SIP5678 [VISHAY]

15-Line SCSI Bus Terminators; 15线SCSI总线终端


型号：	SIP5678
厂家：	VISHAY
描述：	15-Line SCSI Bus Terminators 15线SCSI总线终端
文件：	总11页 (文件大小：118K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SiP5678

Vishay Siliconix

New Product

15-Line SCSI Bus Terminators

D Pin Compatible with UCC5638

FEATURES

D Auto Selection of S/E or LVD SCSI Termination

D Lead (Pb)-Free SQFP-48 Package

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 Integrated SPI-3 Mode Change Delay Filter

APPLICATIONS

D Disk Array (RAID)

D Storage Area Networks (SAN)

D Network Attached Storage (NAS)

D SCSI Cable

D Differential Failsafe Bias

D Thermal Package

D On-Chip Thermal Shutdown Circuit

D Active Negation

D Server and Workstation

D Industrial Computers

D Hot Swap Compatible

D High-End Personal Computers

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 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 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.

The SiP5678 is available in a lead (Pb)-free SQFP-48

package for operation over the temperature range of 0 to

70 _C.

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.

FUNCTIONAL BLOCK DIAGRAM

TERMPWR

Current Limited

Source/Sink

Regulator

1.3 V

DIFFS

Comparators

and

Delay Filter

MODE

V t 0.5 = S/E

0.7 t V t1.9 = LVD

V u 2.4 = HPD

T1N

T1P

Current Limited

Source/Sink

Regulator

SCSI

Terminator

Impedance

Circuits

10 mA

T15N

T15P

Mode Control And

Enable/Disable

Circuitry

DISABLE

See Functional Diagrams

(Page 6) for detailed

descriptions of SCSI Terminator

Impedance Circuits in LVD and

S/E modes of operation.

GND

Heat Sink GND Pins

REG

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

New Product

Vishay Siliconix

TYPICAL APPLICATION DIAGRAM

SCSI BUS

TERMPWR

SiP5678

T1N

T1P

TERMPWR

T1P

Group 1 Signals

DIFFSENS

DISABLE

T14N

DISABLE

T14N

T14P

DIFFS

REG

GND

REG

GND

4.7 mF

20 kW

MODE

0.1 mF

4.7 mF

SiP5678

T1N

T1P

T1N

T1P

TERMPWR

Group 2 Signals

DISABLE

T13N

T13P

T13N

T13P

DIFFS

MODE

DIFFS

MODE

REG

GND

REG

GND

4.7 mF

GROUND

Group 1 Signals:

DB(0), DB(1), DB(2), DB(3), DB(4), DB(5), DB(6), DB(7), DB(P), DB(12), DB(13), DB(14), DB(15), DB(P1)

Group 2 Signals:

ATN, BSY, ACK, RST, MSG, SEL, C/D, REQ, I/O, DB(8), DB(9), DB(10), DB(11)

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

Vishay Siliconix

New Product

ABSOLUTE MAXIMUM RATINGS (ALL VOLTAGES REFERENCED TO GND = 0 V)

TERMPWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V

TXN, TXP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to 6 V

MODE, DISABLE, M/S, STATUS . . . . . . . . . . . . . . . . . . . . . . . . . . −0.3 to 6 V

Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65 to 125 _C

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 _C

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation

of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating

conditions for extended periods may affect device reliability.

RECOMMENDED OPERATING RANGE (ALL VOLTAGES REFERENCED TO GND = 0 V)

TERMPWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7 V to 5.25 V

Operating Temperature Range (T

)

