DM74LS244 Octal 3-STATE Buffer/Line Driver/Line Receiver

DM74LS244Absolute Maximum Ratings(Note 1)Supply Voltage7VInput Voltage7VOperating Free Air Temperature Range 0°C to +70°CStorage Temperature Range−65°C to +150°CNote 1: The “Absolute Maximum Ratings” are those values beyond whichthe safety of the device cannot be guaranteed. The device should not beoperated at these limits. The parametric values defined in the ElectricalCharacteristics tables are not guaranteed at the absolute maximum ratings.The “Recommended Operating Conditions” table will define the conditionsfor actual device operation.Recommended Operating ConditionsSymbol Parameter Min Nom Max UnitsV CC Supply Voltage 4.75 5 5.25 VV IH HIGH Level Input Voltage 2 VV IL LOW Level Input Voltage 0.8 VI OH HIGH Level Output Current −15 mAI OL LOW Level Output Current 24 mAT A Free Air Operating Temperature 0 70 °CElectrical Characteristicsover recommended operating free air temperature range (unless otherwise noted)Symbol Parameter ConditionsMin Typ Max(Note 2)UnitsV I Input Clamp Voltage V CC = Min, I I = −18 mA −1.5 VHYS Hysteresis (V T+ − V T− ) V CC = Min 0.2 0.4 VData Inputs OnlyV OH HIGH Level Output Voltage V CC = Min, V IH = MinV IL = Max, I OH = −1 mA2.7V CC = Min, V IH = MinV IL = Max, I OH = −3 mA2.4 3.4 VV CC = Min, V IH = MinV IL = 0.5V, I OH = Max2V OL LOW Level Output Voltage V CC = Min I OL = 12 mA 0.4V IL = Max I OL = Max 0.5 VV IH = MinI OZH Off-State Output Current, V CC = Max V O = 2.7V 20 µAHIGH Level Voltage AppliedV IL = MaxI OZL Off-State Output Current, V IH = Min V O = 0.4V −20 µALOW Level Voltage AppliedI I Input Current at Maximum V CC = Max V I = 7V 0.1 mAInput VoltageI IH HIGH Level Input Current V CC = Max V I = 2.7V 20 µAI IL LOW Level Input Current V CC = Max V I = 0.4V −0.5 −200 µAI OS Short Circuit Output Current V CC = Max (Note 3) −40 −225 mAI CC Supply Current V CC = Max, Outputs HIGH 13 23Outputs Open Outputs LOW 27 46 mAOutputs Disabled 32 54Note 2: All typicals are at V CC = 5V, T A = 25°C.Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.www.fairchildsemi.com 2