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SN74ALS251DE4 Datasheet(PDF) 4 Page - Texas Instruments |
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SN74ALS251DE4 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 18 page SN54ALS251, SN74ALS251 1OF8 DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SDAS215A − APRIL 1982 − REVISED DECEMBER 1994 4 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) SN54ALS251 SN74ALS251 MIN MAX MIN MAX tPLH A, B, or C Y 1 21 5 18 ns tPHL A, B, or C Y 7 34 8 24 ns tPLH A, B, or C W 5 38 8 24 ns tPHL A, B, or C W 7 26 7 23 ns tPLH Any D Y 2 15 2 10 ns tPHL Any D Y 3 23 3 15 ns tPLH Any D W 3 25 3 15 ns tPHL Any D W 3 20 3 15 ns tPZH OE Y 3 21 3 15 ns tPZL OE Y 3 19 3 15 ns tPZH OE W 3 21 3 15 ns tPZL OE W 3 19 3 15 ns tPZH OE Y 2 12 2 10 ns tPZL OE Y 1 18 1 10 ns tPZH OE W 2 12 2 10 ns tPZL OE W 1 18 1 10 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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