5 Parameter Measurement Information

A.

CL includes probe and test-fixture capacitance.

B.

Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following

characteristics: 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.

E.

tPLH and tPHL are the same as tpd.

Figure 5-1. Load Circuit and Voltage Waveforms

www.ti.com

SN54HC393, SN74HC393

SCLS143E – DECEMBER 1982 – REVISED DECEMBER 2024

Copyright © 2024 Texas Instruments Incorporated

Submit Document Feedback

7

Product Folder Links: SN54HC393 SN74HC393