Microsemi Corporation LX5115CPWP, LX5115CDW, LX5115CD Datasheet
LIN DOC #:
5115
UltraMAX
ULTRA 9-CHANNEL SCSI TERMINATOR
T HE I NFINITE P OWER OF I NNOVATION
DESCRIPTION KEY FEATURES
The LX5115 SCSI terminator is 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 its 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
LX5115 lies in its ability to insure reliable, errorfree communications even in systems which do
not adhere to recommended SCSI hardware design
guidelines, such as the use of improper cable
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
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 has a TTL
compatible sleep/disable mode. 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 sleepmode feature. Additionally, the disable function
permits factory-floor or production-line
configurability, reducing inventory and productline 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.
P RODUCTION DAT A SHEET
TM
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
CAPACITORS
■ IMPLEMENTS 8-BIT OR 16-BIT (
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
WIDE
)
PRODUCT HIGHLIGHT
DRIVING WAVEFORM - 20MHZRECEIVING WAVEFORM - 20MHZ
Receiver
1 Meter, AWG 28
LX5115 LX5115
LX5268 LX5268
PACKAGE ORDER INFORMATION
T
(°C)
J
Plastic SOIC
D
16-pin
Plastic SOWB
DW
16-pin
0 to 70 LX5115CD LX5115CDW LX5115CPWP
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5115CDWT)
Driver
PWP
Plastic TSSOP
20-pin, Power
NOTE:
For An In-Depth
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The Single-
Ended SCSI Bus"
Copyright © 1997
Rev. 1.1 12/97
L INF INITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
LX5115
ULTRA 9-CHANNEL SCSI TERMINATOR
RODUCTION DATA SHEET
P
ABSOLUTE MAXIMUM RATINGS (Note 1)
Continuous Termination Voltage .......................................................................... 10V
Continuous Output Voltage Range .............................................................. 0 to 5.5V
Continuous Disable Voltage Range .............................................................. 0 to 5.5V
Operating Junction Temperature ........................................................... 0°C to 125°C
Storage Temperature Range ............................................................. -65°C to +150°C
Solder Temperature (Soldering, 10 seconds) ................................................... 300°C
Note 1. Exceeding these ratings could cause damage to the device.
THERMAL DATA
D PACKAGE:
D
x θ
θθ
θ
θθ
JA
θθ
θ
θθ
JA
θθ
θ
θθ
JA
).
JA
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
DW PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
PWP PACKAGE:
THERMAL RESISTANCE-JUNCTION TO AMBIENT,
Junction Temperature Calculation: TJ = TA + (P
The θ
numbers are guidelines for the thermal performance of the device/pc-board system.
JA
All of the above assume no ambient airflow.
120°C/W
95°C/W
139°C/W
UltraMAX
PACKAGE PIN OUTS
TERM POWER
N.C.
GND
TERM POWER
N.C.
GND
D0
215
D1
314
D2
413
D3
512
D4
611
710
89
D PACKAGE
(Top View)
1 16
215
D0
314
D1
413
D2
512
D3
611
D4
710
89
DW PACKAGE
(Top View)
DISABLE
16
N.C.
D8
D7
D6
D5
N.C.
N.C.
DISABLE
N.C.
N.C.
D8
D7
D6
D5
N.C.
TERM POWER
HEATSINK/GND
HEATSINK/GND
N.C.
GND
219
318
D0
417
D1
516
D2
615
D3
714
D4
813
912
10 11
PWP PACKAGE
(Top View)
20
DISABLE
N.C.
HEATSINK/GND
N.C.
D8
D7
D6
D5
HEATSINK/GND
N.C.
2
Copyright © 1997
Rev. 1.1 12/97
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