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74AC11194 Datasheet(PDF) 2 Page - Texas Instruments |
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74AC11194 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 8 page 74AC11194 4–BIT BIDIRECTIONAL UNIVERSAL SHIFT REGISTER SCAS093 – NOVEMBER 1989 – REVISED APRIL 1993 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 Function Table INPUTS OUTPUTS CLEAR MODE CLOCK SERIAL PARALLEL QA QB QC QD CLEAR S1 S0 CLOCK LEFT RIGHT A B C D QA QB QC QD L X X X X X X X X X L L L L H X XL X XX XXX QA0 QB0 QC0 QD0 H H H ↑ X Xa bc d a bc d H L H ↑ X HX XXX H QAn QBn QCn H L H ↑ X LX XXX L QAn QBn QCn H H L ↑ H XX XXX QBn QCn QDn H H H L ↑ L XX XXX QBn QCn QDn L H L L X X X X X X X QAO QBO QCO QDO H = high level (steady state) L = low level (steady state) X = irrelevant (any input, including transitions) ↑ = transition from low to high level a,b,c,d = the level of steady-state input at inputs A, B, C, or D, respectively. QAO, QBO, QCO, QDO = the level of QA, QB, QC, or QD, respectively, before the indicated steady-state input conditions were established. QAn, QBn, QCn, QDn = the level of QA, QB, QC, or QD respectively, before the most-recent ↑ transition of the clock. timing clear, load, right-shift, inhibit, and clear sequences CLK S0 QC CLR QB QA Load Shift Right Mode Control Inputs S1 QD R Serial Data Inputs L A Parallel Data Inputs B H L C D H L Outputs CLR Shift Left Inhibit CLR |
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