This part is a kind of semiconductor called 5420.

Function of this product has Dual 4-Input NAND Gates.

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

5420 DM5420 DM7420 Dual 4-Input NAND Gates June 1989 5420 DM5420 DM7420 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 (5420) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package TL F 6506 – 1 Order Number 5420DMQB 5420FMQB DM5420J DM5420W or DM7420N See NS Package Number J14A N14A or W14B Function Table Y e ABCD Inputs A X X X L H B X X L X H C X L X X H D L X X X H Output Y H H H H L H e High Logic Level L e Low Logic Level X e Either Low or High Logic Level C1995 National Semiconductor Corporation TL F 6506 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Not [ ... ]

5420 PDF Datasheet Download