型号：DM74LS257
厂商：NSC[National Semiconductor]
大小：163.7 Kbytes
页数：共8页
功能：TRI-STATE Quad 2-Data Selectors/Multiplexers
厂商：FAIRCHILD[Fairchild Semiconductor]
大小：56.55 Kbytes
页数：共5页
功能：3-STATE Quad 2-Data Selectors/Multiplexers
型号：DM74LS257B
厂商：TI1[Texas Instruments]
大小：413.55 Kbytes
页数：共10页
功能：TRI-STATE(RM) Quad 2-Data Selectors/Multiplexers
型号：DM74LS257BM
型号：DM74LS257BN
