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SN74ALS642A Scheda tecnica(PDF) 3 Page - Texas Instruments |
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SN74ALS642A Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 18 page SN74ALS641A, SN74ALS642A, SN74AS641 OCTAL BUS TRANSCEIVERS WITH OPENCOLLECTOR OUTPUTS SDAS300 − MARCH 1995 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 logic diagrams (positive logic) SN74ALS641A, SN74AS641 A1 B1 19 1 18 2 OE DIR To Seven Other Transceivers SN74ALS642A A1 B1 19 1 18 2 OE DIR To Seven Other Transceivers absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI: All inputs and I/O ports 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN74ALS641A, SN74ALS642A 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. recommended operating conditions SN74ALS641A SN74ALS642A UNIT MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 V VIH High-level input voltage 2 V VIL Low-level input voltage 0.8 V VOH High-level output voltage 5.5 V IOL Low-level output current 24 mA IOL Low-level output current 48‡ mA TA Operating free-air temperature 0 70 °C ‡ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V |
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