| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
|---|
| 1 | SN74LS290 | DECADE AND 4-BIT BINARY COUNTERS | 304K |
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| 2 | SN74LS290D | DECADE AND 4-BIT BINARY COUNTERS | 304K |
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| 3 | SN74LS290D | DECADE COUNTER; 4-BIT BINARY COUNTER | 210K |
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| 4 | SN74LS290D | DECADE COUNTER; 4-BIT BINARY COUNTER | 76K |
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| 5 | SN74LS290N | DECADE AND 4-BIT BINARY COUNTERS | 304K |
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| 6 | SN74LS290N | DECADE COUNTER; 4-BIT BINARY COUNTER | 210K |
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| 7 | SN74LS290N | DECADE COUNTER; 4-BIT BINARY COUNTER | 76K |
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