages. It is powered by a single supply voltage ranging from 3V to 15V and can operate in temperatures ranging from -40°C to 125°C. This makes it ideal for use in a wide variety of applications, from industrial to consumer electronics.

In summary, the SN74LS697NSRE4 is a versatile counter that can be used in a variety of applications. It is capable of counting up to 99 and resetting to 99. It is a synchronous counter, meaning all counters will clock simultaneously. The four data inputs, three control inputs, and nine data outputs make it easy to use and configure. The low power consumption and wide range of operating temperatures and voltages make it a great choice for the modern designer.

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