Date: 20011230 From: Jim Delaney To: Jaap van Ganswijk Subject: Chipdir addition ... addition = /E 1 20 Vcc P0 2 19 /P=Q Q0 3 18 Q7 P1 4 17 P7 Q1 5 16 Q6 P2 6 15 P6 Q2 7 x688 14 Q5 P3 8 13 P5 Q3 9 12 Q4 GND 10 11 P4 x688 = 74LS688, 74HCT688 ect, ect for all other 74 logic series. / = denotes active low. Functional Description ---------------------- /P=Q is the output that swings low, when all 8 bits of P = all 8 bits of Q. used for address decoding mostly in I/O applications.