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54VCXHR162245 Scheda tecnica(PDF) 5 Page - STMicroelectronics |
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54VCXHR162245 Scheda tecnica(HTML) 5 Page - STMicroelectronics |
5 / 18 page 54VCXHR162245 Pin settings Doc ID 10651 Rev 8 5/18 2.2 Pin description 2.3 Truth table Note: X = Do not care; Z = High impedance Table 1. Pin description Pin n° Symbol Name and function 1 1DIR Directional control 2, 3, 5, 6, 8, 9, 11, 12 1B1 to 1B8 Data inputs/outputs 13, 14, 16, 17, 19, 20, 22, 23 2B1 to 2B8 Data inputs/outputs 24 2DIR Directional control 25 2G Output enable input 36, 35, 33, 32, 30, 29, 27, 26 2A1 to 2A8 Data inputs/outputs 47, 46, 44, 43, 41, 40, 38, 38 1A1 to 1A8 Data inputs/outputs 48 1G Output enable input 4, 10, 15, 21, 28, 34, 39, 45 GND Ground (0 V) 7, 18, 31, 42 VCC Positive supply voltage Table 2. Truth table Inputs Function Output G DIR A bus B bus Yn L L OUTPUT INPUT A = B L H INPUT OUTPUT B = A HX Z Z Z |
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