. . . . . . . . . . . . . . . . . . . . . . . . 0 to 70 _C

SPECIFICATIONS

Test Conditions Unless Specified

Limits

TERMPWR = 2.7 to 5.25 V, DISABLE = 0 V

Parameter

Symbol

Min^a

Typ^bMax^a

Unit

= T = 0 to 70 _C

SCSI Channels (T1 to T15), LVD Operation

Differential Impedance

Common Mode Impedance

Differential Failsafe Bias

Common Mode Bias

100

120

100

1.15

105

140

112

110

160

125

1.35

DIFF

MODE = 1.3 V

DIFF

1.25

SCSI Channels (T1 to T15), S/E Operation

Impedance

100

2.5

108

2.7

116

3.0

S/E

MODE = 0 V

Bias Voltage

Channel Voltage = 0.2 V

Channel Voltage = 0.5 V

= 10 mA

TEST

−25.4

−22.4

−23

−20.5

Output Current

MODE = 0 V

MODE = 0 V, I

S/E

GND Driver Impedance

SCSI Channels (T1 to T15), Termination Disabled

Channel Leakage

Channel Voltage = 0 to 5 V

Referenced to GND

−500

500

c, d

Channel Capacitance

SCSI Regulator, LVD Mode

Output Voltage

Source Current

Sink Current

0.5 V v V

v 2.0 V

1.15

−1000

200

1.25

−600

400

1.35

−400

700

REG(LVD)

= 0 V

SO(LVD)

REG

= 4 V

SI(LVD)

SCSI Regulator, S/E Mode

Output Voltage

Source Current

Sink Current

0.2 V v V

v 4.0 V

2.5

−1000

200

2.7

−600

400

3.0

−400

700

REG(S/E)

= 0 V

SO(S/E)

REG

= 4 V

SI(S/E)

DIFFSENS Regulator

Output Voltage

Source Current

Sink Current

−5 mA v I

v 50 mA

1.2

−15

1.3

−8

1.4

−5

DIFFS

= 0 V

SO(DIFFS)

DIFFS

= 2.75 V

100

200

SI(DIFFS)

DISABLE Input

Input Threshold

0.8

−30

1.0

−10

1.2

−3

TH(DIS)

0 V v V

v 1.2 V

DISABLE

Input Current

IN(DIS)

u 1.2 V

DISABLE

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

New Product

Vishay Siliconix

SPECIFICATIONS

Test Conditions Unless Specified

Limits

TERMPWR = 2.7 to 5.25 V, DISABLE = 0 V

Parameter

Symbol

Min^a

Typ^bMax^a

Unit

= T = 0 to 70 _C

MODE Input

S/E to LVD Threshold

LVD to HPD Threshold

Input Current

0.5

1.9

−1

0.6

2.1

0.7

2.4

TH(S/E)

TH(HPD)

0 Vv V

v 5.25 V

IN(MODE)

MODE

Mode Change Delay

100

200

400

DEL

THERMAL Shutdown

Shutdown Temperature

Rising Temperature

160

OFF

HYS

Hysteresis

TERMPWR Supply

LVD Mode

MODE = 1.3 V, Channels Unloaded

MODE = 0 V, Channels Unloaded

MODE = 3 V

DD(LVD)

S/E Mode

DD(S/E)

HPD Mode

Disabled Mode

DD(HPD)

DISABLE = 3 V

500

1000

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.

b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.

c. MODE = 3 V and/or DISABLE = 3 V and/or TERMPWR = 0 V.

d. Guaranteed by design, not subject to production test.

applied simultaneously to Line PLUS and Line MINUS pins of all SCSI channels T1-T15.

applied simultaneously to Line MINUS pins of all SCSI channels T1-T15.

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

Vishay Siliconix

New Product

PIN CONFIGURATION AND ORDERING INFORMATION

1211 10 9 8 7 6 5 4 3 2 1

T3P

T3N

T15N

T15P

T14N

T14P

T13N

T13P

T12N

T12P

T11N

T11P

T10N

T10P

T4P

T4N

T5P

T5N

T6P

T6N

T7P

T7N

T8P

T8N

SiP5678 (SQFP-48)

Top View

252627282930313233343536

ORDERING INFORMATION

Part Number

Temperature Range

Marking

SiP5678CS-TR—E3

0 to 70_C

SiP5678CS

PIN DESCRIPTION

Name

Function

1, 11, 13, 15, 17,

19, 21, 23, 25, 37,

39, 41, 43, 45, 47

Positive terminator channel pins. Provide positive signal line termination in LVD operation, and are connected to GND

through low impedance in S/E operation. In HPD, DISABLE, or power off condition these pins present high

impedance to the SCSI bus.

TXP; X = 1...15

TXN; X = 1...15

2, 12, 14, 16, 18,

20, 22, 24,26, 38,

40, 42, 44, 46, 48

Negative terminator channel pins. Provide negative signal line termination in LVD operation, and line termination for

S/E operation. In HPD, DISABLE, or power off condition these pins present high impedance to the SCSI bus.

