4608X-102-102 Datasheet, PDF (51/62 Pages) Bourns Electronic Solutions – Resistor Networks Product Selection Guide

SCSI Applications
AMERICAN NATIONAL STANDARD X3 131-1986
Peripheral devices such as magnetic-disks, printers,
optical-disks, and magnetic-tapes.
COMPUTER
SCSI BUS
CONTROLLER
SINGLE INITIATOR, SINGLE TARGET
....
COMPUTER
SCSI BUS
CONTROLLER
CONTROLLER
SINGLE INITIATOR, MULTIPLE TARGET
....
....
COMPUTER
COMPUTER
COMPUTER
SCSI BUS
CONTROLLER
CONTROLLER
CONTROLLER
CONTROLLER
CONTROLLER
MULTIPLE INITIATOR, MULTIPLE TARGET
BLOCK DIAGRAM OF SCSI SYSTEM
....
....
....
....
....
Use Bourns Networks to:
• Provide the terminating resistors required for SCSI
implementation.
• Optimize signal transmission by eliminating overshoot
and ringing.
• Minimize space and routing problems, and reduce
manufacturing cost per installed resistive function.
• Increase board yields and reliability by reducing
component count.
Specifications are subject to change without notice.
Termination Of The SCSI Bus
The Small Computer System Interface follows American
National Standard which provides the mechanical, electrical, and
functional requirements for an input/output bus to connect small
computers with a variety of peripheral devices. The most com-
mon application of this bus is to connect small computers with
disk drive (mass storage) units.
The primary resistor network application in SCSI busses is line
termination. The termination method is specified in ANSI
X3.131-1986 as either a Thevenin equivalent dual terminator
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