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PDF LX5218 Data sheet ( Hoja de datos )
| Número de pieza | LX5218 | |
| Descripción | 9-CHANNEL PLUG AND PLAY SCS I TERMINATOR | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LX5218 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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THE INFINITE POWER OF INNOVATION
UltraMAX™
LX5218
9-CHANNEL PLUG AND PLAY SCSI TERMINATOR
PRODUCTION DATA SHEET
DESCRIPTION
The LX5218 SCSI terminator is part of Linfinity's
UltraMAX family of high-performance, adaptive,
nonlinear 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. It 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 LX5218
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 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 LX5218 architecture is
much more tolerant of marginal system
integrations. The LX5218 has two disconnect pins
for SCSI Plug and Play (PnP) applications.
Quiescent current is typically less than (275µA) in
disable 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 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
LX5218 architecture. Traditional termination
techniques require large stabilization and transient
protection capacitors of up to 20µF in value and
size. The LX5218 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
SCSI PLUG AND PLAY, DUAL
LOW DISCONNECT, LOGIC
LOW COMMAND
DISCONNECTS ALL
TERMINATION LINES
HOT SWAP COMPATIBLE
ULTRA-FAST RESPONSE FOR
FAST-20 SCSI APPLICATIONS
35MHz CHANNEL BANDWIDTH
3.5V OPERATION
LESS THAN 3pF OUTPUT
CAPACITANCE
DISABLE-MODE CURRENT
LESS THAN 275µA
THERMALLY SELF LIMITING
NO EXTERNAL
COMPENSATION
CAPACITORS
IMPLEMENTS 8-BIT OR 16-BIT
( WIDE) APPLICATIONS
COMPATIBLE WITH ACTIVE
NEGATION DRIVERS (60mA /
CHANNEL)
COMPATIBLE WITH PASSIVE
AND ACTIVE TERMINATIONS
APPROVED FOR USE WITH
SCSI-1, -2, -3 AND ULTRASCSI
CONSULT FACTORY FOR
APPLICATION TEST REPORT
PRODUCT HIGHLIGHT
Copyright © 1997
Rev. 1.7a,2005-03-01
Receiver
Driver
LX5218
1 Meter, AWG 28
LX5218
LX5268
LX5268
-----NOTE-----
For An In-Depth Discussion On Apply SCSI, Visit
www.microsemi.com/support/micnotes.asp and
view the SCSI Solutions Section (Series 1200)
TA (°C)
0 to 70
PACKAGE ORDER INFO
Plastic SOWB
Plastic TSSOP
DW 16-Pin
PW 20-Pin
RoHS Compliant / Pb-free
Transition DC: 0516
RoHS Compliant / Pb-free
Transition DC: 0442
LX5218CDW
LX5218CPW
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e.
LX5218CDW-TR)
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
1 page  
UltraMAX
PRODUCT DATABOOK 1996/1997
9-CHANNEL PLUG AND PLAY SCSI TERMINATOR
PRODUCTION DATA SHEET
LX5218
GRAPH / CURVE INDEX
Waveforms
FIGURE #
1A. RECEIVING WAVEFORM (Freq. = 1.0MHz)
1B. DRIVING WAVEFORM
2A. RECEIVING WAVEFORM (Freq. = 5.0MHz)
2B. DRIVING WAVEFORM
3. 10MHz WAVEFORM
4. 20MHz WAVEFORM
Characteristic Curves
FIGURE #
5. OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE
6. OUTPUT CURRENT vs. JUNCTION TEMPERATURE
7. OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (VT = 4.75V)
8. OUTPUT CURRENT vs. OUTPUT HIGH VOLTAGE (VT = 3.3V)
9. TERMINATION VOLTAGE vs. SUPPLY CURRENT
10. TERMPWR SUPPLY CURRENT vs. TERMINATION VOLTAGE (Disabled)
— LX5218
11. OUTPUT HIGH VOLTAGE vs. JUNCTION TEMPERATURE (VT = 3.3V)
12. OUTPUT CURRENT vs. JUCTION TEMPERATURE (VT = 3.3V)
13. OUTPUT HIGH VOLTAGE vs. TERMINATION VOLTAGE
14. OUTPUT CURRENT vs. TERMINATION VOLTAGE
15. OUTPUT CURRENT MATCHING CHANNEL TO CHANNEL
FIGURE INDEX
Application Circuits
FIGURE #
16. 8-BIT SCSI SYSTEM APPLICATION
Copyright © 1997
Rev. 1.7a
5
5 Page 
UltraMAX
PRODUCT DATABOOK 1996/1997
9-CHANNEL PLUG AND PLAY SCSI TERMINATOR
PRODUCTION DATA SHEET
LX5218
CHARACTERISTIC CURVES
FIGURE 13. — OUTPUT HIGH VOLTAGE
vs. TERMINATION VOLTAGE
4
3.5
3
2.5
2
1.5
1
0.5
0
3 3.5 4 4.5 5 5.5
(VTERM) Termination Voltage - (V)
6
FIGURE 14. — OUTPUT CURRENT vs. TERMINATION VOLTAGE
25
20
15
10
5
0
3 3.5 4 4.5 5 5.5 6
(VTERM) Termination Voltage - (V)
Copyright © 1997
Rev. 1.7a
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LX5218.PDF ] | |
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