SN74HC645N
SN74HC645NE4
SN74HC645NS
SN74HC645NSE4
SN74HC645NSG4
SN74HC645NSR
SN74HC645NSRE4
SN74HC645NSRG4
SN74HC646DW
SN74HC646DWE4
19129491934(手机优先微信同号)