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SN74AS648 датащи(PDF) 11 Page - Texas Instruments |
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SN74AS648 датащи(HTML) 11 Page - Texas Instruments |
11 / 18 page SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F – DECEMBER 1983 – REVISED JANUARY 1995 11 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† UNIT SN54ALS648 SN74ALS648A MIN MAX MIN MAX fmax 35 40 MHz tPLH CLKBA or CLKAB AorB 8 39 7 33 ns tPHL CLKBA or CLKAB A or B 5 23 5 20 ns tPLH AorB BorA 3 20 2 17 ns tPHL A or B B or A 2 12 2 10 ns tPLH SBA or SAB‡ AorB 5 44 5 39 ns tPHL (stored data low) A or B 4 26 4 22 ns tPLH SBA or SAB‡ AorB 6 30 6 25 ns tPHL (stored data high) A or B 6 25 6 21 ns tPZH OE AorB 4 25 2 22 ns tPZL OE A or B 4 25 4 22 ns tPHZ OE AorB 1 12 1 10 ns tPLZ OE A or B 2 21 2 15 ns tPZH DIR AorB 4 35 2 27 ns tPZL DIR A or B 3 25 3 19 ns tPHZ DIR AorB 1 17 1 14 ns tPLZ DIR A or B 2 22 2 15 ns † For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. ‡ These parameters are measured with the internal output state of the storage register opposite that of the bus input. |
Аналогичный номер детали - SN74AS648 |
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Аналогичное описание - SN74AS648 |
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