| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | M54HC190 | 4 BIT SYNCHRONOUS UP/DOWN COUNTERS | 306K |
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| 2 | M54HC190B1R | 4 BIT SYNCHRONOUS UP/DOWN COUNTERS | 306K |
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| 3 | M54HC190C1R | 4 BIT SYNCHRONOUS UP/DOWN COUNTERS | 306K |
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| 4 | M54HC190F1R | 4 BIT SYNCHRONOUS UP/DOWN COUNTERS | 306K |
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| 5 | M54HC190M1R | 4 BIT SYNCHRONOUS UP/DOWN COUNTERS | 306K |
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