6 Parameter Measurement Information

t_PD is the maximum between t_PLH and t_PHL

t_t is the maximum between t_TLH and t_THL

Figure 6-1 HC and HCT transition times and propagation delay times, combination logic

Figure 6-3 HC three-state propagation delay waveform

NOTE: Open drain waveforms t_PLZ and t_PZL are the same as those for three-state shown on the left. The test circuit is Output R_L = 1kΩ to V_CC, C_L = 50pF.

Figure 6-5 HC and HCT three-state propagation delay test circuit

Figure 6-2 HCT transition times and tpopationg delay times, combination logic

Figure 6-4 HCT three-state propagation delay waveform