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54HC244 Datasheet(PDF) 2 Page - Silicon Supplies |
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54HC244 Datasheet(HTML) 2 Page - Silicon Supplies |
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2 / 6 page ![]() Page 2 of 6 www.siliconsupplies.com d High Speed CMOS Logic – 54HC244 Rev 1.1 01/05/18 PAD FUNCTION 1 ENABLE A 2 A1 3 YB4 4 A2 5 YB3 6 A3 7 YB2 8 A4 9 YB1 10 GND 11 B1 12 YA4 13 B2 14 YA3 15 B3 16 YA2 17 B4 18 YA1 19 ENABLE B 20 VCC CONNECT CHIP BACK TO VCC OR FLOAT Pad Layout and Functions Truth Table Logic Diagram INPUTS OUTPUTS ENABLE A ENABLE B A, B YA, YB L L H L H X L H Z H = High level (steady state) L = Low level (steady state) X = Don’t care Z = High impedance Pad 20 = VCC Pad 10 = GND 1900µm (74.80 mils) 0,0 1 20 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 DIE ID |
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