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VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7124
Features
* ANSI X3T11 Fibre Channel Compliant at 1.0625Gb/s * IEEE 802.3z Gigabit Ethernet Compliant at 1.25Gb/s * Five Port Bypass Circuits (PBCs) * On-Chip Transmit Termination
Quad Port Bypass Circuit
* 3.3V, 0.25W Typical Power * 0.35um CMOS, a Velocity Family Member * 44-Pin, 10mm PQFP Package
General Description
The VSC7124 contains five cascaded Port Bypass Circuits (PBCs) used to steer serial signals. This part is typically used in distributing Fibre Channel signals to an array of disk drives in an FC-AL loop as illustrated in Figure 1. The VSC7124 can be used with any of the Vitesse JBOD circuits to implement FC-AL JBODs of virtually any size. In Figure 1, the first VSC7127's CRU is configured as a Repeater to attenuate jitter. The VSC7124 does not contain a CRU in order to reduce power and cost. The second VSC7127's CRU is configured as a retimer so that the output of the device is a jitter compliance point. Each PBC is a multiplexer that is controlled by the corresponding SELx line which, if HIGH, selects the external input or, if LOW, selects the output of the previous PBC.
VSC7124 Block Diagram
O1+ O1I1+ I1SEL1 O2+ O2I2+ I2SEL2 O3+ O3I3+ I3SEL3 O4+ O4I4+ I4SEL4 O0+ O0I0+ I0SEL0
1 0
1 0
1 0
1 0
1 0
PBC1
PBC2
PBC3
PBC4
PBC0
G52293-0, Rev 2.3 05/07/01
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
Page 1
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
Quad Port Bypass Circuit
VSC7124
Application Example
A 12-port JBOD is shown in Figure 1. This dual loop application uses one VSC7127R, one VSC7127T and one VSC7124 on each loop in order to configure the FC-AL disk array. Functional drives are included in the FCAL loop while nonfunctional or missing drives (numbers 2, 7, 9) are excluded.
Figure 1: 12-Drive FC-AL JBOD Application
Optics or Copper
1
LOOP A
Retimer
0 1
Retimer
0 1 0
VSC7127T #6
7125 SerDes 7125 SerDes
1
VSC7127T #5
0
1
2
7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes
0
1
4
VSC7121 QUAD PORT BYPASS CIRCUIT
0
1
3 4
0
1
3 0 1
CONFIGURATION: VSC7127R #1 & 2: Repeater Mode SEL0=1, SEL5=1 MODE=0 VSC7124 #3 & 4: No CRU VSC7127T #5 & 6: Retimer Mode SEL1=1, SEL5=1 MODE=1
0
1 1 0
2
0 4
1
5 6
0
1
VSC7124 #4
0
1
VSC7124 #3
0
1
3
0
1
7
7125 SerDes 7125 SerDes
0
1
2 0 1
8
0
1 0 0
1
0
1
9
0
1
4 0 1
VSC7127R #2
0
1
3
VSC7127R #1
0
1
0
1
2
0
1
Optics or Copper
0
1
1
7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes 7125 SerDes
10 11 12
LOOP B
Repeater
0
Repeater
Page 2
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
G52293-0, Rev 2.3 5/7/01
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7124
Figure 2: Timing Waveforms
Quad Port Bypass Circuit
Ix+/-
Ox+/T1 T1
AC Characteristics
Parameters
T1 TR, TF Tj(PBC)
(Over Recommended Operating Conditions)
Description
Propagation Delay Serial Data Rise and Fall Time Data Jitter Accummulation
Min
Typ
Max
7.0 300 120
Units
ns ps ps
Conditions
Delay with all circuits bypassed. At VIN minimum levels Peak-to-Peak on Ox+/-
DC Characteristics (Over Recommended Operating Conditions)
Parameters
VOH VOL VIH VIL IIH IIL VOUT75(1) VOUT50(1) VIN(1) VDD PD IDD
Description
Output HIGH voltage (TTL) Output LOW voltage (TTL) Input HIGH voltage (TTL) Input LOW voltage (TTL) Input HIGH current (TTL) Input LOW current (TTL) TX output differential peak-to-peak voltage swing TX output differential peak-to-peak voltage swing Receiver differential peak-to-peak Input Sensitivity RX Supply voltage Power dissipation Power Supply Current
Min
2.4
Typ
Max
0.5
Units
V V V V A A mVp-p mVp-p mVp-p V mW mA
Conditions
IOH = -1.0 mA IOL = +1.0 mA
2.0 0 50
5.5 0.8 500 -500
VIN =2.4V VIN =0.5V 75 to VDD - 2.0 V 50 to VDD - 2.0 V Internally biased to VDD/2 3.3V5% Outputs open, VDD = VDD max 2% Outputs open, VDD = VDD max
1200 1000 400 3.14 250 76
2200 2200 2600 3.47 555 160
NOTE: (1) Refer to Application Note AN-37 for details regarding differential voltage measurements.
