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TC74ACT164FN 数据表(PDF) 2 Page - Toshiba Semiconductor |
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TC74ACT164FN 数据表(HTML) 2 Page - Toshiba Semiconductor |
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2 / 10 page ![]() TC74ACT164P/F/FN 2007-10-01 2 Pin Assignment IEC Logic Symbol Truth Table Inputs Outputs Serial IN CLR CK A B QA QB … QH L X X X L L … L H X X No change H L X L QAn … QGn H X L L QAn … QGn H H H H QAn … QGn X : Don’t care QAn~QGn: The level of QA~QG, respectively, before the most recent positive edge of the clock. (top view) GND QD QC QB QA B A 7 6 5 4 3 2 1 8 9 10 11 12 13 14 CK CLR QE QF QG QH VCC (8) (9) (1) (2) A B (5) R CK (6) QD QC (4) QB (3) QA C1/ → & CLR SRG8 1D (10) QE (11) QF (12) QG (13) QH |
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