Introduction - If you have any usage issues, please Google them yourself
The 3-8 decoder: input variables for the three A, B, C, the output variables are eight, i.e. the Y0 ~~ Y7.
G1, G2A, G2B strobe input, only when G1 = 1, G2A = 0, G2b = 0, the decoder can output correctly, otherwise, the decoder output is invalid, the Y0 ~~ Y7 are high "11111111 . "