型号 厂家 批号 封装    
s-a  s-b  s-c  s-d  s-e  s-f  s-g  s-h  s-i  s-j  s-k  s-l  s-m  s-n  s-o  s-p  s-q  s-r  s-s  s-t  s-u  s-v  s-w  s-x  s-y  s-z  s-0  s-1  s-2  s-3  s-4  s-5  s-6  s-7  s-8  s-9   
 74LS549NS  74LS548NS  74LS547  74LS541NSR  74LS541NS
 74LS541N  74LS541DWR  74LS541DW  74LS541D  74LS541B1
 74LS541AN  74LS541  74LS540PC  74LS540NSR  74LS540N
 74LS540M  74LS540DW  74LS540DC  74LS540D  74LS540
 74LS54  74LS537  74LS534PC  74LS534N  74LS534DC
 74LS534.  74LS534  74LS533WM  74LS533PC  74LS533P
 74LS533N  74LS533DC  74LS533  74LS524  74LS521
 74LS520  74LS51-SMD D/C89  74LS51S  74LS51PC  74LS51P
 74LS51NSR  74LS51N D/C89  74LS51N  74LS51ML1  74LS51M
 74LS51E  74LS51DC  74LS51B1  74LS517  74LS512D
 74LS512  74LS51(SN74LS51N) D/C90  74LS51(SN74LS51N) D/C89  74LS51(SN74LS51N) D/C88  74LS51(M74LS51P) D/C84
 74LS51(HD74LS51P) D/C94  74LS51(HD74LS51P) D/C93  74LS51(HD74LS51P) D/C87  74LS51(GD74LS51) D/C93  74LS51(DN74LS51) D/C89
 74LS51(DN74LS51) D/C88  74LS51  74LS503SC  74LS503PC  74LS502PC
 74LS502DC  74LS502  74LS50  74LS49PC  74LS499
 74LS491NS  74LS491N  74LS491CJ  74LS491ANS  74LS490P
 74LS490N  74LS490M1  74LS490BI  74LS490  74ls49
 74LS48PC  74LS48P  74LS48N  74LS48-E  74LS487
 74LS486  74LS48  74LS47PC  74LS47P  74LS47N
 74LS472  74LS471N  74LS471  74LS47  74LS469ANS
 74LS468N  74LS468DW  74LS468  74LS467N  74LS467DW
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