M74HC164B1R

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M74HC164B1R is a high-speed 8-bit parallel datapath shift register with 3-state output. It is a type of Logic - Shift Registers which are widely applicable in various systems to carry out data transfer and computing operations.

The M74HC164B1R consists of eight three-state D-type flip-flops that are connected in series by a single clock-pulse count. Each stage of the register is preceded by an input and followed by an output of buffering capability. The signal into and out of the output of each stage is buffered. The clock signal is given to the shift register to shift the data bit in each stage serially. The signal that is input into the 1st stage becomes the output signal of the last stage simultaneously. All outputs of the register are in either high impedance or high logical level.

The main application field of the M74HC164B1R is data transferring and computing operation. It is often used in computers which use buses with multiplexed, interfacing and controlling peripheral devices for data transfer. This shift register is also useful for controlling the output pressure of differential pressure in various industrial gas and liquid dispensing systems.

The M74HC164B1R uses two distinct working principles. In the first principle, there is a four bit control line for controlling the IO pins. The four bits can control the IO pins on either side of the shift register from HIGH to LOW. Furthermore, the M74HC164B1R enables two data paths - parallel and serial - to be used for interpreting data by the registers.

In the parallel data path mode, the data is inputted into the register simultaneously by the 8 data lines, DI0-DI7. The internal flip-flops are set to either HIGH or LOW depending on the data that is inputted simultaneously. In serial data path mode, data is input sequentially through the SDI (serial data in) pin by the clock pulse. The data bits that is shifted sequentially appears at the output of the register, DO0-DO7.

The M74HC164B1R also supports a so-called "read mode" operation which is similar to the "write mode" operation. The chip allows data to be read from the shift register by controlling the CD (clear data) and RR (read) pins for parallel data path mode. For serial data path mode, the data bits are shifted out serially through the SDI (serial data in) pin by controlling the RR (read) and CP (clock) pins. This feature allows the user to essentially use one serial data path to read and write data bits to or from the shift register.

The M74HC164B1R also supports various other operations such as producing ripple counters and controlled operations such as writing and/or reading operations.

In conclusion, the M74HC164B1R is a high-speed 8-bit parallel datapath shift register with 3-state output, functioning as one type of Logic - Shift Registers. It performs high-speed data transferring and computing operations, allowing two distinct modes of data path, parallel and serial, to be used efficiently. It is a valuable tools for various systems to carry out data transfer and computing operations.

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