| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 54F579 | 8-Bit Bidirectional Binary Counter with TRI-STATE Outputs | 201K |
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| 2 | 54F579/BSA | Synchronous Up/Down Counter | 407K |
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| 3 | 54F579DM | Synchronous Up/Down Counter | 106K |
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| 4 | 54F579FM | Synchronous Up/Down Counter | 106K |
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| 5 | 54F579LM | Synchronous Up/Down Counter | 106K |
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