| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | SN74LS90DR | DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS | 451K |
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| 2 | SN74LS90DR | DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS | 966K |
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| 3 | SN74LS90DR | DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS | 450K |
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| 4 | SN74LS90DRE4 | DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS | 966K |
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| 5 | SN74LS90DRG4 | DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS | 966K |
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