參數(shù)資料
型號: SYM53C140
廠商: LSI CORP
元件分類: 其它接口
英文描述: Ultra2 SCSI Bus Expander(Ultra2 SCSI總線擴展器)
中文描述: SPECIALTY INTERFACE CIRCUIT, PQFP160
封裝: 32 MM, PLASTIC, QFP-160
文件頁數(shù): 10/68頁
文件大?。?/td> 928K
代理商: SYM53C140
1-2
Introduction
As shown in Table 1.1, the SYM53C140 operates in all modes: single-
ended, low-voltage differential, and high-voltage differential.
The SYM53C140 provides additional control capability through the pin
level electrical isolation mode. 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 SYM53C140 is based on bus expander technology resulting in some
signal filtering and re-timing to maintain signal skew budgets. The
SYM53C140 is independent of software.
1.1.1 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.
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