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74LS138 Datasheet(PDF) 4 Page - Fairchild Semiconductor |
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74LS138 Datasheet(HTML) 4 Page - Fairchild Semiconductor |
4 / 7 page www.fairchildsemi.com 4 DM74LS139 Recommended Operating Conditions DM74LS139 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Note 6: All typicals are at VCC = 5V, TA = 25°C. Note 7: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 8: ICC is measured with all outputs enabled and OPEN. DM74LS139 Switching Characteristics at VCC = 5V and TA = 25°C Symbol Parameter Min Nom Max Units VCC Supply Voltage 4.75 5 5.25 V VIH HIGH Level Input Voltage 2 V VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −0.4 mA IOL LOW Level Output Current 8 mA TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units (Note 6) VI Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V VOH HIGH Level VCC = Min, IOH = Max, 2.7 3.4 V Output Voltage VIL = Max, VIH = Min VOL LOW Level VCC = Min, IOL = Max 0.35 0.5 Output Voltage VIL = Max, VIH = Min V IOL = 4 mA, VCC = Min 0.25 0.4 II Input Current @ Max Input Voltage VCC = Max, VI = 7V 0.1 mA IIH HIGH Level Input Current VCC = Max, VI = 2.7V 20 µA IIL LOW Level Input Current VCC = Max, VI = 0.4V −0.36 mA IOS Short Circuit Output Current VCC = Max (Note 7) −20 −100 mA ICC Supply Current VCC = Max (Note 8) 6.8 11 mA From (Input) RL = 2 kΩ Symbol Parameter To (Output) CL = 15 pF CL = 50 pF Units MinMax MinMax tPLH Propagation Delay Time Select to Output 18 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Select to Output 27 40 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Enable to Output 18 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Enable to Output 24 40 ns HIGH-to-LOW Level Output |
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