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DM74LS138M 数据表(PDF) 3 Page - Fairchild Semiconductor |
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DM74LS138M 数据表(HTML) 3 Page - Fairchild Semiconductor |
3 / 7 page 3 www.fairchildsemi.com Absolute Maximum Ratings(Note 2) Note 2: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. DM74LS138 Recommended Operating Conditions DM74LS138 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Note 3: All typicals are at VCC = 5V, TA = 25°C. Note 4: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 5: ICC is measured with all outputs enabled and OPEN. DM74LS138 Switching Characteristics at VCC = 5V and TA = 25°C Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 0 °C to +70°C Storage Temperature Range −65°C to +150°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 3) VI Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V VOH HIGH Level Output Voltage VCC = Min, IOH = Max, VIL = Max, VIH = Min 2.7 3.4 V VOL LOW Level VCC = Min, IOL = Max, VIL = Max, VIH = Min 0.35 0.5 V Output Voltage 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 4) −20 −100 mA ICC Supply Current VCC = Max (Note 5) 6.3 10 mA From (Input) Levels RL = 2 kΩ Symbol Parameter To (Output) of Delay CL = 15 pF CL = 50 pF Units Min Max Min Max tPLH Propagation Delay Time Select to Output 2 18 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Select to Output 2 27 40 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Select to Output 3 18 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Select to Output 3 27 40 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Enable to Output 2 18 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Enable to Output 2 24 40 ns HIGH-to-LOW Level Output tPLH Propagation Delay Time Enable to Output 3 18 27 ns LOW-to-HIGH Level Output tPHL Propagation Delay Time Enable to Output 3 28 40 ns HIGH-to-LOW Level Output |
类似零件编号 - DM74LS138M |
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类似说明 - DM74LS138M |
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