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1 SN74LS640DW OCTAL BUS TRANSCEIVERS 344K TI 4145042
2 SN74LS640DW OCTAL BUS TRANSCEIVERS 121K MOTOROLA 4145041
3 SN74LS640DW LOW POWER SCHOTTKY 144K ON 4145040
4 SN74LS640DW OCTAL BUS TRANSCEIVRS 1163K TI 2025265
5 SN74LS640DWE4 OCTAL BUS TRANSCEIVRS 1163K TI 2025264
6 SN74LS640DWG4 OCTAL BUS TRANSCEIVRS 1163K TI 2025263
7 SN74LS640DWR OCTAL BUS TRANSCEIVRS 1163K TI 2025262
8 SN74LS640DWRE4 OCTAL BUS TRANSCEIVRS 1163K TI 2025261
9 SN74LS640DWRG4 OCTAL BUS TRANSCEIVRS 1163K TI 2025260