74HC ICs are high-speed CMOS ICs that merge the low power consumption found in the 4000 series ICs with the better speed found in TTL IC�s. Basically, they are CMOS ICs with the same pin outs as the older 74LS series. The 74HCT series are a little different in that the 74HCT ICs can be mixed with the 74LS series ICs.
74HC139 MM74HC139N Dual 2-to-4 Line Decoder IC Fairchild
Our Price: $1.00
74HC93N 4-bit Binary Ripple Counter CMOS Logic IC NXP
Our Price: $1.00
74HC51N MC74HC51N Dual 2/2 Input AND-NOR Gate Logic CMOS IC Motorola
Our Price: $0.75