| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 74HCT190D | Presettable synchronous BCD decade up/down counter | 104K |
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| 2 | 74HCT190DB | Presettable synchronous BCD decade up/down counter | 104K |
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| 3 | 74HCT190D-T | Asynchronous Up/Down Counter | 240K |
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