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SN74ALS640B 데이터시트(PDF) 5 Page - Texas Instruments |
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SN74ALS640B 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 7 page SN54ALS640B, SN54AS640, SN74ALS640B, SN74AS640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS122A – DECEMBER 1983 – REVISED JANUARY 1995 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics (see Figure 1) 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 SN54AS640 SN74AS640 MIN MAX MIN MAX tPLH AorB BorA 1 8 2 7 ns tPHL A or B B or A 1 7 2 6 ns tPZH OE AorB 2 10 2 8 ns tPZL OE A or B 2 12 2 10 ns tPHZ OE AorB 2 9 2 8 ns tPLZ OE A or B 2 16 2 13 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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