| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
|---|
| 1 | DM74LS290 | 4-BIR DECADE COUNTER | 108K |
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| 2 | DM74LS290J/A+ | Asynchronous Up Counter | 109K |
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| 3 | DM74LS290M | 4-BIR DECADE COUNTER | 108K |
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| 4 | DM74LS290N | 4-BIR DECADE COUNTER | 108K |
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| 5 | DM74LS290N/A+ | Asynchronous Up Counter | 109K |
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| 6 | DM74LS290N/B+ | Asynchronous Up Counter | 109K |
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