SN74HCT273PWG4

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The SN74HCT273PWG4 is a part of the HCT (High-Speed CMOS) family of devices produced by Texas Instruments. In the logic family of Flip-Flops and related devices, it is a integrated octal D-type flip-flop. This review takes closer look into this chip and covers information related to its application and working principles.

The SN74HCT273PWG4 has eight data inputs and eight data outputs which allows it to accept binary words simultaneously. It also has eight active low data preset and clear inputs, meaning that setting and resetting is completely synchronous on polarity of the clock inputs. Logic high levels at the clock input, referred to as D-pulse state, trigger all data (D) inputs to be transferred simultaneously to their corresponding outputs.

The flip-flop acts as a bridge between two logic categories, synchronous and asynchronous. On one side, the clock, usually an oscillator such as a crystal oscillator, is used to synchronize the operations of the system and units, while on the other hand, asynchronous data is used to propagate through it. Coupled with the other functions of the SN74HCT273PWG4, such as asynchronous data reset, it serves as a medium between the two logic systems.

The device can be used for a variety of applications, such as data transfer and storage, static latch functions, D-type clocked latches and counters. For example, it can be used for data transfer, especially for transferring data from the buffer register to a printer. The device can also be used for detection and synchronization, it can be used to detect certain signals such as the zero of a pulse from a pulse generator or to synchronize a control signal coming from a processor to a data storage.

The working principle of the SN74HCT273PWG4 can be understood in two parts, the internal logic and the timing components. Internally, the flip-flop contains three main components - eight D-type flip-flops, eight active low data preset and clear inputs and eight data outputs. The eight D-type flip-flops are connected in a 8 by 8 matrix, with each flip-flop having an associated output and preset/clear input. The preset/clear input is used to either assign a logic high or low to the output depending on the logic state of the preset/clear signal.

Timing components remain the same regardless of the application, and these depend on two parameters - the setup time and the hold time of the data inputs. Both of these components depend on the clock signal, with the setup time being a minimum amount of time after the rising edge of the clock pulse that the data needs to remain valid. The hold time is the minimum amount of time before the rising edge of the clock for which the data needs to be valid.

The output of the signal is triggered when the clock signal reaches a logic high state, which is referred to as the D-pulse state. When the signal is triggered, the data stored on all of the eight data inputs is transferred to the eight data outputs simultaneously. The SN74HCT273PWG4 can also be used in applications that require continuous data storage, as its eight data inputs and outputs allow it to store entire binary words.

In summary, the SN74HCT273PWG4 is a member of TI’s HCT logic family and serves as an octal D-type flip-flop. It can be used in applications such as data transfer, storage and synchronization. Its working principles involve timing components such as setup times and hold times as well as internal logic that forms a 8 by 8 matrix. Together, these components make SN74HCT273PWG4 a versatile and convenient device for many applications.

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