am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 100

• Manufacturer Part Number: am79c974
• Description: Pcnettm-scsi Combination Ethernet And Scsi Controller For Pci Systems
• Manufacturer: Advanced Micro Devices

KEY TO SWITCHING WAVEFORMS
AC SWITCHING TEST CIRCUITS
100
AMD
Sense Point
WAVEFORM
Normal and Three-State Outputs
P R E L I M I N A R Y
C
L
Am79C974
INPUTS
Must be
Steady
May
Change
from H to L
May
Change
from L to H
Don’t Care,
Any Change
Permitted
Does Not
Apply
I
I
OL
OH
OUTPUTS
Will be
Steady
Will be
Changing
from H to L
Will be
Changing
from L to H
Changing,
State
Unknown
Center
Line is High-
Impedance
“Off” State
18681A-37
V
THRESHOLD