MC14022BDG ON Semiconductor

MC14022B Octal Counter The MC14022B is a fourstage Johnson octal counter with builtin code converter. Highspeed operation and spikefree outputs are obtained by use of a Johnson octal counter design. The eight decoded outputs are normally low, and go high only at their appropriate octal time period. The output changes occur on the positivegoing edge of MC14022B BLOCK DIAGRAM Q0 2 CLOCK 14 Q1 1 Q2 3 Q3 7 CLOCK 13 Q4 11 ENABLE Q5 4 Q6 5 Q7 10 RESET 15 C 12 out V = PIN 16 DD V = PIN 8 SS NC = PIN 6, 9 FUNCTIONAL TRUTH TABLE (Positive Logic) Clock Clock Enable Reset Output=n 0X 0 n X1 0 n 0 0 n+1 X0 n 1 0 n+1 X0 n XX 1 Q0 X = Dont Care. If n < 4 Carry = 1, Otherwise = 0. LOGIC DIAGRAM 11 1 5 7 Q4 Q1 Q6 Q3 CLOCK 14 CARRY 13 C C C C CLOCK Q Q Q Q V 12 DD C C C C ENABLE Q Q Q Q D D D D R R R R V SS 15 RESET Q0 Q5 Q2 Q7 24 3 10