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SN74AS138NSRG4 Scheda tecnica(PDF) 4 Page - Texas Instruments |
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SN74AS138NSRG4 Scheda tecnica(HTML) 4 Page - Texas Instruments |
4 / 19 page SN54ALS138A, SN54AS138, SN74ALS138A, SN74AS138 3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS SDAS055E – APRIL 1982 – REVISED JULY 1996 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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: SN54ALS138A – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74ALS138A 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –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 SN54ALS138A SN74ALS138A UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.7 0.8 V IOH High-level output current – 0.4 – 0.4 mA IOL Low-level output current 4 8 mA TA Operating free-air temperature –55 125 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS138A SN74ALS138A UNIT PARAMETER TEST CONDITIONS MIN TYP‡ MAX MIN TYP‡ MAX UNIT VIK VCC = 4.5 V, II = – 18 mA – 1.5 – 1.5 V VOH VCC = 4.5 V, IOH = – 0.4 mA VCC –2 VCC –2 V VOL VCC =4 5V IOL = 4 mA 0.25 0.4 0.25 0.4 V VOL VCC = 4.5 V IOL = 8 mA 0.35 0.5 V II VCC = 5.5 V, VI = 7 V 0.1 0.1 mA IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA IIL VCC = 5.5 V, VI = 0.4 V – 0.1 – 0.1 mA IO§ VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA ICC VCC = 5.5 V 5 10 5 10 mA ‡ 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, RL = 500 Ω, TA = MIN to MAX¶ UNIT (INPUT) (OUTPUT) SN54ALS138A SN74ALS138A MIN MAX MIN MAX tPLH ABC Any Y 2 28 5 22 ns tPHL A, B, C Any Y 6 22 6 18 ns tPLH GorG Any Y 2 22 3 17 ns tPHL G or G Any Y 4 21 4 17 ns ¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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