74 series digital circuit of 7495A 74LS95B 4-bit parallel access shift register

Published:2011/3/31 22:07:00 Author:Ecco | Keyword: digital circuit , 4-bit , parallel access , shift register | From:SeekIC

7495A, 74LS95B, 74HC95, 74C954-bit parallel access shift register It has the parallel input and serial input, parallel output, mode control and two clock input; There are 3 compute modes, parallel writing, right shift (from QA to QD), left shift(from QD to QA). When doing left shift, QB connects A, QC connects to B, QD connects C, the serial data is input by D, a, b, c, d are equal to the level of A, B, C, D which are stable state input levels. Before establishing stable state input, QAo, QBo, QCo, QDo=QA, QS, QC, QD. Before the latest clock shift, QAn, QBn, QCn, QDn=QA, QS, QC, QD.



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