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DM74LS47 数据表(PDF) 4 Page - Fairchild Semiconductor |
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DM74LS47 数据表(HTML) 4 Page - Fairchild Semiconductor |
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4 / 6 page ![]() www.fairchildsemi.com 4 Absolute Maximum Ratings(Note 6) Note 6: 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. Recommended Operating Conditions Note 7: OFF-State at a–g. Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted) Note 8: All typicals are at VCC = 5V, TA = 25°C. Note 9: Not more than one output should be shorted at a time, and the duration should not exceed one second. Switching Characteristics at VCC = +5.0V, TA = +25°C Note 10: LT = HIGH, A0–A3 = LOW 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 −250 µA a − g @ 15V = V OH (Note 7) IOH HIGH Level Output Current BI /RBO −50 µA IOL LOW Level Output Current 24 mA TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units (Note 8) 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, BI /RBO IOFF Output HIGH Current Segment Outputs VCC = 5.5V, VO = 15V a − g 250 µA VOL LOW Level VCC = Min, IOL = Max, 0.35 0.5 Output Voltage VIH = Min, a − g IOL = 3.2 mA, BI /RBO 0.5 V IOL = 12 mA, a –g 0.25 0.4 IOL = 1.6 mA, BI /RBO 0.4 II Input Current @ Max VCC = Max, VI = 7V 100 µA Input Voltage VCC = Max, VI = 10V IIH HIGH Level Input Current VCC = Max, VI = 2.7V 20 µA IIL LOW Level Input Current VCC = Max, VI = 0.4V −0.4 mA IOS Short Circuit VCC = Max (Note 9), mA Output Current IOS at BI/RBO −0.3 −2.0 ICC Supply Current VCC = Max 13 mA RL = 665Ω Symbol Parameter Conditions CL = 15 pF Units Min Max tPLH Propagation Delay 100 ns tPHL An to a –g 100 tPLH Propagation Delay 100 ns tPHL RBI to a –g (Note 10) 100 |
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