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DM74LS221 Fiches technique(PDF) 5 Page - Fairchild Semiconductor |
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DM74LS221 Fiches technique(HTML) 5 Page - Fairchild Semiconductor |
5 / 8 page 5 www.fairchildsemi.com Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Note 5: All typicals are at VCC = 5V, TA = 25°C. Note 6: Not more than one output should be shorted at a time, and the duration should not exceed one second. Switching Characteristics at VCC = 5V and TA = 25°C Symbol Parameter Conditions Min Typ Max Units (Note 5) 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 VCC = Min, IOL = 4 mA 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 VCC = Max A1, A2 −0.4 Input Current VI = 0.4V B −0.8 mA Clear −0.8 IOS Short Circuit VCC = Max −20 −100 mA Output Current (Note 6) ICC Supply Current VCC = Max Quiescent 4.7 11 mA Triggered 19 27 Symbol Parameter From (Input) Conditions Min Max Units To (Output) tPLH Propagation Delay Time A1, A2 CEXT = 80 pF 70 ns LOW-to-HIGH Level Output to Q REXT = 2 kΩ tPLH Propagation Delay Time B CL = 15 pF 55 ns LOW-to-HIGH Level Output to Q RL = 2 kΩ tPHL Propagation Delay Time A1, A2 80 ns HIGH-to-LOW Level Output to Q tPHL Propagation Delay Time B 65 ns HIGH-to-LOW Level Output to Q tPLH Propagation Delay Time Clear to 65 ns LOW-to-HIGH Level Output Q tPHL Propagation Delay Time Clear 55 ns HIGH-to-LOW Level Output to Q tW(out) Output Pulse A1, A2 CEXT = 0 Width Using Zero to Q, Q REXT = 2 kΩ 20 70 ns Timing Capacitance RL = 2 kΩ CL = 15 pF tW(out) Output Pulse A1, A2 CEXT = 100 pF Width Using External to Q, Q REXT = 10 kΩ 600 750 ns Timing Resistor RL = 2 kΩ CL = 15 pF CEXT = 1 µF REXT = 10 kΩ 67.5 ms RL = 2 kΩ CL = 15 pF CEXT = 80 pF REXT = 2 kΩ 70 150 ns RL = 2 kΩ CL = 15 pF |
Numéro de pièce similaire - DM74LS221 |
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Description similaire - DM74LS221 |
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