| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
|---|
| 1 | SN74LS191N | SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL | 524K |
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| 2 | SN74LS191N | PRESETTABLE BCD/DECADE UP/DOWN COUNTERS PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS | 317K |
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| 3 | SN74LS191NDS | Synchronous Up/Down Counter | 197K |
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