5 Parameter Measurement Information

Figure 5-1. Clock Prerequisite and Propagation

Delays

Figure 5-2. Clock Prerequisite and Propagation

Delays

Figure 5-3. Three-state Propagation Delay Times

and Test Circuit

Figure 5-4. Data Prerequisite Times

Figure 5-5. Test Circuit

CD54/74AC

CD54/74ACT

Input Level

VCC

3 V

Input Switching Voltage, VS

0.5 VCC

1.5 V

Output Switching Voltage, VS

0.5 VCC

0.5 VCC

CD54AC299, CD74AC299, CD74AC323, CD54ACT299, CD74ACT299

SCHS288A – DECEMBER 1998 – REVISED DECEMBER 2024

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