现货光电SN74LS148NHD74LS145P¥1.40去看看华云芯科技发布了原装现货HD74LS145P SN74LS148N 83AN直插DIP16脚光电耦B集成芯片SN74LS74N适用DIP92¥20去看看光迈数码配件旗舰店发布了光迈适用 SN74LS74N 75/76/78/83/85/86/90/91/92/93/95/96N DIPSN74LS42N芯片139N112¥1.90去看看超姬旗舰店发布了DIP-16直插芯片SN74LS42N 47 48 76 83 85 109 112 123 138 139N