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74LS155 Datasheet(PDF) 4 Page - Motorola, Inc |
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74LS155 Datasheet(HTML) 4 Page - Motorola, Inc |
4 / 6 page 5-265 FAST AND LS TTL DATA SN54/74LS156 GUARANTEED OPERATING RANGES Symbol Parameter Min Typ Max Unit VCC Supply Voltage 54 74 4.5 4.75 5.0 5.0 5.5 5.25 V TA Operating Ambient Temperature Range 54 74 – 55 0 25 25 125 70 °C VOH Output Voltage — High 54, 74 5.5 V IOL Output Current — Low 54 74 4.0 8.0 mA DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified) Symbol Parameter Limits Unit Test Conditions 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 54 0.7 V Guaranteed Input LOW Voltage for All Inputs VIL Input LOW Voltage 74 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 IOH Output HIGH Current 54, 74 100 µA VCC = MIN, VOH = MAX VOL Output LOW Voltage 54, 74 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table VOL Output LOW Voltage 74 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 ICC Power Supply Current 10 mA VCC = MAX AC CHARACTERISTICS (TA = 25°C) Symbol Parameter Limits Unit Test Conditions Symbol Parameter Min Typ Max Unit Test Conditions tPLH tPHL Propagation Delay Address, Ea or Eb to Output 25 34 40 51 ns Figure 1 VCC = 5.0 V CL = 15 pF RL = 2.0 kΩ tPLH tPHL Propagation Delay Address to Output 31 34 46 51 ns Figure 2 VCC = 5.0 V CL = 15 pF RL = 2.0 kΩ tPLH tPHL Propagation Delay Ea to Output 32 32 48 48 ns Figure 1 RL = 2.0 kΩ 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 1.3 V tPLH 1.3 V |
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