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SN54ALS253 Fiches technique(PDF) 5 Page - Texas Instruments |
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SN54ALS253 Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 7 page SN54ALS253, SN74ALS253, SN74AS253A DUAL 1-OF-4 DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS SDAS216A – APRIL 1982 – REVISED DECEMBER 1994 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN74AS253A UNIT PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VIK VCC = 4.5 V, II = – 18 mA – 1.2 V VOH VCC = 4.5 V to 5.5 V, IOH = – 2 mA VCC –2 V VOH VCC = 4.5 V, IOH = – 15 mA 2.4 3.2 V VOL VCC = 4.5 V, IOL = 48 mA 0.35 0.5 V IOZH VCC = 5.5 V, VO = 2.7 V 50 µA IOZL VCC = 5.5 V, VO = 0.4 V –50 µA II A, B VCC =5 5V VI =7V 0.2 mA II All others VCC = 5.5 V, VI = 7 V 0.1 mA IIH A, B VCC =5 5V VI =2 7V 40 µA IIH All others VCC = 5.5 V, VI = 2.7 V 20 µA IIL A, B VCC =5 5V VI =0 4V –1 mA IIL All others VCC = 5.5 V, VI = 0.4 V – 0.5 mA IO‡ VCC = 5.5 V, VO = 2.25 V –30 –112 mA Outputs high 18 29 ICC VCC = 5.5 V Outputs low 20 32 mA Outputs disabled 21 33 † All typical values are at VCC = 5 V, TA = 25°C. ‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. 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 SN74AS253A MIN MAX tPLH AorB Y 3 13.5 ns tPHL A or B Y 3 11.5 ns tPLH Data Y 2.5 7.5 ns tPHL (any C) Y 2.5 8 ns tPZH OE Any Y 2 12.5 ns tPZL OE Any Y 2.5 11.5 ns tPHZ OE Any Y 1 6 ns tPLZ OE Any Y 1 7 ns § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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