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參數(shù)資料
| 型號： | SYM53C120 |
| 廠商： | LSI CORP |
| 元件分類： | 總線控制器 |
| 英文描述： | SCSI Bus Expander(SCSI總線擴展器) |
| 中文描述： | SCSI BUS CONTROLLER, PQFP128 |
| 封裝： | PLASTIC, QFP-128 |
| 文件頁數(shù)： | 2/4頁 |
| 文件大小： | 452K |
| 代理商： | SYM53C120 |
The SYM53C120 electrically isolates a SCSI bus into two
distinctive segments. It supports both single-ended to
single-ended, and single-ended to differential modes
(using of external differential transceivers). The A side
needs to be connected directly to a single-ended SCSI bus.
The B side has the single-ended capable transceivers as
well as the individual driver controls for external
differential transceivers.
The SYM53C120 provides additional control capability
through the pin level SCSI bus disable mode. This
feature allows logical disconnection of both the A side
bus and B side bus to without disrupting transfers
currently in progress. For example, devices on the
logically disconnected B side can be swapped out while
the A side bus remains active.
As with all of the Symbios SYM53C7xx and SYM53C8xx
SCSI products, the SYM53C120 features TolerANT
technology. The benefits of TolerANT include increased
immunity to noise when the signal is going high, better
performance due to balanced duty cycles, and improved
SCSI transfer rates.
The following are examples of typical SCSI bus repeater
and converter applications for the SYM53C120. Many
other configurations are possible and are only limited by
the imagination of the system architect.
Scalable Device
Connectivity —
This
diagram shows how the
SYM53C120 could be used
to repeat single-ended Ultra
SCSI cable distances to
maximize device connectivity.
This configuration utilizes a 3
meter cable to support up to
16 devices on a single
channel host controller.
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This example employs both
SCSI bus repeater and
converter applications. This
configuration demonstrates
remote storage capability
and SCSI bus channel
redundancy.
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