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SN74LS138N Fiches technique(PDF) 4 Page - ON Semiconductor |
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SN74LS138N Fiches technique(HTML) 4 Page - ON Semiconductor |
4 / 8 page SN74LS138 http://onsemi.com 4 DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Limits Symbol Parameter Min Typ Max Unit Test Conditions VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for All Inputs VIL Input LOW Voltage 0.8 V Guaranteed Input LOW Voltage for All Inputs VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA VOH Output HIGH Voltage 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH or VIL per Truth Table VOL Output LOW Voltage 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN, VIN VIL or VIH VOL Output LOW Voltage 0.35 0.5 V IOL = 8.0 mA VIN = VIL or VIH per Truth Table IIH Input HIGH Current 20 µA VCC = MAX, VIN = 2.7 V IIH Input HIGH Current 0.1 mA VCC = MAX, VIN = 7.0 V IIL Input LOW Current –0.4 mA VCC = MAX, VIN = 0.4 V IOS Short Circuit Current (Note 2) –20 –100 mA VCC = MAX ICC Power Supply Current 10 mA VCC = MAX 2. Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Levels of Limits Symbol Parameter Levels of Delay Min Typ Max Unit Test Conditions tPLH tPHL Propagation Delay Address to Output 2 2 13 27 20 41 ns tPLH tPHL Propagation Delay Address to Output 3 3 18 26 27 39 ns VCC = 5.0 V tPLH tPHL Propagation Delay E1 or E2 Enable to Output 2 2 12 21 18 32 ns VCC = 5.0 V CL = 15 pF tPLH tPHL Propagation Delay E3 Enable to Output 3 3 17 25 26 38 ns AC WAVEFORMS Figure 1. Figure 2. VIN VOUT 1.3 V tPHL 1.3 V 1.3 V 1.3 V tPLH VIN VOUT 1.3 V tPHL 1.3 V tPLH 1.3 V 1.3 V |
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Description similaire - SN74LS138N |
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