6 Parameter Measurement Information

tpd is the maximum between tPLH and tPHL

Figure 6-1. Load Circuit

Figure 6-2. Voltage Waveforms

Pulse Durations

Figure 6-3. Voltage Waveforms

Setup and Hold and Input Rise and Fall Times

Figure 6-4. Voltage Waveforms

Propagation Delay and Output Transition Times

A. CL includes probe and jig capacitance.

B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators

having the following charactersitics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.

C. For clock inputs, fmax is measured when the input duty cycle is 50%

D. The outputs are measured one at a time with one input transition per measurement.

SN54HC166, SN74HC166

SCLS117E – DECEMBER 1982 – REVISED FEBRUARY 2022

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