UCC561 Datasheet, PDF (1/8 Pages) Texas Instruments – Low Voltage Differential SCSI LVD 27 Line Regulator Set

UCC561
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SLUS413B -- MAY 1999 -- REVISED NOVEMBER 2002
LOW-VOLTAGE DIFFERENTIAL SCSI (LVD)
27-LINE REGULATOR SET
FEATURES
D SCSI SPI--2, SPI--3 and SPI--4 LVD SCSI
27-Line, Low-Voltage Differential Regulator
D 2.7-V to 5.25-V Operation
D Integrated Regulator Set for LVD SCSI
D Differential Failsafe Bias
APPLICATIONS
D Servers
D Workstations
D RAID Boxes
DESCRIPTION
The UCC561 low-voltage differential (LVD) regulator
set is designed to provide the correct references
voltages and bias currents for LVD termination resistor
networks (475 9, 121 9, and 475 9). The device also
provides a 1.3-V output for “diff sense” signaling. With
the proper resistor network, the UCC561 solution meets
the common mode bias impedance, differential bias,
and termination impedance requirements of SPI--2
(Ultra2), SPI--3 (Ultra3/Ultra160) and SPI--4 (Ultra320).
The UCC561 is not intended for SPI--5 applications.
This device incorporates into a single monolith, two
sink/source reference voltage regulators, a 1.3-V
buffered output and protection features. The protection
features include thermal shutdown and active
current-limiting circuitry. The UCC561 is offered in
16-pin SOIC (DP) package.
TRMPWR ²
2.7 V TO 5.25 V
4
PGND
REF 1.3 V
1.3 V ±100 mV
REF 1.75 V
7 DIFSENS
6 REG1
1.75 V ±50 mV
200 mA SOURCE/SINK
SOURCE/SINK REGULATOR
REF 0.75V
3 REG2
0.75 V ±50 mV
200 mA SOURCE/SINK
UDG--98093
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright ã 2002, Texas Instruments Incorporated