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LD1117DTR

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File Size : 116 KB Manufacturer:ST 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 accomplished by applying the four bits of data and taking both mode control inputs S0 and S1 high The data is loaded into the associated flip- flops and appear at the outputs after the positive transition of the clock input During loading serial data flow is inhibit- ed Shift right is accomplished synchronously with the rising edge of the clock pulse when S0 is high and S1 is low