Power for the terminator IC. Connect to the TERMPWR lines on the SCSI bus and decouple with a 4.7-mF capacitor

TERMPWR

H/S GND

to GND at the IC.

4, 5, 6, 7, 8, 9, 28,

29, 30, 31, 32, 33

Heat sink ground. Should be connected to as large a grounded heat sink area on the PC board as is practical.

REG

GND

SCSI regulator output. Connect a 4.7-mF bypass capacitor from this pin to GND.

Electrical ground connection for the terminator IC. Connect to the ground lines of the SCSI Bus

SCSI MODE select pin. Connect to the DIFFSENS line of the SCSI bus to sense the present mode of operation on

the bus. An internal time delay filter is provided but it is recommended to decouple MODE from the DIFFSENS signal

with a 20-kW/0.1-mF anti-aliasing filter for reliable operation in noisy environments.

MODE

DIFFS

DIFFSENS regulator output. Connect to the DIFFSENS line of the SCSI bus to bias the mode selection function.

Chip disable. There is a small (nominal 10 mA) pull up current on this pin. Pull this pin to GND to enable bus

termination. When this pin is left floating or pulled high all SCSI channel pins present high impedance to the SCSI bus,

and the SCSI regulator and DIFFSENS regulator are both disabled.

DISABLE

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

New Product

Vishay Siliconix

FUNCTIONAL BLOCK DIAGRAMꢀLVD OPERATION

Current Limited

Source/Sink

Regulator

1.3 V

DIFFS

Comparators

V t 0.5 = S/E

MODE

0.7 t V t1.9 = LVD

V u 2.4 = HPD

1.07 mA

Current Limited

Source/Sink

Regulator

52.5 W

T1N

T1P

115 W

1.25 V

1.07 mA

10 mA

Mode Control And

Enable/Disable

Circuitry

DISABLE

52.5 W

115 W

T15N

T15P

1.07 mA

REG

FUNCTIONAL BLOCK DIAGRAMꢀS/E OPERATION

Current Limited

Source/Sink

Regulator

1.3 V

DIFFS

Comparators

V t 0.5 = S/E

MODE

0.7 t V t1.9 = LVD

V u 2.4 = HPD

Current Limited

Source/Sink

Regulator

108 W

T1N

T1P

2.7 V

30 W

10 mA

Mode Control And

Enable/Disable

Circuitry

T15N

T15P

DISABLE

REG

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

Vishay Siliconix

New Product

LVD WAVEFORMS

160 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 = 5.25 V

TEMPWR = 2.70 V

5 ns/div

S/E WAVEFORMS

40 Mbyte/sec data transfer. Top panel DB10 T- signals. Bottom panel DB9 T− signals.

TEMPWR = 5.25 V

TEMPWR = 2.70 V

50 ns/div

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

New Product

Vishay Siliconix

LVD TYPICAL CHARACTERISTICS

Differential Impedance vs. TERMPWR

Differential Impedance vs. Temperature

110

108

106

104

102

100

TERMPWR

0_C

5.25 V

3.5 V

2.7 V

108

106

104

102

100

25_C

70_C

2.5

3.0

3.5

4.0

4.5

5.0

5.5

Temperature (_C)

Differential Fail-Safe Bias vs. TERMPWR

Differential Fail-Safe Bias vs. Temperature

125

120

115

110

105

100

TERMPWR

0_C

5.25 V

3.5 V

2.7 V

120

115

110

105

100

25_C

70_C

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TERMPWR (V)

Temperature (_C)

Common Mode Bias vs. TERMPWR

Common Mode Bias vs. Temperature

1.30

1.29

1.28

1.27

1.26

1.25

1.24

1.23

1.22

1.21

1.20

1.30

1.29

1.28

1.27

1.26

1.25

1.24

1.23

1.22

1.21

1.20

0_C

25_C

70_C

TERMPWR

5.25 V

3.5 V

2.7 V

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TERMPWR (V)

Temperature (_C)

