Avago Technologies LSI53C140 - Manual (Page 12)

1-2 Using the LSI53C140
Ver. 2.1 Copyright © 1998–2001 by LSI Logic Corporation. All rights reserved.
Figure 1.1 LSI53C140 SCSI Bus Modes
The LSI53C140 is also capable of supporting any combination of SE or
LVD bus mode on either the A or B Side port when using a 192-ball
Plastic Ball Grid Array (PBGA) package.
Figure 1.1 illustrates the three
SCSI bus modes available on the A or B Side.
Figure 1.2 LSI53C140 SCSI Bus Modes
Refer to the Board Design Considerations in Appendix B about the
LSI53C140 to LSI53C180 as a drop in replacement along with board
design information.
The LSI53C140 operates as both an expander and converter. In both
SCSI bus expander and converter modes, cable segments are
electrically isolated from each other. This feature maintains the signal
integrity of each cable segment.
LSI53C140
SCSI Expander
160 PQFP
A-Side B-Side
LVD
HVD (*)
SE
LVD
HVD (*)
SE
* All HVD requires external differential transceivers and terminations.
LSI53C140
SCSI Expander
192 PBGA
A Side B Side
LVD
HVD (*)
SE
LVD
HVD (*)
SE
* All HVD requires external differential transceivers and terminations.