以下是MB74LS251可替换型号:
- 74LS251DC
- 74LS251PC
- C74LS251P
- DM74LS251N
- ECG74LS251
- HD74LS251
- HD74LS251P
- HEPC74LS251P
- M74LS251P
- MB74LS251
- MB74LS251M
- N74LS251AF
- N74LS251AN
- NTE74LS251
- SK1919
- SN74LS251
- SN74LS25U
- SN74LS251JD
- SN74LS251JDS
- SN74LS25US
- SN74LS251N
- SN74LS251ND
- SN74LS251NDS
- SN74LS251NS
- SN74LS251X
- TCG74LS251
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