| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | MM54C193 | Synchronous 4-Bit Up/Down Decade Counter | 143K |
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| 2 | MM54C193 | Synchronous 4-Bit Up/Down Decade Counter | 143K |
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| 3 | MM54C193J | Synchronous 4-Bit Up/Down Decade Counter | 143K |
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| 4 | MM54C193J | Synchronous 4-Bit Up/Down Decade Counter | 143K |
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| 5 | MM54C193N | Synchronous 4-Bit Up/Down Decade Counter | 143K |
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| 6 | MM54C193N | Synchronous 4-Bit Up/Down Decade Counter | 143K |
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