73007 Datasheet, PDF (1/10 Pages) Vishay Siliconix – 9-Line SCSI Bus Terminators

New Product
SiP5630
Vishay Siliconix
9-Line SCSI Bus Terminators
FEATURES
D Auto Selection of S/E or LVD SCSI Termination
D 2.7-V to 5.25-V TERMPWR Range
D Meets SCSI-1, SCSI-2, SPI-2 (ULTRA-2), SPI-3
(ULTRA-160) and SPI-4 (ULTRA-320) Standards
D Differential Failsafe Bias
D Thermal Package
D On-Chip Thermal Shutdown Circuit
D Master/Slave Input
D Active Negation
D Hot Swap Compatible
D Pin Compatible with UCC5630 and UCC5670
D Lead (Pb)-Free QSOP-36 Package
APPLICATIONS
D Disk Array (RAID)
D Storage Area Networks (SAN)
D Network Attached Storage (NAS)
D SCSI Cable
D Server and Workstation
D Industrial Computers
D High-End Personal Computers
DESCRIPTION
The SiP5630 provides active bus termination suitable for all
SCSI bus operational modes from SCSI-1 through SPI-4
(Ultra 320). The termination includes impedance matching of
the SCSI bus to minimize signal reflections from the end of the
bus, as well as required SCSI bus biasing for either S/E (Single
Ended) or LVD (Low Voltage Differential) operation.
The SiP5630 has nine (9) output channels (T1-T9). Each
output channel provides termination for one SCSI data signal,
parity signal or control signal. Two SiP5630 ICs provide
complete termination for a narrow SCSI Bus; three ICs provide
complete termination for a wide SCSI bus.
The SiP5630 senses the operational state of the SCSI bus via
the DIFFSENS bus signal, and automatically switches to S/E
or LVD operation as required. It cannot be used on an HPD
(High Power Differential) SCSI bus, and goes into high
impedance mode when the voltage on the DIFFSENS line
indicates HPD operation. The SiP5630 also presents high
impedance to the SCSI bus if the DISABLE pin is asserted, or
if TERMPWR is removed from the IC.
The SiP5630 is available in a lead (Pb)-free QSOP-36
package for operation over the temperature range of 0 to
70 _C.
FUNCTIONAL BLOCK DIAGRAM
MODE ²¹
Comparators
V t 0.5 = S/E
0.7 t V t1.9 = LVD
V u 2.4 = HPD
10 mA
HPD LVD
35
34
S/E TERMPWR
33
36
Current Limited
Source/Sink
Regulator
1.3 V
Enable
20 _DIFFS
19 _MSTR/SLV
Current Limited
Source/Sink
Regulator
SCSI
Terminator
Impedance
Circuits
5 _T1N
4 _T1P
DISABLE 17
Mode Control And
Enable/Disable
Circuitry
18
GND
8 9 10 26 27 28
Heat Sink GND Pins
1
REG
32 _T9N
31 _T9P
See Functional Diagrams
(Page 6) for detailed descriptions
of SCSI Terminator Impedance
Circuits in LVD and S/E modes of
operation.
Document Number: 73007
S-41263—Rev. A, 05-Ju1-04
www.vishay.com
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