HD74AC194 4-bit Bidirectional Unviersal Shift Register Description This bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register.
It features parallel inputs, parallel outputs, right shift and left shift serial inputs, operating mode control inputs, and a direct overriding clear line.
The register has four destinct modes of operation: parallel (broadside) load, shift right (in the direction Q 0 toward Q3); shift left; inhibit clock (do nothing).
Synchronous parallel loading is accomplished by applying the four bits of data and taking both mode control inputs, S 0 and S 1, high.
The data are loaded into their respect...

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