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M74HC139RM13TR Scheda tecnica(PDF) 2 Page - STMicroelectronics |
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M74HC139RM13TR Scheda tecnica(HTML) 2 Page - STMicroelectronics |
2 / 9 page M74HC139 2/9 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE LOGIC DIAGRAM This logic diagram has not be used to estimate propagation delays PIN No SYMBOL NAME AND FUNCTION 1, 15 1G, 2G Enable Inputs 2, 3 1A, 1B Address Inputs 4, 5, 6, 7 1Y0 TO 1Y3 Outputs 12, 11, 10, 9 2Y0 TO 2Y3 Outputs 14, 13 2A, 2B Address Inputs 8 GND Ground (0V) 16 VCC Positive Supply Voltage INPUTS OUTPUTS SELECTED OUTPUT ENABLE SELECT Y0 Y1 Y2 Y3 G BA H X X H H H H NONE L LLL H H H Y0 LL H H L H H Y1 LH L H H L H Y2 L HHHH H L Y3 |
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