G52293-0, Rev 2.3 05/07/01
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
Page 3
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
Quad Port Bypass Circuit
VSC7124
Absolute Maximum Ratings (1)
TTL Power Supply Voltage (VDD)...................................................................................................... 0.5V to +4V PECL DC Input Voltage (VINP) ............................................................................................. -0.5V to VDD +0.5V TTL DC Input Voltage, (VINT).......................................................................................................... -0.5V to 5.5V DC Voltage Applied to Outputs for High Output State (VIN TTL) ........................................ -0.5V to VDD + 0.5V TTL Output Current (IOUT), (DC, Output High)........................................................................................... 50mA PECL Output Current (IOUT), (DC, Output High) ....................................................................................... -50mA Case Temperature Under Bias, (TC)............................................................................................. -55C to +125C Storage Temperature (TSTG)........................................................................................................ -65C to + 150C
Recommended Operating Conditions(2)
Power Supply Voltage (VDD) . ......................................................................................................+3.14V to 3.47V Ambient Operating Temperature Range (T)....................................................................... 0C to +85C Ambient
NOTES: (1) CAUTION: Stresses listed under "Absolute Maximum Ratings" may be applied to devices one at a time without causing permanent damage. Functionality at or above the values listed is not implied. Exposure to these values for extended periods may affect device reliability. (2) Vitesse guarantees the functional and parametric operation of the part under "Recommended Operating Conditions" except where specifically noted in the AC and DC Parametric tables.
Page 4
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
G52293-0, Rev 2.3 5/7/01
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7124
Package Pin Descriptions
Figure 3: Pin Diagram
VDDP2 VDDP3 O2+ VSS O3+ O2I2+ O3I3+ I2I3-
Quad Port Bypass Circuit
43 VSS VDD I1I1+ VDDP1 O1O1+ VSS I0I0+ VSS 11 13 9 7 5 3 1
41
39
37
35
33
VSS VDD
31
O4+ O4-
29
VDDP4 I4+
VSC7124
27
I4VDDP0
25
O0O0+
23 15 17 19 21
N/C
SEL1
SEL2
SEL0
SEL3
SEL4
VSS
N/C
VDD
N/C
Table 1: Pin Identifications Pin #
4, 3, 41, 40 35, 34, 28, 27 10, 9 15, 16, 17, 18 14 7, 6, 44, 43 38, 37, 31, 30 24, 25 2, 21, 32 5 42 36 29 26 12, 13, 20, 22, 23 1, 8, 11, 19, 33, 39
Name
I1+, I1-, I2+, I2I3+, I3-, I4+, I4I0+, I 0SEL1, SEL2 SEL3, SEL4 SEL0 O1+, O1-, O2+, O2O3+, O3-, O4+, O4O0+, O0VDD VDDP1 VDDP2 VDDP3 VDDP4 VDDP0 N/C VSS
N/C
N/C
Description
INPUT - Differential, Internally Biased to VDD/2 Ix+/Ix- is the serial input to PBCx. INPUT - TTL Port Bypass Mux SELect lines. A HIGH selects Ix. A LOW selects the output of the previous internal device. OUTPUT - Differential Ox+/Ox- is the serial output from PBCx. Digital Logic Power Supply. Power Supply (3.3V) for O1+/-. Power Supply (3.3V) for O2+/-. Power Supply (3.3V) for O3+/-. Power Supply (3.3V) for O4+/-. Power Supply (3.3V) for O0+/-. Not Connected Ground If unused, connect to VSS. If unused, connect to VSS. If unused, connect to VSS. If unused, connect to VSS. If unused, connect to VSS
G52293-0, Rev 2.3 05/07/01
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
Page 5
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
Quad Port Bypass Circuit
VSC7124
Package Information
44-Pin PQFP 10 x 10 mm F G
44 34
Item
A D
mm
2.45 2.00 0.35 13.20 10.00 13.20 10.00 0.88 0.80
Tol.
