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SN74LS42 Datasheet(PDF) 4 Page - ON Semiconductor |
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SN74LS42 Datasheet(HTML) 4 Page - ON Semiconductor |
4 / 8 page SN74LS42 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 VO 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 I 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 1) –20 –100 mA VCC = MAX ICC Power Supply Current 13 mA VCC = MAX Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C) Limits Symbol Parameter Min Typ Max Unit Test Conditions tPLH tPHL Propagation Delay (2 Levels) 15 15 25 25 ns Figure 2 VCC = 5.0 V tPLH tPHL Propagation Delay (3 Levels) 20 20 30 30 ns Figure 1 CC CL = 15 pF AC WAVEFORMS VIN VOUT 1.3 V 1.3 V 1.3 V 1.3 V tPHL tPLH Figure 1. Figure 2. 1.3 V 1.3 V 1.3 V 1.3 V tPLH tPHL VIN VOUT |
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