74LS20 ,Dual 4-Input NAND GateGeneral DescriptionThis device contains two independent gates each of whichperforms the logic NAND ..
74LS221 ,Dual Non-Retriggerable One-Shot with Clear and Complementary OutputsFeaturesThe DM74LS221 is a dual monostable multivibrator with
74LS20
Dual 4-Input NAND Gate
DM74LS20 Dual 4-Input NAND Gate June 1986 Revised March 2000 DM74LS20 Dual 4-Input NAND Gate General Description This device contains two independent gates each of which performs the logic NAND function. Ordering Code: Order Number Package Number Package Description DM74LS20M M14A 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow DM74LS20N N14A 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Y = ABCD Inputs Output AB CD Y XXX L H XX L X H XL X X H L XXX H HH HH L H = HIGH Logic Level L = LOW Logic Level X = Either LOW or HIGH Logic Level © 2000 DS006355