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

Vishay Siliconix

New Product

SE TYPICAL CHARACTERISTICS

Impedance vs. TERMPWR

Impedance vs. Temperature

116

114

112

110

108

106

104

102

100

TERMPWR

5.25 V

0_C

114

25_C

70_C

3.5 V

2.7 V

112

110

108

106

104

102

100

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TERMPWR (V)

Temperature (_C)

Output Current @ 0.2 V vs. TERMPWR

Output Current @ 0.2 V vs. Temperature

−20.9

−21.4

−21.9

−22.4

−22.9

−23.4

−23.9

−24.4

−24.9

−25.4

−20.9

−21.4

−21.9

−22.4

−22.9

−23.4

−23.9

−24.4

−24.9

−25.4

TERMPWR

0_C

25_C

70_C

5.25 V

3.5 V

2.7 V

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TERMPWR (V)

Temperature (_C)

Bias vs. TERMPWR

Bias vs. Temperature

3.0

2.9

2.8

2.7

2.6

2.5

3.0

2.9

2.8

2.7

2.6

2.5

TERMPWR

0_C

25_C

70_C

5.25 V

3.5 V

2.7 V

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TERMPWR (V)

Temperature (_C)

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

SiP5678

New Product

Vishay Siliconix

DETAILED OPERATION

The SiP5678 is a multimode active terminator IC, which

detects the operating mode of the SCSI bus, and switches to

the appropriate termination configuration accordingly.

is an integrated 200-ms glich filter on the MODE input for

reliable operation in a noisy environments.

On power up, the SiP5678 initially defaults to a high

impedance state on the termination pins. If the MODE pin

detects S/E or LVD level on the DIFFSENS signal of the SCSI

bus the SiP5678 will wait a standard delay (200 ms typical)

before changing its operating mode. During regular operation

if the MODE pin detects another bus mode change the

SiP5678 again waits a standard delay before changing its

operating mode. This mode change delay is implemented in

accordance with SCSI standards SPI-3 and higher.

Two SiP5678 terminators are required at each end of a wide

SCSI bus to terminate 27 lines (18 data, 9 control). In LVD

mode the SiP5678 provides 105-W differential impedance and

112-mV differential bias between each TN/TP pair of

terminator lines. In S/E mode the SiP5678 provides 108-W

impedance and 2.7-V pull-up on each TxN pin, and low

impedance to ground on each TxP pin. In HPD mode the

SiP5678 disconnects from the bus and presents high

impedance to all TN/TP lines.

The DISABLE pin is used to connect/disconnect the SiP5678.

If it is pulled to GROUND the SiP5678 is in connect mode, and

operates as a terminator. If it is pulled to TRMPWR or left open

the device is in disconnect mode and presents high

impedance to the SCSI bus. In disconnect mode the

DIFFSENS regulator is disabled.

Each SiP5678 IC has a 1.3-V DIFFSENS regulator output that

can be used to drive the DIFFSENS line of a SCSI bus. The

DIFFSENS regulator attempts to drive the DIFFSENS control

signal to 1.3 V, but is current limited so that S/E or HPD devices

on the SCSI bus can override the DIFFSENS regulator and put

the bus into S/E or HPD mode of operation.

The SiP5678 operates within SCSI specifications with the

TERMPWR voltage between 2.7 V and 5.25 V, which enables

it to operate in both 5-V and 3.3-V systems. The 2.7-V lower

limit guarantees correct performance in a 3.3-V system.

The MODE pin senses the operational state of the SCSI bus

by detecting the voltage on the DIFFSENS control line. There

Vishay Siliconix maintains worldwide manufacturing capability. Products may be manufactured at one of several qualified locations. Reliability data for Silicon Technology and

Package Reliability represent a composite of all qualified locations. For related documents such as package/tape drawings, part marking, and reliability data, see

http://www.vishay.com/ppg?73100.

Document Number: 73100

S-41843—Rev. A, 11-Oct-04

www.vishay.com

Legal Disclaimer Notice

Vishay

Notice

Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,

or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.

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.

The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.

Customers using or selling these products for use in such applications do so at their own risk and agree to fully

indemnify Vishay for any damages resulting from such improper use or sale.

Document Number: 91000

Revision: 08-Apr-05

www.vishay.com

SIP5678 [VISHAY]

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SIP6332R18D3-TR1

SIP6332R20D1-TR

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