| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | IDT74FCT521BD | FAST CMOS 8-BIT IDENTITY COMPARATOR | 104K |
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| 2 | IDT74FCT521BDB | FAST CMOS 8-BIT IDENTITY COMPARATOR | 104K |
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| 3 | IDT74FCT521BDB | FAST CMOS 8-BIT IDENTITY COMPARATOR | 149K |
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