LX5261 Datasheet, PDF (1/6 Pages) Microsemi Corporation – 27-Line LVD SCSI Source/Sink Regulator

LX5261
TM
®
27-Line LVD SCSI Source/Sink Regulator
PRODUCTION DATASHEET
DESCRIPTION
The LX5261 is a source/sink
regulator designed to provide the
correct reference voltages and bias
currents for SCSI LVD applications.
With the proper LVD termination
network (475Ω, 121Ω, 475Ω), the
LX5261 assures that LVD performance
is compliant to the SPI-2 (Ultra2), SPI-
3 (Ultra160) and SPI-4 (Ultra320)
specification.
The LX5261 provides two fixed
regulated outputs (1.75V and 0.75V)
each capable of sourcing / sinking
200mA, along with a buffered 1.3V
output for DIFSENS signaling.
The LX5261 features on-chip
trimming of the internal voltage enabling
precise output voltages; typically +/- 1%
of its specified value. Thermal Shutdown
and Current Limiting is integrated on-
chip.
The LX5261 is available in the 16-
pin SOIC (DP) package.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
ƒ Compliant with SPI-2 (Ultra2),
SPI-3 (Ultra160), and SPI-4
(Ultra320)
ƒ 2.7V to 5.25V Operation
ƒ 200mA Source/Sink Capability
ƒ DIFSENS Line Driver
ƒ Current Limit and Thermal
Protection
ƒ Pin Compatible With Unitrode
UCC561
TYPICAL APPLICATION
VTERM
2.7V to 5.25V
2
4.7uF
1.3V
Reference
1.75V
Reference
GND
4
0.75V
Reference
+ ^{1.3V +/- 0.1V}
-
DIFSENS
7
1.75V +/- 0.05V
+ ^{200mA source/sink}
-
0.75V +/- 0.05V
200mA source/sink
+
-
6 ^VOUT1
4.7uF
3 ^VOUT2
4.7uF
475
1%
L1-
121
1%
475
1%
L1+
27
LVD
475
Pairs
1%
L27-
121
475 ^1%
1%
L27+
Copyright © 2000
Rev. 1.0c, 2005-02-08
PACKAGE ORDER INFO
T_A (°C)
SOIC
DP _16-Pin
RoHS Compliant / Pb-free
Transition DC: 0440
0 to 70
LX5261CDP
Note: Available in Tape & Reel.
Append the letters “TR” to the part number. (i.e. LX5261CDP-TR)
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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