Avago Technologies LSI53C140 - Manual (Page 13)

Applications 1-3
Ver. 2.1 Copyright © 1998–2001 by LSI Logic Corporation. All rights reserved.
Table 1.1 shows the types of operations for the LSI53C140 160 Plastic
Quad Flat Pack (PQFP).
The LSI53C140 provides additional control capability through the pin
level isolation mode (Warm Swap Enable). This feature permits logical
disconnection of both the A Side bus and the B Side bus without
disrupting SCSI transfers currently in progress. For example, devices on
the logically disconnected B Side can be swapped out while the A Side
bus remains active.
The LSI53C140 is based on previous bus expander technology resulting
in some signal filtering and retiming to maintain signal skew budgets. The
LSI53C140 is independent of software.
1.2 Applications
The LSI53C140 supports these applications:
•
Server clustering environments
•
Expanders creating distinct SCSI cable segments which are
electrically isolated from each other
Table 1.1 Types of Operation
Signal Type Mode Speed
LVD to LVD Repeater Ultra2
HVD to HVD
1
1. All HVD requires external differential transceivers and terminations.
Repeater Ultra
SE to SE Repeater Ultra
Or any combination above for Repeater.
LVD to HVD
1
Converter Ultra
LVD to SE Converter Ultra
HVD
1
to SE Converter Ultra
Or any combination above for Converter.