LX5115CDW-TR [MICROSEMI]
SCSI Terminator, 9-Line, BICMOS, PDSO16, ROHS COMPLIANT, PLASTIC, SO-16;
| 型号： | LX5115CDW-TR |
| 厂家： | 
Microsemi |
| 描述： | SCSI Terminator, 9-Line, BICMOS, PDSO16, ROHS COMPLIANT, PLASTIC, SO-16 信息通信管理 光电二极管 接口集成电路 |
| 文件： | 总4页 (文件大小：178K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
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
I
N C . –
I
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
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX5115
UltraMAX
U L T R A 9 - C H A N N E L S C S I T E R M I N A T O R
P R O D U C T I O N D A T A S H E E T
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE PIN OUTS
Peak Package Solder Reflow Temp. (40 second max. exposure)................260°C (+0, -5)
Continuous Termination Voltage ..........................................................................10V
TERM POWER
16
15
14
13
12
11
10
9
DISABLE
N.C.
D8
D7
D6
D5
N.C.
N.C.
D0
D1
D2
D3
D4
2
3
4
5
6
7
8
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
N.C.
GND
Note 1. Exceeding these ratings could cause damage to the device.
D PACKAGE
(Top View)
THERMAL DATA
D & DW Package: RoHS / Pb-free 100% Matte Tin Lead Finish
D PACKAGE:
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
TERM POWER
DISABLE
N.C.
N.C.
D8
D7
D6
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
DW PACKAGE:
120°C/W
95°C/W
D0
D1
D2
D3
D4
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
PWP PACKAGE:
N.C.
GND
D5
N.C.
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
139°C/W
Junction Temperature Calculation: TJ = TA + (P x θJA).
The θJA numbers are guidelines for the thermal Dperformance of the device/pc-board system.
DW PACKAGE
(Top View)
All of the above assume no ambient airflow.
TERM POWER
20
DISABLE
HEATSINK/GND
2
3
4
5
6
7
8
19
18
17
16
15
14
13
N.C.
HEATSINK/GND
N.C.
D8
D7
D6
D5
D0
D1
D2
D3
D4
HEATSINK/GND
N.C.
9
12
11
HEATSINK/GND
N.C.
10
GND
PWP PACKAGE
(Top View)
Copyright © 1997
Rev. 1.2b
2
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX5115
UltraMAX
U L T R A 9 - C H A N N E L S C S I T E R M I N A T O R
P R O D U C T I O N D A T A S H E E T
RECOMMENDED OPERATING CONDITIONS
(Note 2)
Recommended Operating Conditions
Parameter
Symbol
Units
Min.
Typ.
Max.
Termination Voltage
VTERM
VIH
4.0
2
5.5
VTERM
0.8
V
V
V
High Level Enable Input Voltage
Low Level Disable Input Voltage
Operating Virtual Junction Temperature Range
LX5115C
VIL
0
0
125
°C
Note 2. Range over which the device is functional.
ELECTRICAL CHARACTERISTICS
Term Power = 4.75V unless otherwise specified. Unless otherwise specified, these specifications apply at the recommended operating ambient tempera-
ture of TA = 25°C. Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient temperature.
LX5115
Typ.
Parameter
Symbol
Test Conditions
Units
Min.
Max.
Output High Voltage
TermPwr Supply Current
VOUT
ICC
2.65
2.85
5.5
210
150
-23
10
-15
20
3
V
All data lines = open
9
mA
mA
µA
mA
nA
µA
nA
pF
All data lines = 0.5V
Disable Pin < 0.8V
VOUT = 0.5V
225
Output Current
IOUT
-21
-24
Disable Input Current
I
Disable Pin = 4.75V
Disable Pin = 0V
IN
Output Leakage Current
Capacitance in Disabled Mode
Channel Bandwidth
IOL
COUT
BW
ISINK
Disable Pin = < 0.8V, VO = 0.5V
VOUT = 0V, frequency = 1MHz
35
37
MHz
mA
Termination Sink Current, per Channel
VOUT = 4V
Copyright © 1997
Rev. 1.2b
3
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX5115
UltraMAX
U L T R A 9 - C H A N N E L S C S I T E R M I N A T O R
P R O D U C T I O N D A T A S H E E T
BLOCK DIAGRAM
TERM POWER
CURRENT
BIASING
CIRCUIT
THERMAL
LIMITING
CIRCUIT
24mA CURRENT
LIMITING CIRCUIT
DATA OUTPUT
PIN DB(0)
2.85V
DISABLE
PIN
1.4V
1 OF 9 CHANNELS
FUNCTIONAL DESCRIPTION
Cable transmission theory suggests to optimize signal speed
and quality, the termination should act both as an ideal voltage
reference when the line is released (deasserted) and as an
ideal current source when the line is active (asserted). Common
active terminators, which consist of
by delivering 24mA on assertion and by imposing 2.85V on
deassertion. In order to disable the device, the Disable pin
must be driven logic Low. This mode of operation places
the device in a sleep state where a meager 150µA of quiescent
current is consumed. Additionally, all
Linear Regulators in series with resis-
outputs are in a Hi-Z (impedance)
state. Sleep mode can be used for
POWER UP / POWER DOWN FUNCTION TABLE
tors (typically 110Ω), are a compro-
mise. As the line voltage increases,
the amount of current decreases lin-
Disable
LX5115
Quiescent
Current
power conservation or to completely
eliminate the terminator from the SCSI
chain. In the second case, termination
node capacitance is important to
consider. The terminator will appear
as a parasitic distributed capacitance
on the line, which can detract from bus
performance. For this reason, the
Outputs
early by the equation V = I R. The
*
H
L
Open
Enabled
HI Z
Enabled
5.5mA
150µA
5.5mA
LX5115, with its unique new architec-
ture applies the maximum amount of
current regardless of line voltage until
the termination high threshold (2.85V)
is reached.
Acting as a near ideal line terminator, the LX5115 closely
reproduces the optimum case when the device is enabled.
To enable the device the Disable Pin must be pulled Logic
High or left open. During this mode of operation, quiescent
current is 5.5mA and the device will respond to line demands
LX5115 has been optimized to have only 3pF of capacitance
per output in the sleep state.
An additional feature of the LX5115 is its compatibility with
active negation drivers. The device handles up to 37mA of
sink current for drivers which exceed the 2.85V output high.
UltraMAX is a trademark of Linfinity Microelectronics Inc.
PRODUCTIONDATA-InformationcontainedinthisdocumentisproprietarytoLinFinity, andiscurrentasofpublicationdate. Thisdocument
may not be modified in any way without the express written consent of LinFinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
Copyright © 1997
Rev. 1.2b
4
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