74LS540 OCTAL BUFFER / LINE DRIVER 3-STATE INVERTING
74LS541 OCTAL BUFFER / LINE DRIVER - 3-STATE OUTPUT
74LS595 8-BIT SHIFT REGISTER WITH OUTPUT LATCHES 3-STATE
74LS621 OCTAL BUS TRANSCEIVER - OPEN COLLECTOR
74LS623 OCTAL BUS TRANSCEIVER 3-STATE
74LS641 OCTAL BUS TRANSCEIVER OPEN COLLECTOR
74LS642 OCTAL BUS TRANSCEIVER OPEN COLLECTOR
74LS645 OCTAL BUS TRANSCEIVER