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SIP5630
New Product
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 D D D D D D
Disk Array (RAID) Storage Area Networks (SAN) Network Attached Storage (NAS) SCSI Cable Server and Workstation Industrial Computers 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 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 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 is available in a lead (Pb)-free QSOP-36 package for operation over the temperature range of 0 to 70 _C.
FUNCTIONAL BLOCK DIAGRAM
HPD 35 LVD 34 S/E 33 TERMPWR 36 Current Limited Source/Sink Regulator 1.3 V Enable
20 19
DIFFS MSTR/SLV
Comparators MODE 21 V t 0.5 = S/E 0.7 t V t1.9 = LVD V u 2.4 = HPD
5 Current Limited Source/Sink Regulator 4 SCSI Terminator Impedance Circuits 32 31
T1N T1P
10 mA Mode Control And Enable/Disable Circuitry
T9N T9P See Functional Diagrams (Page 6) for detailed descriptions of SCSI Terminator Impedance Circuits in LVD and S/E modes of operation. www.vishay.com
DISABLE
17
18 GND
8
9
10
26
27
28
1 REG
Heat Sink GND Pins
Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
Vishay Siliconix
TYPICAL APPLICATION DIAGRAM
New Product
SCSI BUS TERMPWR
SIP5630
TERMPWR MSTR/SLV DISABLE T1N T1P DDD T9N T9P REG 4.7 mF GND DIFFS 50 kW MODE DIFFSENS 50 kW 4.7 mF 4.7 mF T1N T1P DDD CONTROL LINES (9) LOW BYTE DATA (8) + PARITY T1N T1P DDD T9N T9P DIFFS
SIP5630
TERMPWR MSTR/SLV DISABLE
REG GND 4.7 mF
MODE
4.7 mF 4.7 mF
SIP5630
TERMPWR MSTR/SLV DISABLE T1N T1P DDD
SIP5630
TERMPWR MSTR/SLV DISABLE
T9N T9P
T9N T9P DIFFS
REG 4.7 mF GND
DIFFS
REG GND 4.7 mF
MODE
MODE
SIP5630
TERMPWR MSTR/SLV DISABLE T1N T1P DDD T9N T9P REG 4.7 mF GND DIFFS MODE GROUND HIGH BYTE DATA (8) + PARITY T1N T1P DDD T9N T9P DIFFS
SIP5630
TERMPWR MSTR/SLV DISABLE
REG GND 4.7 mF
MODE
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Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
SIP5630
New Product
Vishay Siliconix
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 (TA)) . . . . . . . . . . . . . . . . . . . . . . . . 0 to 70 _C
SPECIFICATIONS
Test Conditions Unless Specified Parameter
Differential Impedance Common Mode Impedance Differential Failsafe Bias Common Mode Bias
Limits Mina
100
Symbol
ZDIFF ZCM VDIFF VCM
TERMPWR = 2.7 to 5.25 V, DISABLE = 0 V TA = TJ = 0 to 70 _C
Typb
105 140 112 1.25
Maxa
110 160 125 1.35
Unit
SCSI Channels (T1 to T9), LVD Operation
120 100 1.15 W mV V
MODE = 1 3 V 1.3
SCSI Channels (T1 to T9), S/E Operation
Impedance Bias Voltage Output Current GND Driver Impedance ZS/E VS/E IS/E ZGS MODE = 0 V MODE = 0 V Channel Voltage = 0.2 V Channel Voltage = 0.5 V 100 2.5 -25.4 -22.4 30 60 108 2.7 -23 116 3.0 -20.5 W V mA W
MODE = 0 V, ITEST = 10 mA
SCSI Channels (T1 to T9), Termination Disabled
Channel Leakagec Channel Capacitancec, d IL CT Channel Voltage = 0 to 5 V Referenced to GND -500 0 3 500 nA pF
