| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | N74F579D | 8-bit bidirectional binary counter 3-State | 115K |
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| 2 | N74F579DB | Synchronous Up/Down Counter | 584K |
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| 3 | N74F579D-T | Synchronous Up/Down Counter | 584K |
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| 4 | N74F579N | 8-bit bidirectional binary counter 3-State | 115K |
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