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LX5207 Datasheet(PDF) 1 Page - Microsemi Corporation

Part No. LX5207
Description  18-LINE LOW CAPACITANCE, μPOWER SCSI TERMINATOR
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

LX5207 Datasheet(HTML) 1 Page - Microsemi Corporation

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DESCRIPTION
The LX5207 is an eighteen line active ter-
minator for the SCSI parallel bus. This SCSI
standard recommends active termination at
both ends of the SCSI bus.
During disconnect mode, the LX5207
requires a meager 500nA of supply current
while offering only 2.5pF of output capaci-
tance. To enter this low power mode, the
disconnect pin can be left open (floating)
or driven high thereby disconnecting the
terminating resistors and placing the inter-
nal low dropout regulator into low power
mode. In disconnect mode each termina-
tion line presents a high impedance to the
SCSI bus with the overall effect being to
preserve high signal integrity and subse-
quent reliable, error free communications.
During normal operation, the LX5207
consumes only 800µA of current which is
PRODUCT HIGHLIGHT
P ACKAGE ORDER INFO
T
A (°C)
0 to 70
LX5207CDWP
Plastic SOWB
28-pin, Power
DWP
the lowest enabled supply current of any
terminator available on the market today.
Linfinity's proprietary BiCMOS low dropout
regulator architecture enables this unique
and very efficient operating characteristic.
The LX5207 also offers a precisely
trimmed channel output current specified
to a 5% tolerance.
The maximum value
of the output current is trimmed as closely
as possible to the SCSI standard maximum
specification to give the highest possible
noise margin for fast SCSI operation. And
finally, the LX5207 sinks up to 100mA of
current making it compatible with today's
fast active negation drivers.
The LX5207 is a superior, pin-for-pin
replacement for a variety of industry prod-
ucts such as the UC5601, UC5602, UC5608,
and UC5609.
KEY FEA TURES
s 2.5pF OUTPUT CAPACITANCE DURING
DISCONNECT
s 500nA SUPPLY CURRENT IN DISCONNECT
MODE
s 800µA SUPPLY CURRENT DURING NORMAL
OPERATION
s 100mA SINK CURRENT FOR ACTIVE
NEGATION
s LOGIC COMMAND DISCONNECTS ALL
TERMINATION LINES
s CURRENT LIMIT AND THERMAL PROTEC-
TION
s COMPATIBLE WITH SCSI 1, 2, 3, AND
FAST-20 STANDARDS
s HOT SWAP COMPATIBLE
s CONSULT FACTORY FOR APPLICATION
TEST REPORT: 5207TR
FOR FUR THER INFORMA TION CALL (714) 898-8121
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841
1
18-LINE LOW CAPACITANCE, µPOWER SCSI TERMINATOR
P RODUCTION D AT A S HEET
T HE
I NFINITE
P OWER
OF
I NNOV A TION
LX5207
LIN D OC #: 5207
Copyright © 1998
Rev. 1.5
3/98
RECEIVING WAVEFORM - 20MH Z
DRIVING WAVEFORM - 20MH Z
Receiver
LX5207
LX5207
LX5268
LX5268
1 Meter, AWG 28
Driver
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX5207CDWPT)
NOTE:
For An In-Depth
Discussion On Applying
SCSI, Request Linfinity
Application Note:
"Understanding The
Single-Ended SCSI Bus"


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