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M54HC240D 数据表(PDF) 2 Page - STMicroelectronics |
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M54HC240D 数据表(HTML) 2 Page - STMicroelectronics |
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2 / 10 page  M54HC240 2/10 IEC LOGIC SYMBOLS INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE X : Don’t Care Z : High Impedance PIN N° SYMBOL NAME AND FUNCTION 11G Output Enable Input 2, 4, 6, 8 1A1 to 1A4 Data Inputs 9, 7, 5, 3 2Y1 to 2Y4 Data Outputs 11, 13, 15, 17 2A1 to 2A4 Data Inputs 18, 16, 14, 12 1Y1 to 1Y4 Data Outputs 19 2G Output Enable Input 10 GND Ground (0V) 20 VCC Positive Supply Voltage INPUTS OUTPUT G An Yn LL H LHL HX Z |
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