Avago Technologies LSI53C120 - Manual (Page 15)

Features 1-3
1.2 Features
The LSI53C120 Ultra SCSI Bus Expander supports these features:
•
Accepts any asynchronous or synchronous data transfer rates up to
the 40 MB/s rate of Wide Ultra SCSI
•
Allows targets and initiators to connect either to the SCSI A-side or
SCSI B-side of the LSI53C120
•
Does not consume a SCSI ID
•
Can cascade up to three LSI53C120s in series
•
Requires 40 MHz input clock
•
Supports two modes of operation
– Single-ended to Single-ended Mode
– Single-ended to High Voltage Differential Mode
(with external transceivers)
•
Connects two wide and/or narrow SCSI buses
– Extends Ultra SCSI cable lengths in certain applications
– Extends total number of connected Ultra SCSI devices
supported
•
Supports TolerANT
®
active negation technology
•
Includes complete support for SCSI-1, SCSI-2, and SCSI-3
•
Does not require software
•
Allows pin level SCSI bus disable mode
•
Comes packaged in a 128-pin PQFP
•
Includes TolerANT Technology
The LSI53C120 SCSI Bus Expander works with the extensive LSI Logic
LSI53C7xx and LSI53C8xx family of SCSI products. It also works with
other industry SCSI controllers, disk drives, and SCSI peripherals.
Advantages of the LSI53C120 are that it does not require any software
or consume a SCSI ID. This allows for easy integration and maximum
bus utilization. Adding the LSI53C120 to a SCSI bus environment
creates a low risk solution for applications requiring scalable device
connectivity and SCSI bus electrical isolation.