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SN74ALS638A Scheda tecnica(PDF) 2 Page - Texas Instruments |
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SN74ALS638A Scheda tecnica(HTML) 2 Page - Texas Instruments |
2 / 7 page SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639 OCTAL BUS TRANSCEIVERS SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 logic symbols† B2 17 B3 16 B4 15 A5 6 A6 7 A7 8 A8 9 A2 3 A3 4 A4 5 OE A1 2 G3 19 3 EN2 [AB] B5 14 B6 13 B7 12 B8 11 B1 18 3 EN1 [BA] 1 DIR 1 2 B2 17 B3 16 B4 15 A5 6 A6 7 A7 8 A8 9 A2 3 A3 4 A4 5 OE A1 2 G3 19 3 EN2 [AB] B5 14 B6 13 B7 12 B8 11 B1 18 3 EN1 [BA] 1 DIR 1 2 SN74ALS638A, SN74AS638A SN74ALS639A, SN74AS639 † These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagrams (positive logic) SN74ALS638A, SN74AS638A SN74ALS639A, SN74AS639 To Seven Other Transceivers OE A1 DIR B1 19 2 1 18 To Seven Other Transceivers OE A1 DIR B1 19 2 1 18 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI: All inputs 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-bus I/O ports 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-bus I/O ports 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN74ALS638A, SN74ALS639A 0 °C to 70°C . . . . . . . . . . . . . . . . . Storage temperature range – 65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. |
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