HD74LS279

HD74LS279 Quadruple S-R Latches Features Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation HD74LS279P DILP-16 pin PRDP0016AE-B (DP-16FV) P HD74LS279FPEL SOP-16 pin (JEITA) PRSP0016DH-B (FP-16DAV) FP Note: Please consult the sales office for the above package availability. Pin Arrangement REJ03D0474-0400 Rev.4.00 May 10, 2006 Taping Abbreviation (Quantity) — EL (2,000 pcs/reel) 1R 1 1S1 2 1S2 3 1Q 4 2R 5 2S 6 2Q 7 GND 8 16 VCC 15 4S 14 4R 13 4Q 12 3S2 11 3S1 10 3R 9 3Q (Top view) Rev.4.00, May 10, 2006, page 1 of 4 HD74LS279 Function Table Inputs Output S** R Q H H Q0 L HH HLL L L H* Notes: 1. H; high level, L; low level 2. Q0; The level of Q before the indidicated input conditions were established. 3. *; This output level is psodo stable; that is it may not persist when S and R inputs return to their inactive (high) level. 4. **; For latches with double S inputs; H; both S inputs high, L; one or both S i...