SN74HCT240DW1SN74HCT157DRSN74HCT14DRSN74HCT157D¥3.20去看看永恒电子元器件发布了SN74HCT14DR SN74HCT157D SN74HCT157DR SN74HCT240DW1SN74HCT244DWRSN74HCT244DWSN74HCT244N1SN74HCT240N¥3.20去看看永恒电子元器件发布了SN74HCT240N SN74HCT244DW SN74HCT244DWR SN74HCT244N1