SN74LV4040AN

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Symmetrical counter circuits, like the SN74LV4040AN, are logic devices that utilize inputs to count the timing of signals in order to provide outputs. Such devices can be used to control and synchronize signals generated and sent from multiple sources.

The SN74LV4040AN is an 8-bit asynchronous binary counter produced by Texas Instruments. It is designed to function as a division-of-frequency device, such as rate or time division multiplexers, up/down counters, or programmable timer and event counters.

Application Field

The SN74LV4040AN is primarily used as an asynchronous binary counter. It can be used to control and synchronize signals generated and sent from multiple sources, such as timer and event counters. Additionally, it can be used to divide frequency, such as rate or time division multiplexers or programmable interval generators.

The SN74LV4040AN can also be used to accumulate frequency deviations in frequency division multiplex applications. It can accumulate information from two voltage-controlled oscillators and convert it into information where it can be detected and compared.

The SN74LV4040AN can also be used in industrial and process control applications, such as pulse width modulation (PWM) controllers, up/down and direction counters, and interface reset and debounce circuits.

Working Principle

The SN74LV4040AN counter circuit contains eight output stages with individualinhibit inputs and a common parallel-load input. When the load input is taken low, the counter is reset to zero. Each output stage of the SN74LV4040AN is capable of operating in ahigh or a low state, depending on the state of its corresponding inhibit input and the state of theprevious output stage.

When all inhibit inputs are taken low and the load input is taken high, the counter increments each time the clock input is taken low. The first output stage will increment to the high state if it is currently in the low state when the clock input is taken low. The next output stage will increment to the high state if the previous stagewas in the high state at the time the clock input is taken low. This process will repeat through all eight output stages.

When any of the inhibit inputs are taken high, the corresponding output stage willstay in the same state even if the clock input is taken low. This can be used to program the counter tocount up to a certain number, such as four or eight.

The SN74LV4040AN is also capable of being preset by taking its parallel-load inputlow before its clock input is taken low. This allows the user to preset the counter to a certain count before the counter begins its normal counting cycle.

The SN74LV4040AN is a versatile counter circuit and is capable of a variety of counting configurations. It is easy to use, versatile, and reliable. It is an ideal choice for any application where a binary counter is needed.

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