74LS194A
Description
This bidirectional shift register is designed to incorporate virtually all of the features a system designer may want in a shift register they feature 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 distinct modes of operation namely
Parallel (broadside) load Shift right (in the direction QA toward QD) Shift left (in the direction QD toward QA) Inhibit clock (do nothing)
Synchronous parallel loading is acplished by applying the four bits of data and taking both mode control inputs S0 and S1 high The data is loaded into the associated flipflops and appear at the outputs after the positive transition of the clock input During loading serial data flow is inhibited
Shift right is acplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low
Serial data for this mode is entered at the shift-right data input When S0 is low and S1 is...
