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M54HC251K1 数据表(PDF) 2 Page - STMicroelectronics |
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M54HC251K1 数据表(HTML) 2 Page - STMicroelectronics |
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2 / 10 page  M54HC251 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 4, 3, 2, 1, 15, 14, 13, 12 D0 to D7 Multiplexer Inputs 5 Y Multiplexer Output 6W Complementary Multi- plexer Output 7STROBE 3 State Output Enable Input 11, 10, 9 A, B, C Select Inputs 8 GND Ground (0V) 16 VCC Positive Supply Voltage INPUTS OUTPUTS STROBE YW CBA S XXX HZ Z LLLL D0 D0 L L H L D1 D1 L H L L D2 D2 L H H L D3 D3 H L L L D4 D4 HLHL D5 D5 H H L L D6 D6 HHH L D7 D7 |
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