54LS20 DM54LS20 DM74LS20 Dual 4-Input NAND Gates June 1989 54LS20 DM54LS20 DM74LS20 Dual 4-Input NAND Gates General Description This device contains two independent gates each of which performs the logic NAND function Features Y Alternate Military Aerospace device (54LS20) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual In Line Package Obsolete Function Table Order Number 54LS20DMQB 54LS20FMQB 54LS20LMQB DM54LS20J DM54LS20W DM74LS20M or DM74LS20N See NS Package Number E20A J14A M14A N14A or W14B TL F 6355 – 1 Y e ABCD Inputs A B CD X X XL X X LX X L XX L X XX H H HH H e High Logic Level L e Low Logic Level X e Eithe...

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