| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | CY7C421-40JC | x9 Asynchronous FIFO | 676K |
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| 2 | CY7C421-40JC | 256/512/1K/2K/4K x 9 Asynchronous FIFO | 535K |
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| 3 | CY7C421-40JC | 256/512/1K/2K/4K x 9 Asynchronous FIFO | 490K |
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| 4 | CY7C421-40JC | 256/512/1K/2K/4K x 9 Asynchronous FIFO | 636K |
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| 5 | CY7C421-40JCT | x9 Asynchronous FIFO | 676K |
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