4-BIT MAGNITUDE COMPARATOR SN54/74LS85

SN54/74LS85DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)LimitsSymbol Parameter Min Typ Max Unit Test ConditionsiVIH Input HIGH Voltage 2.0 VVILInput LOW Voltage54 0.774 0.8VGuaranteed Input HIGH Voltage forAll InputsGuaranteed Input LOW Voltage forAll InputsVIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = – 18 mAVOHOutput HIGH VoltageVOLOutput LOW Voltage54 25 2.5 35 3.5 V VCC = MIN, IOH = MAX, VIN = VIH74 2.7 3.5 Vor VIL per Truth Table54, 74 0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN,VIN =VIL or VIH74 0.35 0.5 V IOL = 8.0 mA per Truth TableIIHInput HIGH CurrentA < B, A > BOther InputsA < B, A > BOther Inputs20600.10.3µA VCC = MAX, VIN = 2.7 VmAVCC = MAX, VIN = 7.0 VIILInput LOW CurrentA < B, A > BOther Inputs–0.4–1.2IOS Output Short Circuit Current (Note 1) –20 –100 mA VCC = MAXICC Power Supply Current 20 mA VCC = MAXNote 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)LimitsmAVCC = MAX, VIN = 0.4 VSymbol Parameter Min Typ Max Unit Test ConditionsitPLHtPHLAny A or B to A < B, A > B 24203630nstPLHtPHLAny A or B to A = B 27234545nstPLHtPHLA < B or A = B to A > B 14112217nsVCC = 5.0 VCL = 15 pFtPLHtPHLA = B to A = B 13132026nstPLHtPHLA > B or A = B to A < B 14112217nsAC WAVEFORMSVIN1.3 V1.3 VVIN1.3 V1.3 VtPHLtPLHtPHLtPLHVOUT1.3 V 1.3 VVOUT1.3 V 1.3 VFigure 3 Figure 4FAST AND LS TTL DATA5-4