| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | CY74FCT191T | Presettable Synchronous 4-Bit Up/Down Binary Counters | 125K |
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| 2 | CY74FCT191T | 4-Bit Up/Down Binary Counter | 65K |
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| 3 | CY74FCT191TQSOP | 4-Bit Up/Down Binary Counter | 65K |
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| 4 | CY74FCT191TSOIC | 4-Bit Up/Down Binary Counter | 65K |
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