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SN54LS640 Datasheet(PDF) 2 Page - Motorola, Inc |
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SN54LS640 Datasheet(HTML) 2 Page - Motorola, Inc |
2 / 3 page 5-2 FAST AND LS TTL DATA SN54/74LS640 • SN54/74LS645 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 IOH Output Current — High 54, 74 – 3.0 mA OH 54 74 –12 –15 mA IOL Output Current — Low 54 74 12 24 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 0.5 V Guaranteed Input LOW Voltage for VIL Input LOW Voltage 74 0.6 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 54, 74 2.4 3.4 V VCC = MIN, IOH = 3.0 mA VOH Output HIGH Voltage 54, 74 2.0 V VCC = MIN, IOH = MAX VOL Output LOW Voltage 54, 74 0.25 0.4 V IOL = 12 mA VCC = VCC MIN, VIN = VIL or VIH per Truth Table VOL Output LOW Voltage 74 0.35 0.5 V IOL = 24 mA VIN = VIL or VIH per Truth Table IOZH Output Off Current HIGH 20 µA VCC = MAX, VOUT = 2.7 V IOZL Output Off Current LOW – 400 µA VCC = MAX, VOUT = 0.4 V IIH Input HIGH Current A or B, DIR or G 20 µA VCC = MAX, VIN = 2.7 V IIH Input HIGH Current DIR or G 0.1 mA VCC = MAX, VIN = 7.0 V IH A or B 0.1 mA VCC = MAX, VIN = 5.5 V IIL Input LOW Current – 0.4 mA VCC = MAX, VIN = 0.4 V IOS Output Short Circuit Current (Note 1) – 40 – 225 mA VCC = MAX ICC Power Supply Current Total Output HIGH 70 mA VCC = MAX ICC Total, Output LOW 90 mA VCC = MAX Total at HIGH Z 95 Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V) Symbol Parameter Limits Unit Test Conditions Symbol Parameter LS640 LS645 Unit Test Conditions Symbol Parameter Min Typ Max Min Typ Max Unit Test Conditions tPLH tPHL Propagation Delay A to B 6.0 8.0 10 15 8.0 11 15 15 ns CL = 45 pF, RL = 667 Ω tPLH tPHL Propagation Delay B to A 6.0 8.0 10 15 8.0 11 15 15 ns CL = 45 pF, RL = 667 Ω tPZL tPZH Output Enable Time G, DIR to A 31 23 40 40 31 26 40 40 ns CL = 45 pF, RL = 667 Ω tPZL tPZH Output Enable Time G, DIR to B 31 23 40 40 31 26 40 40 ns tPLZ tPHZ Output Disable Time G, DIR to A 15 15 25 25 15 15 25 25 ns CL = 5.0 pF tPLZ tPHZ Output Disable Time G, DIR to B 15 15 25 25 15 15 25 25 ns CL = 5.0 pF |
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