MAX +0.10 +.05 +.25 +.10 +.25 +.10 +.15 / -.10 BASIC
1
33
E F G H I H I J K
11
23
12
12o TYP
22
D
12o TYP
K
0.30 RAD. TYP.
A
0.20 RAD. TYP. 0.25 MAX.
0.17 MAX. 0.25
NOTES: Drawing not to scale. Cavity up All units in mm unless otherwise noted.
0o- 8o
J1 E J
0.102 MAX. LEAD COPLANARITY
Page 6
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
G52293-0, Rev 2.3 5/7/01
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7124
Package Thermal Characteristics
Quad Port Bypass Circuit
The VSC7124 is packaged in a standard plastic quad flatpack, PQFP. This package adheres to industry-standard EIAJ footprints for a 10mm body, 44-pin PQFP. The package construction is shown in Figure 4. The 44pin PQFP with embedded slug has the thermal properties listed in Table 2.
Figure 4: Package Cross Section
Plastic Molding Compound
Lead
Bond Wire
Die
Table 2: 44 PQFP Thermal Resistance Symbol
CA-0 CA-100 CA-200 CA-400 CA-600
Description
Thermal resistance from case-to-ambient, still air Thermal resistance from case-to-ambient, 100 LFPM air Thermal resistance from case-to-ambient, 200 LFPM air Thermal resistance from case-to-ambient, 400 LFPM air Thermal resistance from case-to-ambient, 600 LFPM air
Value
50 43 39 36 34
Units
o o o o o
C/W C/W C/W C/W C/W
The VSC7124 is designed to operate with an ambient temperature up to +70oC.
Moisture Sensitivity Level
This device is rated at a Moisture Sensitivity Level 3 rating with maximum floor life of 168 hours at 30C, 60% relative humidity. Please refer to Application Note AN-20 for appropriate handling procedures.
G52293-0, Rev 2.3 05/07/01
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
Page 7
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
Quad Port Bypass Circuit
VSC7124
Ordering Information
The order number for this product is formed by a combination of the device number and package type.
VSC7124
Device Type Quad Port Bypass Circuit Package QM: 44-Pin PQFP, 10mm x 10mm
XX
Marking Information
The package is marked with three lines of text as shown in Figure 5.
Figure 5: Package Marking Information
Pin 1 Identifier
VITESSE
Part Number DateCode
VSC7124QM ####AAAAA
Package Suffix Lot Tracking Code (4 or 5 characters)
Notice
Vitesse Semiconductor Corporation ("Vitesse") provides this document for informational purposes only. This document contains pre-production information about Vitesse products in their concept, development and/or testing phase. All information in this document, including descriptions of features, functions, performance, technical specifications and availability, is subject to change without notice at any time. Nothing contained in this document shall be construed as extending any warranty or promise, express or implied, that any Vitesse product will be available as described or will be suitable for or will accomplish any particular task. Vitesse products are not intended for use in life support appliances, devices or systems. Use of a Vitesse product in such applications without written consent is prohibited.
Page 8
(c) VITESSE SEMICONDUCTOR CORPORATION * 741 Calle Plano * Camarillo, CA 93012 Tel: (800) VITESSE * FAX: (805) 987-5896 * Email: prodinfo@vitesse.com Internet: www.vitesse.com
G52293-0, Rev 2.3 5/7/01

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