HD74LS74A

Preliminary Datasheet HD74LS74A Dual D-type Positive Edge-triggered Flip-Flops (with Preset and Clear) R04DS0012EJ0400 (Previous: REJ03D0415-0300) Rev.4.00 Dec 21, 2011 Features  Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74LS74AP DILP-14 pin PRDP0014AB-B (DP-14AV) P HD74LS74AFPEL SOP-14 pin (JEITA) PRSP0014DF-B (FP-14DAV) FP HD74LS74ARPEL SOP-14 pin (JEDEC) PRSP0014DE-A (FP-14DNV) RP Note: Please consult the sales office for the above package availability. Taping Abbreviation (Quantity) — EL (2,000 pcs/reel) EL (2,500 pcs/reel) Pin Arrangement 1CLR 1 1D 2 1CK 3 1PR 4 1Q 5 1Q 6 GND 7 CK D PR CLR QQ D CK CLR PR QQ (Top view) 14 VCC 13 2CLR 12 2D 11 2CK 10 2PR 9 2Q 8 2Q Function Table Input Output Preset Clear Clock D Q Q LHXXHL HL XX LH L L X X H* H* HH  HHL HH  L LH H H L X Q0 Q0 H; high level, L; low level, X; irrelevant, ; transition from low to high level, Q0; level of Q before...