| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | CD54ACT257F | Logic IC | 475K |
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| 2 | CD54ACT257F3A | LOGIC MUX|QUAD|2-INPUT|ACT-CMOS|DIP|16PIN|CERAMIC | 42K |
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| 3 | CD54ACT257F3A | Quad 2-Input Multiplexer with Three-State Outputs | 294K |
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| 4 | CD54ACT257F3A | Quad 2-Input Multiplexer with Three-State Outputs | 466K |
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| 5 | CD54ACT257F3A | Quad 2-Input Multiplexer with Three-State Outputs | 496K |
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