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SN54LS620, SN54LS621, SN74LS620, SN74LS621, SN74LS623 OCTAL BUS TRANSCEIVERS
D 2 5 3 7 , A U G U S T 1 9 7 9 - R E V IS E D M A R C H 1 9 8 8
Bidirectional Bus Transceivers in High-Density 20-Pin
