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SN74AHC74QDRG4Q1 Scheda tecnica(PDF) 2 Page - Texas Instruments |
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SN74AHC74QDRG4Q1 Scheda tecnica(HTML) 2 Page - Texas Instruments |
2 / 11 page SN74AHC74QQ1 DUAL POSITIVEEDGETRIGGERED DTYPE FLIPFLOP WITH CLEAR AND PRESET SGDS020A − FEBRUARY 2002 − REVISED APRIL 2008 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 FUNCTION TABLE (each flip-flop) INPUTS OUTPUTS PRE CLR CLK D Q Q L H X X H L H LX XL H L LX X H† H† H H ↑ HH L H H ↑ LL H H H L X Q0 Q0 † This configuration is nonstable; that is, it does not persist when PRE or CLR returns to its inactive (high) level. logic symbol‡ S 4 3 1CLK 1D 2 1D R 1 1Q 5 6 C1 10 11 2CLK 12 2D 13 2Q 9 8 1PRE 2PRE 1CLR 2CLR 1Q 2Q ‡ This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram, each flip-flop (positive logic) TG C C TG C C TG C C C TG C C PRE CLK D CLR Q Q C |
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