6 Parameter Measurement Information

tpd is the maximum between tPLH and tPHL

tt is the maximum between tTLH and tTHL

Figure 6-1. HC Transition Times and Propagation

Delay Times, Combination Logic

Figure 6-2. HCT Transition Times and Propagation

Delay Times, Combination Logic

Figure 6-3. HC Three-State Propagation Delay

Waveform

Figure 6-4. HCT Three-State Propagation Delay

Waveform

Note

Open drain waveforms tPLZ and tPZL are the same as those for three-state shown on the left. The test

circuit is Output RL = 1 kΩ to VCC, CL = 50 pF.

Figure 6-5. HC and HCT Three-State Propagation Delay Test Circuit

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CD54HC367, CD74HC367, CD54HCT367

CD74HCT367, CD54HC368, CD74HC368, CD74HCT368

SCHS181E – NOVEMBER 1997 – REVISED FEBRUARY 2022

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