SN74LS196N
SN74LS197
SN74LS197N
SN74LS19AD
SN74LS19ADE4
SN74LS19ADG4
SN74LS19ADR
SN74LS19ADRE4
SN74LS19ADRG4
SN74LS19AN
19129491934(手机优先微信同号)