MM74HCT244MTCXMM74HCT244MTCMM74HCT240WMXMM74HCT244W¥30去看看永恒电子元器件发布了原MM74HCT240WMX MM74HCT244MTC MM74HCT244MTCX MM74HCT244W直拍保质SN74LS273NSMM74HC373W¥0.50去看看深圳合兴电子发布了74HCT244D SN74LS273NS 74HC374D SN75185D MM74HC373W保质直拍赞