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LX5255 Datasheet(PDF) 1 Page - Microsemi Corporation

Part # LX5255
Description  9-Line LVD SCSI Terminator
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

LX5255 Datasheet(HTML) 1 Page - Microsemi Corporation

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Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
 2000
Rev. 1.0a, 2003-06-30
LX5255
9-Line LVD SCSI Terminator
PRODUCTION DATA SHEET
I N T E GRA T ED
PR ODUC T S
DESCRIPTION
The LX5255 is a Low Voltage
Differential
(LVD)
terminator
designed to comply with the LVD
termination specification in the SPI-4
document. The LX5255 is specifically
designed for LVD only applications.
Because the LX5255 supports only
LVD, it has lower output capacitance
than multimode terminators such as
the LX5250.
The LX5255 utilizes an industry
standard
LVD
architecture.
The
individual high bandwidth drivers
maximize channel separation, reduce
channel-to-channel noise and cross
talk to insure Ultra320 performance.
When the LX5255 is enabled, the
Differential Sense (DIFSENS) pin
supplies a voltage between 1.2V and
1.4V. In application, the terminator
DIFFB input is connected to the system
DIFSENS line. If there are no single
ended or High Voltage Differential
(HVD) devices attached to the system,
the LVD output will be enabled. If the
DIFSENS line is LOW, indicating a
single ended device, the LX5255 output
will be HiZ. If the DIFSENS line is
HIGH, indicating a HVD device, the
LX5255 output will be HiZ.
The LX5255 has a TTL compatible
sleep/disable mode. Applying a logic
HIGH to the DISC pin puts the LX5255
in sleep mode. During sleep mode,
power dissipation is reduced to a meager
5µA while also placing all outputs and
the DIFSENS function in a HiZ state.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATUR ES
Compliant with SPI-2 (Ultra2),
SPI-3 (Ultra160), and SPI-4
(Ultra320)
2.5pF Maximum Disabled Output
Capacitance
Fast Response, No External
Capacitors Required
5µA Supply Current in Disconnect
Mode
30mA Supply During Normal
Operation
Logic Command Disconnects All
Termination Lines
DIFSENS Line Driver
Current Limit and Thermal
Protection
Pin Compatible With Unitrode
UCC5640
TY PICAL APPLICATION
LX 5255
LX 5255
+
-
+
-
LX5255 Typical Application
PACKAGE ORDER INFO
TA (°C)
PW
TSSOP
24-Pin
0 to 70
LX5255CPW
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e.
LX5255CPWT)


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