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SN74ALS257ANE4 Datasheet(PDF) 7 Page - Texas Instruments |
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SN74ALS257ANE4 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 20 page SN54ALS257A, SN54ALS258A, SN74ALS257A, SN74ALS258A, SN74AS257, SN74AS258 QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SDAS124C − APRIL 1982 − REVISED AUGUST 1996 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 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 (INPUT) (OUTPUT) SN74AS257 MIN MAX tPLH A or B Any Y 1 5.5 ns tPHL A or B Any Y 1 6 ns tPLH A /B Any Y 2 11 ns tPHL A /B Any Y 2 10 ns tPZH OE Any Y 2 7.5 ns tPZL OE Any Y 2 9.5 ns tPHZ OE Any Y 1.5 6.5 ns tPLZ OE Any Y 2 7 ns 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 (INPUT) (OUTPUT) SN74AS258 MIN MAX tPLH A or B Any Y 1 5 ns tPHL A or B Any Y 1 4 ns tPLH A /B Any Y 2 9.5 ns tPHL A /B Any Y 2 10 ns tPZH OE Any Y 2 8 ns tPZL OE Any Y 2 10 ns tPHZ OE Any Y 1.5 6 ns tPLZ OE Any Y 2 6.5 ns † For conditions shown MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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