| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
|---|
| 1 | 74LS190 | Synchronous Up/Down Decade Counters(single clock line) | 106K |
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| 2 | 74LS190 | SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL | 524K |
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| 3 | 74LS190 | PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS | 317K |
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| 4 | 74LS190PC | Synchronous Up/Down Counter | 131K |
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