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Microsemi Corporation - ULT RA 9 - CHANNEL SCSI TERMINATOR

Numéro de référence LX5112A
Description ULT RA 9 - CHANNEL SCSI TERMINATOR
Fabricant Microsemi Corporation 
Logo Microsemi Corporation 





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LX5112A fiche technique
THE INFINITE POWER OF INNOVATION
Not Recommended For New Design
UltraMAX
LX5111A / 5112A
ULTRA 9-CHANNEL SCSI TERMINATOR
PRELIMINARY DATA SHEET
DESCRIPTION
The LX5111A/5112A SCSI terminators are part
of Linfinity's UltraMAX family of high-
performance, adaptive, non-linear mode SCSI
products, which are designed to deliver true
UltraSCSI performance in SCSI applications. The
low voltage BiCMOS architecture employed in
their design offers superior performance to older
linear passive and active techniques. Linfinity's
UltraMAX architecture employs high-speed
adaptive elements for each channel, thereby
providing the fastest response possible — typically
35MHz, which is 100 times faster than the older
linear regulator/terminator approach used by other
manufacturers. Products using this older linear
regulator approach have bandwidths which are
dominated by the output capacitor and which are
limited to 500KHz (see further discussion in the
Functional Description section). The UltraMAX
architecture also eliminates the output
compensation capacitor typical in earlier terminator
designs. Each is approved for use with SCSI-1, -2, -
3, UltraSCSI and beyond — providing the highest
performance alternative available today. Another
key improvement offered by the LX5111A/12A lies
in their ability to insure reliable, error-free
communications even in systems which do not
adhere to recommended SCSI hardware design
guidelines, such as the use of improper
cable lengths and impedances. Frequently, this
situation is not controlled by the peripheral or host
designer and, when problems occur, they are the
first to be made aware of the problem. The
LX5111A/12A architecture is much more tolerant
of marginal system integrations. Recognizing the
needs of portable and configurable peripherals, the
LX5111A/12A have a TTL compatible
sleep/disable mode. Quiescent current is typically
less than 275µA in this mode, while the output
capacitance is also less than 3pF. The obvious
advantage of extended battery life for portable
systems is inherent in the product's sleep-mode
feature. Additionally, the disable function permits
factory-floor or production-line configurability,
reducing inventory and product line diversity
costs. Field configurability can also be
accomplished without physically removing
components which, often times results in field
returns due to mishandling. Reduced component
counts is also inherent in the LX5111A/12A's
architecture. Traditional termination techniques
require large stabilization and transient protection
capacitors of up to 20µF in value and size. The
LX5111A/12A architecture does not require these
components, allowing all the cost savings
associated with inventory, board space, assembly,
reliability, and component costs.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
„ Ultra-Fast Response For FAST-
20 SCSI Applications
„ 35MHz Channel Bandwidth
„ 3.0V Operation
„ Less Than 3pF Output
Capacitance
„ Thermally Self-Limiting
„ NO External Compensation
Capacitors
„ Implements 8-bit Or 16-bit (
Wide) Applications
„ Compatible with Active Negation
Drivers
„ Compatible With Passive And
Active Terminations
„ Approved For Use With SCSI 1,
2, 3 And Ultra SCSI
„ Hot-Swap Compatible
„ Pin-For-Pin Compatible With
LX5211 and UC5606 (LX5111)
„ Pin-For-Pin Compatible With
LX5212 And UC5603/5613/5614
(LX5112)
PRODUCT HIGHLIGHT
Copyright © 1999
Rev. 0.2a,2005-03-10
TA (°C)
0 to 70
PACKAGE ORDER INFO
Plastic SOIC
Plastic TSSOP
DP 16-Pin, Power PWP 24-Pin, Power
ROHS Compliant / Pb-free
transition DC: 0440
LX5111ACDP
LX5111ACPWP
LX5112ACDP
LX5112ACPWP
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e.
LX5111ACDP-TR)
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1

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