74LVX257MTR
74LVX257TTR
74LVX273M
74LVX273M_Q
74LVX273MTC
74LVX273MTC_Q
74LVX273MTCX
74LVX273MTCX_NL
74LVX273MTCXTSSOP
74LVX273MTR
19129491934(手机优先微信同号)