MM74HC4040SJX

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The MM74HC4040SJX is a 12-stage ripple-carry binary counter, which is constructed using advanced silicon gate CMOS technology. This counter is capable of counting up to 4096 input clock pulses before outputting a given result. The MM74HC4040SJX belongs to the Logic - Counters, Dividers product group, which can be used in applications such as frequency division and phase/timing control. The following sections will look at the MM74HC4040SJX’s application fields and working principle in more detail.

Application Field

The MM74HC4040SJX is typically used in applications where it is necessary to divide a high frequency clock input into a slower output frequency. One example where it is useful is when synchronizing two logic circuits with different clock rates. In this case, the MM74HC4040SJX could be used to divide the clock rate of the faster clock input by any integer multiple up to 4096 and then output the result at the same frequency rate as the slower clock circuit.

The MM74HC4040SJX is also popular for the frequency division of signals used for communication protocols. By using multiple stages of division, it can be used to generate extremely low frequency outputs from a higher input frequency. This allows communication protocols to be synchronized across longer distances or slower computation rates while ensuring data remains accurate.

Working Principle

The working principle of the MM74HC4040SJX can be broken down into two main steps. First, the counter is clocked and reset by an input clock and reset pin. The reset pin is typically driven by a logic high voltage, while the clock pin is driven by either a directly applied clock or derived clock from a divide-by-N circuit.

Once clocked and reset, the counter starts to divide the clock frequency by two every time the clock triggers an internal stage. This results in an output from Q0 through Q13, which increase in value from 0-4096 as the count proceeds. The output is then combined with the reset pin in order to reset the counter to 0 so that it can begin counting again.

Overall, the MM74HC4040SJX is an effective and efficient 12-stage ripple-carry binary counter for applications requiring frequency division or synchronizing two logic circuits with different clock rates. This counter is capable of counting up to 4096 pulses before outputting a given result, making it a popular choice for engineers looking to quickly and accurately divide signals with a wide range of frequencies.

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