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)： 12/68頁
文件大?。?/td> 928K
代理商： SYM53C140
1-4
Introduction
In the second example, Figure 1.3, the SYM53C140 is cascaded to
achieve four distinct SCSI segments. Segments A and D can be treated
as point-to-point segments. Segments B and C are treated as load
segments with at least 8 inch spacing between every node. Table 1.3
shows the various distance requirements for each transmission mode.
Figure 1.3
SYM53C140 SCSI Bus Device
1.1.2 Features
A flexible SCSI bus expander that supports any combination of Low-
Voltage Differential (LVD), Single-Ended (SE), or High-Voltage
Differential Transceivers (HVD)
Creates distinct SCSI bus segments that are electrically isolated
from each other
Table 1.3
Transmission Mode Distance Requirements
Segment
Mode
Length Limit
A, D
LVD (Ultra2)
25 meters
SE (Ultra)
20 meters
HVD (Ultra)
25 meters
B, C
LVD (Ultra2)
12 meters
SE (Ultra)
1.5 meters
HVD (Ultra)
25 meters
Segment A
Segment B
Segment C
Primary
Server
Secondary
Server
Shared Disk
Subsystem
SCSI Bus
Expander
SCSI Bus
Expander
SCSI Bus
Expander
Segment D
Shared Disk
Subsystem
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