VSC7124QM Vitesse Semiconductor Corp., VSC7124QM Datasheet

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VSC7124QM

Manufacturer Part Number
VSC7124QM
Description
Quad port bypass circuit. 3.3 power supply
Manufacturer
Vitesse Semiconductor Corp.
Datasheet
1.VSC7124QM.pdf (8 pages)

Specifications of VSC7124QM

Case
QFP
Dc
01+
VSC7124
G52293-0, Rev 2.3
05/07/01
Advance Product Information
Features
General Description
The VSC7124 contains five cascaded Port Bypass Circuits (PBCs) used to steer serial signals. This part is typ-
ically used in distributing Fibre Channel signals to an array of disk drives in an FC-AL loop as illustrated in Fig-
ure 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 config-
ured 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 exter-
nal input or, if LOW, selects the output of the previous PBC.
VSC7124 Block Diagram
• 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
PBC1
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
1
0
VITESSE
PBC2
SEMICONDUCTOR CORPORATION
1
0
Internet: www.vitesse.com
PBC3
1
0
PBC4
• 3.3V, 0.25W Typical Power
• 0.35um CMOS, a Velocity Family Member
• 44-Pin, 10mm PQFP Package
1
0
PBC0
Quad Port Bypass Circuit
1
0
Page 1

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VSC7124QM Summary of contents

Page 1

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 General Description The VSC7124 contains five cascaded Port Bypass ...

Page 2

Quad Port Bypass Circuit 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 ...

Page 3

Advance Product Information VSC7124 Ix+/- Ox+/- AC Characteristics (Over Recommended Operating Conditions) Parameters Description T Propagation Delay Serial Data Rise and Fall Time Data Jitter Accummulation j(PBC) DC Characteristics (Over Recommended Operating Conditions) ...

Page 4

Quad Port Bypass Circuit Absolute Maximum Ratings TTL Power Supply Voltage (V DD PECL DC Input Voltage (V ) ............................................................................................. -0. INP TTL DC Input Voltage, (V ).......................................................................................................... -0.5V to 5.5V INT DC Voltage Applied to Outputs for ...

Page 5

Advance Product Information VSC7124 Package Pin Descriptions VSS VDD I1- I1+ VDDP1 O1- O1+ VSS I0- I0+ VSS Table 1: Pin Identifications Pin # 4, 3, 41, 40 I1+, I1-, I2+, I2- 35, 34, 28, 27 I3+, I3-, I4+, I4- ...

Page 6

Quad Port Bypass Circuit Package Information 44-Pin PQFP TYP o 12 TYP 0.30 RAD. TYP. 0.20 RAD. TYP. 0.17 MAX. NOTES: Drawing not to scale. Cavity up All units in ...

Page 7

Advance Product Information VSC7124 Package Thermal Characteristics The VSC7124 is packaged in a standard plastic quad flatpack, PQFP. This package adheres to industry-stan- dard EIAJ footprints for a 10mm body, 44-pin PQFP. The package construction is shown in Figure 4. ...

Page 8

... Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com VITESSE SEMICONDUCTOR CORPORATION Advance Product Information XX VSC7124 Package QM: 44-Pin PQFP, 10mm x 10mm Figure 5: Package Marking Information VITESSE VSC7124QM ####AAAAA Internet: www.vitesse.com VSC7124 Package Suffix Lot Tracking Code ( characters) G52293-0, Rev 2.3 5/7/01 ...

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