| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | 54F191FM | Up/Down Binary Counter with Preset and Ripple Clock | 201K |
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| 2 | 54F191FMQB | Synchronous Up/Down Counter | 197K |
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| 3 | 54F191FMQB | Up/Down Binary Counter with Preset and Ripple Clock | 179K |
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| 4 | 54F191FMX | Up/Down Binary Counter with Preset and Ripple Clock | 179K |
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