| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | PI74FCT253T | High-Speed CMOS Dual 4-Input Multiplexer | 49K |
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| 2 | PI74FCT253T | High-Speed CMOS Dual 4-Input Multiplexer | 49K |
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| 3 | PI74FCT253TQ | 4-Input Digital Multiplexer | 244K |
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| 4 | PI74FCT253TS | 4-Input Digital Multiplexer | 244K |
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| 5 | PI74FCT253TW | 4-Input Digital Multiplexer | 244K |
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