| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | SN74LS640DW | OCTAL BUS TRANSCEIVERS | 344K |
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| 2 | SN74LS640DW | OCTAL BUS TRANSCEIVERS | 121K |
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| 3 | SN74LS640DW | LOW POWER SCHOTTKY | 144K |
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| 4 | SN74LS640DW | OCTAL BUS TRANSCEIVRS | 1163K |
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| 5 | SN74LS640DWE4 | OCTAL BUS TRANSCEIVRS | 1163K |
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| 6 | SN74LS640DWG4 | OCTAL BUS TRANSCEIVRS | 1163K |
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| 7 | SN74LS640DWR | OCTAL BUS TRANSCEIVRS | 1163K |
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| 8 | SN74LS640DWRE4 | OCTAL BUS TRANSCEIVRS | 1163K |
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| 9 | SN74LS640DWRG4 | OCTAL BUS TRANSCEIVRS | 1163K |
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