am79c974 Advanced Micro Devices, am79c974 Datasheet - Page 109

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

AC SWITCHING TEST WAVEFORMS
SCSI Interface
SCSI CLK
SD [7:0]
REQ
ACK
SDP
2.3 V
0.8 V
Figure 30. Asynchronous Initiator Transmit
True Data Outputs SD [7:0], SDP
7
Hi-Z Outputs SD [7:0], SDP
Figure 29. Clock Input
P R E L I M I N A R Y
All Open Drain Outputs
4
Am79C974
3A
All Inputs
1
2
5
9
3
8
6
1.5 V
0.8 V
10
18681A-57
18681A-56
3.0 V
0.0 V
VOH
2.0 V
VOL
VOH – 0.3 V
2.0 V
VOL + 0.3 V
2.0 V
VOL
18681A-55
AMD
109