SN74HC4002DR
SN74HC4002N
SN74HC4020ADB
SN74HC4020ADBE4
SN74HC4020ADBG4
SN74HC4020AN
SN74HC4020ANE4
SN74HC4020ANS
SN74HC4020ANSE4
SN74HC4020ANSG4
19129491934(手机优先微信同号)