SCSI Regulator, LVD Mode
Output Voltage Source Current Sink Current REG(LVD) ISO(LVD) ISI(LVD) 0.5 V v VCM v 2.0 Ve REG = 0 V REG = 4 V 1.15 -800 200 1.25 -450 300 1.35 -250 800 V mA
SCSI Regulator, S/E Mode
Output Voltage Source Current Sink Current REG(S/E) ISO(S/E) ISI(S/E) 0.2 V v VCM v 4.0 Vf REG = 0 V REG = 4 V 2.5 -800 200 2.7 -450 300 3.0 -250 800 V mA
DIFFSENS Regulator
Output Voltage Source Current Sink Current VDIFFS ISO(DIFFS) ISI(DIFFS) -5 mA v IDIFFS v 50 mA VDIFFS = 0 V VDIFFS = 2.75 V 1.2 -15 50 1.3 -8 100 1.4 -5 200 V mA mA
DISABLE Input
Input Threshold Input Current VTH(DIS) IIN(DIS) 0 V v VDISABLE v 1.2 V VDISABLE u 1.2 V 0.8 -30 -30 1.0 -10 0 1.2 -3 10 V mA
Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
Vishay Siliconix
SPECIFICATIONS
Test Conditions Unless Specified Parameter MODE Input
S/E to LVD Threshold LVD to HPD Threshold Input Current VTH(S/E) VTH(HPD) IIN(MODE) 0 Vv VMODE v 5.25 V 0.5 1.9 -1 0.6 2.1 0 0.7 2.4 1 V mA
New Product
Limits Mina Typb Maxa Unit
Symbol
TERMPWR = 2.7 to 5.25 V, DISABLE = 0 V TA = TJ = 0 to 70 _C
MASTER/SLAVE Input
TERMPWR = 2.7 V Input Threshold p Input Current VTH(M/S) IIN(M/S) TERMPWR = 3.3 V TERMPWR = 5.25 V 0 Vv VM/S v TERMPWR 0.8 1 1.5 -1 1.4 1.7 2.6 0 1.9 2.3 3.7 1 mA V
STATUS Output Pins (LVD, S/E and HPD)
Source Current Sink Current ISO(STAT) ISI(STAT) TERMPWR = 2.7 V, VPIN = 2.4 V VPIN = 0.4 V 3 -10 6 -5 mA
THERMAL Shutdown
Shutdown Temperatured Hysteresis d TOFF THYS Rising Temperature 160 10 _C
TERMPWR Supply
LVD Mode S/E Mode HPD Mode Disabled Mode IDD(LVD) IDD(S/E) IDD(HPD) IDD(DIS) MODE = 1.3 V, Channels Unloaded MODE = 0 V, Channels Unloaded MODE = 3 V DISABLE = 3 V 20 10 10 500 30 20 20 1000 mA mA
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. e. VCM applied simultaneously to Line PLUS and Line MINUS pins of all SCSI channels T1-T9. f. VCM applied simultaneously to Line MINUS pins of all SCSI channels T1-T9.
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Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
SIP5630
New Product
PIN CONFIGURATION AND ORDERING INFORMATION
Vishay Siliconix
SIP5630 (QSOP-36)
REG N/C N/C T1P T1N T2P T2N H/S GND H/S GND H/S GND T3P T3N T4P T4N T5P T5N DISABLE GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Top View 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 TERMPWR HPD LVD S/E T9N T9P T8N T8P H/S GND H/S GND H/S GND T7N T7P T6N T6P MODE DIFFS MSTR/SLV
ORDERING INFORMATION
Part Number
SIP5630CG-T1--E3
Temperature Range
0 to 70_C
Marking
SIP5630CG
PIN DESCRIPTION
Pin
1 2, 3 4, 6, 11, 13,15, 22, 24, 29, 31 5, 7, 12, 14, 16, 23, 25, 30, 32 8, 9, 10, 26, 27, 28 17 18 19 20 21 33, 34, 35 36
Name
REG N/C TXP; X = 1...9 TXN; X = 1...9 H/S GND DISABLE GND MSTR/SLV DIFFS MODE S/E, LVD, HPD TERMPWR No Connect.
