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M54HC138 데이터시트(PDF) 2 Page - STMicroelectronics |
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M54HC138 데이터시트(HTML) 2 Page - STMicroelectronics |
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2 / 9 page ![]() M54HC138 2/9 IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE X : Don’t Care PIN N° SYMBOL NAME AND FUNCTION 1, 2, 3 A, B, C Address Inputs 4, 5 G2A,G2B Enable Inputs 6 G1 Enable Input 9, 10, 11, 12, 13, 14, 15, 7 Y0 to Y7 Data Outputs 8 GND Ground (0V) 16 VCC Positive Supply Voltage INPUTS OUTPUTS ENABLE SELECT G2B G2A G1 CBA Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X L X X X HHHHHHHH X H XXXX HHHHHHHH H XXXXX HHHHHHHH L L H L L L L 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 H HH 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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