sip5638 Vishay, sip5638 Datasheet

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sip5638

Manufacturer Part Number
sip5638
Description
Sip5638 - 15-line Scsi Bus Terminators
Manufacturer
Vishay
Datasheet

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Part Number:
sip5638CS-TR-E3
Manufacturer:
Vishay Siliconix
Quantity:
10 000
DISABLE
DESCRIPTION
The SiP5638 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 SiP5638 has fifteen (15) output channels (T1−T15). Each
output channel provides termination for one SCSI data signal,
parity signal or control signal. Two SiP5638 ICs provide
complete termination for a wide SCSI bus.
Document Number: 73098
S-41843—Rev.A, 11-Oct-04
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
D Differential Failsafe Bias
D Thermal Package
D On-Chip Thermal Shutdown Circuit
D Active Negation
D Hot Swap Compatible
FUNCTIONAL BLOCK DIAGRAM
MODE
(ULTRA-160) and SPI-4 (ULTRA-320) Standards
34
36
GND
27
10 mA
4
0.7 t V t1.9 = LVD
Comparators
Mode Control And
V u 2.4 = HPD
Enable/Disable
Heat Sink GND Pins
V t 0.5 = S/E
9
Circuitry
15-Line SCSI Bus Terminators
28
33
TERMPWR
Current Limited
3
Source/Sink
New Product
Regulator
REG
10
D Pin Compatible with UCC5638
D Lead (Pb)-Free SQFP-48 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
The SiP5638 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 SiP5638 also presents high
impedance to the SCSI bus if the DISABLE pin is asserted, or
if TERMPWR is removed from the IC.
The SiP5638 is available in a lead (Pb)-free SQFP-48
package for operation over the temperature range of 0 to
70 _C.
Impedance
Terminator
1.3 V
Circuits
SCSI
Current Limited
Source/Sink
Regulator
35
48
47
2
1
DIFFS
T1N
T1P
T15N
T15P
See
(Page 6) for detailed descriptions
of SCSI Terminator Impedance
Circuits in LVD and S/E modes of
operation.
Vishay Siliconix
Functional Diagrams
SiP5638
www.vishay.com
1

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sip5638 Summary of contents

Page 1

... D Server and Workstation D Industrial Computers D High-End Personal Computers The SiP5638 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 ...

Page 2

... DIFFSENS DIFFS 50 kW T1N T1P Group 2 Signals T13N T13P DIFFS GROUND SiP5638 T1N TERMPWR T1P DISABLE T14N T14P DIFFS REG 4 GND MODE 4.7 mF 4.7 mF SiP5638 T1N TERMPWR T1P DISABLE T13N T13P DIFFS REG 4.7 mF GND MODE Document Number: 73098 S-41843—Rev.A, 11-Oct-04 ...

Page 3

... REG REG − DIFFS DIFFS V = 2.75 V DIFFS 1.2 V DISABLE V u 1.2 V DISABLE SiP5638 Vishay Siliconix −65 to 125 _C 150 Limits Min Typ Max Unit 100 105 110 W W 120 140 ...

Page 4

... SiP5638 Vishay Siliconix SPECIFICATIONS Parameter Symbol MODE Input S/E to LVD Threshold V TH(S/E) LVD to HPD Threshold V TH(HPD) Input Current I IN(MODE) THERMAL Shutdown d Shutdown Temperature T OFF d Hysteresis T HYS TERMPWR Supply LVD Mode I DD(LVD) S/E Mode I DD(S/E) HPD Mode I DD(HPD) Disabled Mode I DD(DIS) Notes a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum is used in this data sheet. ...

Page 5

... SCSI regulator and DIFFSENS regulator are both disabled. Document Number: 73098 S-41843—Rev.A, 11-Oct-04 New Product SiP5638 (SQFP-48 Top View ORDERING INFORMATION Temperature Range ...

Page 6

... SiP5638 Vishay Siliconix FUNCTIONAL BLOCK DIAGRAM LVD OPERATION Comparators V t 0.5 = S/E 34 MODE 0 t1.9 = LVD V u 2.4 = HPD 10 mA Mode Control And Enable/Disable 36 DISABLE Circuitry FUNCTIONAL BLOCK DIAGRAM S/E OPERATION Comparators V t 0.5 = S/E 34 MODE 0 t1.9 = LVD V u 2.4 = HPD 10 mA Mode Control And Enable/Disable 36 DISABLE Circuitry www.vishay.com ...

Page 7

... Mbyte/sec data transfer. Top panel DB10 T- and T+ signals. Bottom panel DB9 T− and T+ signals. All bits except DB9 toggling at maximum data rate. TEMPWR = 5. ns/div S/E WAVEFORMS 40 Mbyte/sec data transfer. Top panel DB10 T- signals. Bottom panel DB9 T− signals. TEMPWR = 5. ns/div Document Number: 73098 S-41843—Rev.A, 11-Oct-04 New Product TEMPWR = 2.70 V TEMPWR = 2. ns/div SiP5638 Vishay Siliconix 5 ns/div www.vishay.com 7 ...

Page 8

... SiP5638 Vishay Siliconix LVD TYPICAL CHARACTERISTICS Differential Impedance vs. TERMPWR 110 0_C 108 25_C 70_C 106 104 102 100 2.5 3.0 3.5 4.0 Differential Fail-Safe Bias vs. TERMPWR 125 0_C 120 25_C 70_C 115 110 105 100 2.5 3.0 3.5 4.0 TERMPWR (V) Common Mode Bias vs. TERMPWR 1.30 1.29 0_C 25_C 1.28 70_C 1.27 1.26 1.25 1.24 1.23 1.22 1.21 1.20 2.5 3.0 3.5 4.0 TERMPWR (V) www.vishay.com ...

Page 9

... SiP5638 Vishay Siliconix Impedance vs. Temperature TERMPWR 5.25 V 3 Temperature (_C) Output Current @ 0.2 V vs. Temperature TERMPWR 5.25 V 3 Temperature (_C) Bias vs. Temperature 3 ...

Page 10

... SPI-3 mode change requirements. The DISABLE pin is used to connect/disconnect the SiP5638 pulled to GROUND the SiP5638 is in connect mode, and operates as a terminator pulled to TRMPWR or left open the device is in disconnect mode and presents high impedance to the SCSI bus ...

Page 11

... Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right ...

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