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SN75ALS171 Datasheet(PDF) 3 Page - Texas Instruments |
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SN75ALS171 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 19 page  SN75ALS171, SN75ALS171A TRIPLE DIFFERENTIAL BUS TRANSCEIVERS SLLS056D – AUGUST 1987 – REVISED SEPTEMBER 1995 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 logic symbol† EN4 5EN3 5EN2 5EN1 G5 9 11 6 8 1 3 18 10 7 2 17 3R 2R 1R RE 3DE 2DE 1DE CDE 1 1 1 3D 2D 1D 3B 3A 2B 2A 1B 1A 13 12 15 14 20 19 1 1 2 2 3 3 4 4 4 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) 1B 1A 20 19 2B 2A 15 14 3B 3A 13 12 17 2 3 18 1 7 8 6 10 11 9 Bus Bus Bus CDE 1DE 1D RE 1R 2DE 2D 3DE 2R 3D 3R schematics of inputs and outputs EQUIVALENT OF EACH INPUT Driver Input: R(eq) = 12 kΩ NOM Enable Inputs: R(eq) = 8 kΩ NOM R(eq) = equivalent resistor TYPICAL OF A AND B I/O PORTS TYPICAL OF RECEIVER OUTPUT 85 Ω NOM Output VCC 1.1 k Ω NOM 3 k Ω NOM 18 k Ω NOM A or B 180 k Ω NOM Connected on A Port VCC R(eq) VCC Input 180 k Ω NOM Connected on B Port |
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