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SN74LS122 SN74LS123 http://onsemi.com 5 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 LS122 11 mA VCC = MAX ICC Power Supply Current LS123 20 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, VCC = 5.0 V) Limits Symbol Parameter Min Typ Max Unit Test Conditions tPLH Propagation Delay, A to Q 23 33 ns PLH tPHL gy Propagation Delay, A to Q 32 45 ns Cext = 0 tPLH Propagation Delay, B to Q 23 44 ns ext CL = 15 pF PLH tPHL gy Propagation Delay, B to Q 34 56 ns Rext = 5.0 kΩ tPLH Propagation Delay, Clear to Q 28 45 ns ext RL = 2.0 kΩ PLH tPHL gy Propagation Delay, Clear to Q 20 27 ns tWmin A or B to Q 116 200 ns Cext = 1000 pF, Rext = 10 kΩ, tWQ A to B to Q 4.0 4.5 5.0 µs ext ext CL = 15 pF, RL = 2.0 kΩ AC SETUP REQUIREMENTS (TA = 25°C, VCC = 5.0 V) Limits Symbol Parameter Min Typ Max Unit Test Conditions tW Pulse Width 40 ns |
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