Not Recommended For New Design
™
UltraMAX
LX5115
®
ULTRA 9- CHANNEL SCSI TERMINATOR
TM
P
R O D U C T I O N D A T A S H E E T
T
H E
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N F I N I T E
P
O W E R O F
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N N O V A T I O N
KEY FEATURES
DESCRIPTION
The LX5115 SCSI terminator is part of
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 LX5115
architecture is much more tolerant of marginal
system integrations. Recognizing the needs of
portable and configurable peripherals, the LX5115
ULTRA-FAST RESPONSE
FOR FAST-20 SCSI
APPLICATIONS
35MHz CHANNEL
BANDWIDTH
LESS THAN 3pF OUTPUT
CAPACITANCE
SLEEP-MODE CURRENT OF
150µA
NO EXTERNAL
COMPENSATION
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 its design offers superior
performance to older linear passive and active
techniques.
has
a TTL compatible sleep/disable mode.
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 LX5115
lies in its 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
Quiescent current is typically 150µA 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
CAPACITORS
IMPLEMENTS 8-BIT OR 16-BIT
( WIDE) APPLICATIONS
COMPATIBLE WITH ACTIVE
NEGATION DRIVERS (37mA /
CHANNEL)
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 DS21S07A / 2105
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 LX5115 architecture. Traditional
termination techniques require large stabilization
and transient protection capacitors of up to 20µF
in value and size. The LX5115 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
PRODUCT HIGHLIGHT
RECEIVIN G
W
AVEFO RM - 2 0 MH
Z
DRIVIN G W AVEFO RM - 2 0 MHZ
Receiver
Driver
NOTE:
For An In-Depth
1 Meter, AWG 28
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The Single-
Ended SCSI Bus"
LX5115
LX5115
LX5268
LX5268
PACKAGE ORDER INFO
Plastic SOIC
16-Pin
Plastic SOWB
Plastic TSSOP
20-Pin, Power
D
DW
PWP
16-Pin
TJ (°C)
RoHS Compliant Pb-free
Transition DC: 0440
RoHS Compliant Pb-free
Transition DC: 0516
0 to 70
LX5115CD
LX5115CDW
LX5115CPWP
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX5115CD-TR)
M
I C R O S E M I
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N C . –
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N T E G R A T E D P R O D U C T S D I V I S I O N
Copyright © 1997
Rev. 1.2b,2005-04-07
1
11861 WESTERN
A
VENUE, GARDEN
G
ROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570