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DM74LS155 Datasheet(PDF) 4 Page - Fairchild Semiconductor |
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DM74LS155 Datasheet(HTML) 4 Page - Fairchild Semiconductor |
4 / 6 page www.fairchildsemi.com 4 DM74LS156 Recommended Operating Conditions DM74LS156 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Note 7: All typicals are at VCC = 5V, TA = 25° C. Note 8: ICC is measured with all outputs OPEN, A, B, and C1 inputs at 4.5V, and C2, G1, and G2 GROUNDED. DM74LS156 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 VOH HIGH Level Output Voltage 5.5 V IOL LOW Level Output Current 8 mA TA Free Air Operating Temperature 0 70 °C Symbol Parameter Conditions Min Typ Max Units (Note 7) VI Input Clamp Voltage VCC = Min, II = −18 mA −1.5 V ICEX HIGH Level VCC = Min, VO = 5.5V 100 µA Output Current 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 ICC Supply Current VCC = Max (Note 8) 6.1 10 mA From (Input) RL = 2 kΩ Symbol Parameter To (Output) CL = 15 pF CL = 50 pF Units Min Max Min Max tPLH Propagation Delay Time A, B, C2, G1 28 53 ns LOW-to-HIGH Level Output or G2 to Y tPHL Propagation Delay Time A, B, C2, G1 33 43 ns HIGH-to-LOW Level Output or G2 to Y tPLH Propagation Delay Time A or B 28 53 ns LOW-to-HIGH Level Output to Y tPHL Propagation Delay Time A or B 33 43 ns HIGH-to-LOW Level Output to Y tPLH Propagation Delay Time C1 28 53 ns LOW-to-HIGH Level Output to Y tPHL Propagation Delay Time C1 34 43 ns HIGH-to-LOW Level Output to Y |
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