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SN74HC393DG4 数据表(PDF) 2 Page - Texas Instruments |
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SN74HC393DG4 数据表(HTML) 2 Page - Texas Instruments |
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2 / 21 page ![]() SN54HC393, SN74HC393 DUAL 4-BIT BINARY COUNTERS SCLS143D – DECEMBER 1982 – REVISED JULY 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 FUNCTION TABLE COUNT SEQUENCE (each counter) COUNT OUTPUTS COUNT QD QC QB QA 0 L L L L 1 L LL H 2 L LHL 3 L LH H 4 L HL L 5 L HL H 6 L HH L 7 L HH H 8 H LL L 9 H LL H 10 H LHL 11 H LH H 12 H HL L 13 H HL H 14 H HH L 15 H H H H logic diagram, each counter (positive logic) R T QA CLR CLK R T QB R T QC R T QD |
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