Function
SCSI Regulator Output. Connect a 4.7-mF bypass capacitor from this pin to GND. 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. 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. Heat Sink Ground. Should be connected to as large a grounded heat sink area on the PC board as is practical. 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. Electrical ground connection for the terminator IC. Connect to the ground lines of the SCSI Bus Master/Slave. If this pin is tied to TERMPWR the output of the 1.3-V regulator for DIFFSENS is enabled. If this pin is tied to GND the output of the 1.3-V regulator for DIFFSENS is inhibited. DIFFSENS Regulator Output. Connect to the DIFFSENS line of the SCSI Bus to bias the mode selection function. SCSI MODE Select Pin. Connect to the DIFFSENS line of the SCSI Bus to sense the present mode of operation on the Bus. Decouple MODE from the DIFFSENS signal with a 50-kW/4.7mF low pass filter to meet SPI-3 mode change requirements. Status Output Pins. Respective pins are high when the terminator detects the corresponding mode of operation on the SCSI Bus, and low otherwise. Power for the Terminator IC. Connect to the TERMPWR lines on the SCSI Bus and decouple with a 4.7-mF capacitor to GND at the IC. www.vishay.com
Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
Vishay Siliconix
FUNCTIONAL BLOCK DIAGRAM
New Product
LVD OPERATION
HPD 35 LVD 34 S/E 33 Current Limited Source/Sink Regulator 1.3 V Enable
20 19
DIFFS MSTR/SLV
Comparators MODE 21 V t 0.5 = S/E 0.7 t V t1.9 = LVD V u 2.4 = HPD
Current Limited Source/Sink Regulator 1.25 V
52.5 W 115 W 52.5 W
1.07 mA 5 4 T1N T1P
10 mA Mode Control And Enable/Disable Circuitry 115 W 52.5 W
1.07 mA
DISABLE
17
52.5 W
1.07 mA 32 31 1.07 mA T9N T9P
1 REG
FUNCTIONAL BLOCK DIAGRAM
S/E OPERATION
HPD 35 LVD 34 S/E 33 Current Limited Source/Sink Regulator 1.3 V Enable
20 19
DIFFS MSTR/SLV
Comparators MODE 21 V t 0.5 = S/E 0.7 t V t1.9 = LVD V u 2.4 = HPD
Current Limited Source/Sink Regulator 2.7 V
108 W 30 W
5 4
T1N T1P
10 mA Mode Control And Enable/Disable Circuitry 108 W
DISABLE
17
32 30 W 31
T9N T9P
1 REG www.vishay.com Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
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.
Vishay Siliconix
TEMPWR = 5.25 V
TEMPWR = 2.70 V
0.1 V/div
5 ns/div
0.1 V/div
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
0.5 V/div
50 ns/div
0.5 V/div
50 ns/div
Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
Vishay Siliconix
LVD TYPICAL CHARACTERISTICS
110
New Product
Differential Impedance vs. TERMPWR
0_C 25_C 70_C
110
Differential Impedance vs. Temperature
TERMPWR 5.25 V 3.5 V 2.7 V
108 Differential Impedance (W)
108 Differential Impedance (W)
106
106
104
104
102
102
100 2.5
100 3.0 3.5 4.0 4.5 5.0 5.5 0 10 20 30 40 50 60 70 Temperature (_C)
Differential Fail-Safe Bias vs. TERMPWR
125 0_C 25_C 70_C Differential Bias (mV) 125
Differential Fail-Safe Bias vs. Temperature
TERMPWR 5.25 V 3.5 V 2.7 V
120 Differential Bias (mV)
120
115
115
110
110
105
105
100 2.5
100 3.0 3.5 4.0 4.5 5.0 5.5 0 10 20 30 40 50 60 70 TERMPWR (V) Temperature (_C)
1.30 1.29 1.28 Common Mode Bias (V) 1.27 1.26 1.25 1.24 1.23 1.22 1.21 1.20 2.5
Common Mode Bias vs. TERMPWR
0_C 25_C 70_C
1.30 1.29 1.28 Common Mode Bias (V) 1.27 1.26 1.25 1.24 1.23 1.22 1.21 1.20
