| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 74HCT193D | Presettable synchronous 4-bit binary up/down counter | 98K |
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| 2 | 74HCT193D | Presettable synchronous 4-bit binary up/down counter | 161K |
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| 3 | 74HCT193DB | Presettable synchronous 4-bit binary up/down counter | 161K |
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| 4 | 74HCT193D-T | Synchronous Up/Down Counter | 222K |
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