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SN74AS648 Arkusz danych(PDF) 9 Page - Texas Instruments |
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SN74AS648 Arkusz danych(HTML) 9 Page - Texas Instruments |
9 / 27 page SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F – DECEMBER 1983 – REVISED JANUARY 1995 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI: Control inputs 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I / O ports 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN54ALS648 – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74ALS648A 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 SN54ALS648 SN74ALS648A UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.7 0.8 V IOH High-level output current –12 –15 mA IOL Low-level output current 12 24 mA fclock Clock frequency 0 35 0 40 MHz tw Pulse duration, CLKBA or CLKAB high or low 14.5 12.5 ns tsu Setup time, A before CLKAB ↑ or B before CLKBA↑ 15 10 ns th Hold time, A after CLKAB ↑ or B after CLKBA↑ 0 0 ns TA Operating free-air temperature –55 125 0 70 °C |
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