Common Mode Bias vs. Temperature
TERMPWR 5.25 V 3.5 V 2.7 V
3.0
3.5
4.0
4.5
5.0
5.5
0
10
20
30
40
50
60
70
TERMPWR (V) www.vishay.com
Temperature (_C) Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
New Product
SE TYPICAL CHARACTERISTICS
116 114 112 Impedance (W) 110 108 106 104 102 100 2.5
Vishay Siliconix
Impedance vs. TERMPWR
0_C 25_C 70_C Impedance (W)
116 114 112 110 108 106 104 102 100
Impedance vs. Temperature
TERMPWR 5.25 V 3.5 V 2.7 V
3.0
3.5
4.0
4.5
5.0
5.5
0
10
20
30
40
50
60
70
TERMPWR (V)
Temperature (_C)
Output Current @ 0.2 V vs. TERMPWR
-20.9 -21.4 -21.9 -22.4 -22.9 -23.4 -23.9 -24.4 -24.9 -25.4 2.5 Current (mA) Current (mA) 0_C 25_C 70_C -20.9 -21.4 -21.9 -22.4 -22.9 -23.4 -23.9 -24.4 -24.9 -25.4 3.0 3.5 4.0 4.5 5.0 5.5 0
Output Current @ 0.2 V vs. Temperature
TERMPWR 5.25 V 3.5 V 2.7 V
10
20
30
40
50
60
70
TERMPWR (V)
Temperature (_C)
3.0
Bias vs. TERMPWR
0_C 25_C 70_C
3.0
Bias vs. Temperature
TERMPWR 5.25 V 3.5 V 2.7 V
2.9
2.9
Bias (V)
2.7
Bias (V)
2.8
2.8
2.7
2.6
2.6
2.5 2.5
2.5 3.0 3.5 4.0 4.5 5.0 5.5 0 10 20 30 40 50 60 70
TERMPWR (V)
Temperature (_C)
Document Number: 73007 S-41263--Rev. A, 05-Ju1-04
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SIP5630
Vishay Siliconix
New Product
DETAILED OPERATION
The SIP5630 is a multimode active terminator IC, which detects the operating mode of the SCSI bus, and switches to the appropriate termination configuration accordingly. Three SIP5630 terminators are required at each end of a wide SCSI bus to terminate 27 lines (18 data, 9 control). In LVD mode the SIP5630 provides 105-W differential impedance and 112-mV differential bias between each T-/T+ pair of terminator lines. In S/E mode the SIP5630 provides 108W- impedance and 2.7-V pull-up on each T- pin, and low impedance to ground on each T+ pin. In HPD mode the SIP5630 disconnects from the bus and presents high impedance to all T-/T+ lines. Each SIP5630 IC has a 1.3-V DIFFSENS Regulator output that can be used to drive the DIFFSENS line of a SCSI bus. Since only one DIFFSENS regulator is required at each end of the SCSI bus each SIP5630 includes a MASTER/SLAVE pin to enable or disable its DIFFSENS regulator. 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 MODE pin senses the operational state of the SCSI bus by detecting the voltage on the DIFFSENS control line through an external R/C low pass filter. 50 kW/4.7 mF are recommended component values for the filter to meet SPI-3 mode change requirements.
Three status lines (S/E, LVD, and HPD) are provided by the SIP5630. One and only one status line is asserted high when its corresponding mode has been detected; the other two status lines are driven low. The mode detection function continues to work even when the SIP5630 is in disconnect mode.
The DISABLE pin is used to connect/disconnect the SIP5630. If it is pulled to GROUND the SIP5630 is in connect mode, and operates as a terminator. If it is pulled to TERMPWR 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 but the mode detection circuitry continues to function and the status lines continue to indicate which mode is detected.
The SIP5630 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.
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Document Number: 73007 S-41263--Rev. A, 05-Ju1-04

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