sip5678 Vishay, sip5678 Datasheet

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sip5678

Manufacturer Part Number
sip5678
Description
15-line Scsi Bus Terminators
Manufacturer
Vishay
Datasheet

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Part Number:
sip5678CS-TR-E3
Manufacturer:
Vishay Siliconix
Quantity:
10 000
DISABLE
DESCRIPTION
The SiP5678 provides active bus termination suitable for all
SCSI bus operational modes from SCSI-1 through SPI-4 (Ultra
SCSI 320). The termination includes impedance matching of
the Ultra 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 SiP5678 has fifteen (15) output channels (T1−T15). Each
output channel provides termination for one SCSI data signal,
parity signal or control signal. Two SiP5678 ICs provide
complete termination for a wide SCSI bus.
An integrated mode change delay filter in the SiP5678
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: 73100
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 Integrated SPI-3 Mode Change Delay Filter
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
Delay Filter
Mode Control And
V u 2.4 = HPD
Enable/Disable
Heat Sink GND Pins
V t 0.5 = S/E
and
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 SiP5678 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 SiP5678 also presents high
impedance to the SCSI bus if the DISABLE pin is asserted, or
if TERMPWR is removed from the IC.
The SiP5678 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
SiP5678
www.vishay.com
1

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sip5678 Summary of contents

Page 1

... D Server and Workstation D Industrial Computers D High-End Personal Computers The SiP5678 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 20 kW T1N T1P Group 2 Signals T13N T13P DIFFS GROUND SiP5678 T1N TERMPWR T1P DISABLE T14N T14P DIFFS REG 4 GND MODE 0.1 mF 4.7 mF SiP5678 T1N TERMPWR T1P DISABLE T13N T13P DIFFS REG 4.7 mF GND MODE Document Number: 73100 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 SiP5678 Vishay Siliconix −65 to 125 _C 150 Limits Min Typ Max Unit 100 105 110 W W 120 140 ...

Page 4

... SiP5678 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 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 ...

Page 5

... SCSI regulator and DIFFSENS regulator are both disabled. Document Number: 73100 S-41843—Rev. A, 11-Oct-04 New Product SiP5678 (SQFP-48 Top View ORDERING INFORMATION Temperature Range ...

Page 6

... SiP5678 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: 73100 S-41843—Rev. A, 11-Oct-04 New Product TEMPWR = 2.70 V TEMPWR = 2. ns/div SiP5678 Vishay Siliconix 5 ns/div www.vishay.com 7 ...

Page 8

... SiP5678 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

... SiP5678 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

... This mode change delay is implemented in accordance with SCSI standards SPI-3 and higher. The DISABLE pin is used to connect/disconnect the SiP5678 pulled to GROUND the SiP5678 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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