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 Transition Times and Propagation Delay Times, Combination Logic

Figure 6-3 HC Three-State Propagation Delay Waveform

A. 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 = 50 pF.

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

Figure 6-2 HCT Transition Times and Propagation Delay Times, combination Logic

Figure 6-4 HCT Three-State Propagation Delay Waveform