74HC138集成译码器内部电路图： & Yo & 40巴 & & 72 & Y3 & & Y6 G ' 77 A
74HC138集成译码器内部电路图： G1 A0 A1 A2 1 1 Y 0 Y11Y 2 Y 3 1 1 1 1 &&&&&&&& 111 Y 4 Y 5 Y 6 Y 7 G2 G3 & &&&&&&&&
74HC138集成译码器功能表 输 入 输 出 GI G2 G; A A Ao Yo YI Y2 Ya 74 Ys 76 Y7 × H × × × × H H H H H H H H H × × X H H H H H H H H L × × × X × H H H H H H H H H L L L L L L H H H H H H H H L L L L H H L H H H H H H H L L L H L H H L H H H H H H L L L H H H H H L H H H H H L L H L L H H H H L H H H H L L H L H H H H H H L H H H L L H H L H H H H H H L H H H H H H H H H H H H L A
74HC138集成译码器功能表 G2 G3 Y 0 Y 1 Y 2 Y 3 Y 4 Y 5 Y 6 Y 7 H L L H H H H H H H H H H L H L L H H L H H H H H H L H H L L H L H H H H H H L H H H L L H L L H H H H L H H H H L L L H H H H H L H H H H H L L L H L H H L H H H H H H L L L L H H L H H H H H H H L L L L L L H H H H H H H L × × × × × H H H H H H H H × × H × × × H H H H H H H H × H × × × × H H H H H H H H G1 A2 输 入 输 出 A1 A0