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SN74ALS253DR 데이터시트(PDF) 4 Page - Texas Instruments |
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SN74ALS253DR 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 18 page SN54ALS253, SN74ALS253, SN74AS253A DUAL 1OF4 DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SDAS216A − 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) SN54ALS253 SN74ALS253 MIN MAX MIN MAX tPLH A or B Any Y 5 30 5 21 ns tPHL A or B Any Y 5 27 5 21 ns tPLH Data Any Y 2 15 2 10 ns tPHL Data (any C) Any Y 3 18 3 14 ns tPZH OE Any Y 3 20 3 14 ns tPZL OE Any Y 2 19 4 16 ns tPHZ OE Any Y 2 12 2 10 ns tPLZ OE Any Y 2 18 2 14 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN74AS253A 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range −65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. recommended operating conditions SN74AS253A UNIT MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 V VIH High-level input voltage 2 V VIL Low-level input voltage 0.8 V IOH High-level output current −15 mA IOL Low-level output current 48 mA TA Operating free-air temperature 0 70 °C |
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