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KK74LS138 AC ELECTRICAL CHARACTERISTICS (TA=25°C, VCC = 5.0 V, CL = 15 pF, RL = 2 kΩ, tr =15 ns, tf = 6.0 ns) Symbol Parameter Level Min Max Unit tPLH Maximum Propagation Delay, Input A to Output Y 2 20 ns tPHL Maximum Propagation Delay, Input A to Output Y 41 ns tPLH Maximum Propagation Delay, Input A to Output Y 3 27 ns tPHL Maximum Propagation Delay, Input A to Output Y 39 ns tPLH Maximum Propagation Delay , CS1 to Output Y 3 26 ns tPHL Maximum Propagation Delay , CS1 to Output Y 38 ns tPLH Maximum Output Transition Time , CS2 or CS3 to Output Y 2 18 ns tPHL Maximum Output Transition Time , CS2 or CS3 to Output Y 32 ns Figure 1. Switching Waveforms Figure 2. Switching Waveforms NOTES A. CL includes probe and jig capacitance. B. All diodes are 1N916 or 1N3064. Figure 3. Switching Waveforms Figure 4. Test Circuit 3 |
