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54VCXH162373 Scheda tecnica(PDF) 6 Page - STMicroelectronics |
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54VCXH162373 Scheda tecnica(HTML) 6 Page - STMicroelectronics |
6 / 18 page Pin settings 54VCXH162373 6/18 Doc ID 10653 Rev 7 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 11OE 3 state output enable input (active LOW) 2, 3, 5, 6, 8, 9, 11, 12 1Q0 to 1Q7 3-state outputs 13, 14, 16, 17, 19, 20, 22, 23 2Q0 to 2Q7 3-state outputs 24 2OE 3 state output enable input (active LOW) 25 2LE Latch enable input 36, 35, 33, 32, 30, 29, 27, 26 2D0 to 2D7 Data inputs 47, 46, 44, 43, 41, 40, 38, 37 1D0 to 1D7 Data inputs 48 1LE Latch 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 Output OE LE D Q HX X Z L L X No change (1) 1. Q outputs are latched at the time when the LE input is taken low logic level. LH L L LH H H |
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