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74LCX138 数据表(PDF) 5 Page - STMicroelectronics |
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74LCX138 数据表(HTML) 5 Page - STMicroelectronics |
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5 / 17 page ![]() 74LCX138 Pin settings 5/17 2.3 Truth table Note: X : Do not care 2.4 Logic diagram Figure 4. Logic diagram Note: This logic diagram has not to be used to estimate propagation delays Table 2. Truth table Inputs Outputs Enable Select G2B G2A G1 C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X L X X X HHHHHHHH X H XXXX HHHHHHHH H XXXXX HHHHHHHH LL H LLLL HHHHHHH L L H L L H H L HHHHHH L L H L H L HH L HHHHH L L H L HH HHH L HHHH L L HH L L HHHH L HHH L L HH L H HHHHH L H H L L HHH L HHHHHH L H L L HHHH HHHHHHH L |
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