以下是M74LS643-1P可替换型号:
- ECG74LS643
- M74LS643-1P
- MB74LS643
- MB74LS643M
- NTE74LS643
- SN74LS643
- SN74LS643J
- SN74LS643JD
- SN74LS643JDS
- SN74LS643JS
- SN74LS643N
- SN74LS643ND
- SN74LS643NDS
- SN74LS643NS
- TCG74LS643
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