Avago Technologies LSI53C825AE - Manual (Page 54)

2-30 Functional Description
accommodating terminators. The terminators should be socketed, so that
if not needed they may be removed, or there should be a means of
disabling them with software.
SE cables can use a 220
Ω
pull-up to the terminator power supply (Term
Power) line and a 330
Ω
pull-down to ground. Because of the
high-performance nature of the LSI53C825A, Regulated (or Active)
termination is recommended.
Note: If the LSI53C825A is to be used in a design with only an
8-bit SCSI bus, all 16 data lines still must be terminated or
pulled HIGH.
Figure 2.3 is an example differential wiring diagram.
Figure 2.4 shows a Unitrode active terminator. For additional information,
refer to the SCSI-2 Specification. TolerANT active negation can be used
with either termination network.