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SN74F257NE4 Datasheet(PDF) 4 Page - Texas Instruments |
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SN74F257NE4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 5 page SN54F257, SN74F257 QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SDFS065A − D2932, MARCH 1987 − REVISED OCTOBER 1993 2−4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 switching characteristics (see Note 3) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† UNIT ′F257 SN54F257 SN74F257 MIN TYP MAX MIN MAX MIN MAX tPLH A or B Any Y 2.2 4.1 6 2.2 8 2.2 7 ns tPHL A or B Any Y 1.2 3.8 5.5 1 8 1.2 6.5 ns tPLH A/B Any Y 3.7 9.7 13 3.7 15.5 3.7 15 ns tPHL A/B Any Y 2.7 6.1 8.5 2.7 10.5 2.7 9.5 ns tPZH G Any Y 2.2 5.5 7.5 2.2 9.5 2.2 8.5 ns tPZL G Any Y 2.2 5.1 7.5 2.2 10 2.2 8.5 ns tPHZ G Any Y 1.2 3.9 6 1.2 7 1.2 7 ns tPLZ G Any Y 1.2 4.1 6 1.2 9.5 1.2 7 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 3: Load circuits and waveforms are shown in Section 1. |
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