sip5670 Vishay, sip5670 Datasheet

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sip5670

Manufacturer Part Number
sip5670
Description
9-line Scsi Bus Terminators
Manufacturer
Vishay
Datasheet

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DESCRIPTION
The SiP5670 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 SiP5670 has nine (9) output channels (T1-T9). Each
output channel provides termination for one SCSI data signal,
parity signal or control signal. Two SiP5670 ICs provide
complete termination for a narrow SCSI bus; three ICs provide
complete termination for a wide SCSI bus.
An integrated mode change delay filter in the SiP5670
eliminates the need for a bulky 4.7-mF low pass filter capacitor
to be compliant with SPI-3 mode change timing requirements.
Document Number: 73008
S-41264—Rev. A, 05-Ju1-04
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 Integrated SPI-3 Mode Change Delay Filter
D Differential Failsafe Bias
D Thermal Package
D On-Chip Thermal Shutdown Circuit
D Master/Slave Input
D Active Negation
D Hot Swap Compatible
FUNCTIONAL BLOCK DIAGRAM
MODE
(ULTRA-160) and SPI-4 (ULTRA-320) Standards
21
17
GND
18
10 mA
8
0.7 t V t1.9 = LVD
and Delay Fiilter
Comparators
Mode Control And
Heat Sink GND Pins
9
V u 2.4 = HPD
Enable/Disable
V t 0.5 = S/E
Circuitry
10
26
9-Line SCSI Bus Terminators
27
HPD
28
35
LVD
Current Limited
34
Source/Sink
New Product
Regulator
S/E
33
REG
1
TERMPWR
D Pin Compatible with UCC5670 and UCC5630
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
36
The SiP5670 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 SiP5670 also presents high
impedance to the SCSI bus if the DISABLE pin is asserted, or
if TERMPWR is removed from the IC.
The SiP5670 is available in a lead (Pb)-free QSOP-36
package for operation over the temperature range of 0 to
70 _C.
Impedance
Terminator
1.3 V
Circuits
SCSI
Current Limited
Enable
Source/Sink
Regulator
20
19
32
31
5
4
DIFFS
MSTR/SLV
T1N
T1P
T9N
T9P
See
(Page 6) for detailed descriptions
of SCSI Terminator Impedance
Circuits in LVD and S/E modes of
operation.
Vishay Siliconix
Functional Diagrams
SiP5670
www.vishay.com
1

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sip5670 Summary of contents

Page 1

... D Server and Workstation D Industrial Computers D High-End Personal Computers The SiP5670 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

... HIGH BYTE DATA (8) + PARITY T9N T9P DIFFS GROUND SiP5670 T1N TERMPWR T1P MSTR/SLV DISABLE T9N T9P DIFFS REG 4 GND MODE 0.1 mF 4.7 mF SiP5670 T1N TERMPWR T1P MSTR/SLV DISABLE T9N T9P DIFFS REG 4.7 mF GND MODE SiP5670 T1N TERMPWR T1P MSTR/SLV DISABLE T9N T9P ...

Page 3

... 4 REG = 0 V REG = 4 V − DIFFS DIFFS V = 2.75 V DIFFS 1.2 V DISABLE V u 1.2 V DISABLE SiP5670 Vishay Siliconix −65 to 125 _C 150 Limits Min Typ Max Unit 100 105 110 W W 120 ...

Page 4

... SiP5670 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) Mode Change Delay t DEL MASTER/SLAVE Input Input Threshold p V TH(M/S) TH(M/S) Input Current I IN(M/S) STATUS Output Pins (LVD, S/E and HPD) Source Current I SO(STAT) Sink Current I SI(STAT) THERMAL Shutdown ...

Page 5

... PIN CONFIGURATION AND ORDERING INFORMATION SiP5670 (QSOP-36) REG 1 N/C 2 N/C 3 T1P 4 T1N 5 T2P 6 T2N 7 H/S GND 8 H/S GND 9 H/S GND 10 T3P 11 T3N 12 T4P 13 T4N 14 T5P 15 T5N 16 DISABLE 17 GND 18 Top View PIN DESCRIPTION Pin Name 1 REG SCSI Regulator Output. Connect a 4.7-mF bypass capacitor from this pin to GND. ...

Page 6

... SiP5670 Vishay Siliconix FUNCTIONAL BLOCK DIAGRAM LVD OPERATION Comparators and Delay Filters V t 0.5 = S/E 21 MODE 0 t1.9 = LVD V u 2.4 = HPD 10 mA Mode Control And Enable/Disable 17 DISABLE Circuitry FUNCTIONAL BLOCK DIAGRAM S/E OPERATION Comparators and Delay Filter V t 0.5 = S/E 21 MODE 0 t1.9 = LVD V u 2.4 = HPD 10 mA Mode Control And ...

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: 73008 S-41264—Rev. A, 05-Ju1-04 New Product TEMPWR = 2.70 V TEMPWR = 2. ns/div SiP5670 Vishay Siliconix 5 ns/div www.vishay.com 7 ...

Page 8

... SiP5670 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

... SiP5670 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

... SiP5670 is in disconnect mode. The DISABLE pin is used to connect/disconnect the SiP5670 pulled to GROUND the SiP5670 is in connect mode, and operates as a terminator pulled to TERMPWR 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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