Product Summary
VSC8144
2.488Gb/s 4:1 SONET/SDH Transceiver with Integrated Clock Generator
Features
• Multi-Rate Transceiver for SONET OC-48, OC-24,
OC-12, OC-3, and Gigabit Ethernet Rates
• 4-Bit LVDS Low-Speed Interface
• On-Chip PLL-Based Clock Generator
• High-Speed Clock Output
• Equipment, Facility and Split Loopback Modes
• Exceeds Bellcore Jitter Performance
• Single 3.3V Power Supply
• 2.5 W Maximum Power Dissipation
• 100-Pin PQFP (14x14x2mm)
General Description
The VSC8144 is a SONET/SDH compatible multi-rate transceiver with integrated clock generator for use in
SONET/SDH systems operating at OC-48, OC-24, OC-12, OC-3, or Gigabit Ethernet data rates. The internal clock
generator uses a Phase Locked Loop (PLL) to multiply either a 77.76MHz, 155.52MHz, or 622.08MHz reference clock
for internal logic and output retiming. The 4-bit parallel LVDS interface incorporates an on-board FIFO to address loop
timing design issues. Facility and Equipment Loopbacks can be configured separately or simultaneously. The device
operates with 2.5 W maximum power and is packaged in a thermally enhanced 100-pin PQFP package.
Block Diagram
VSC8144
High-Speed Data
High-Speed Clock
DEMUX
4
Low-Speed Data
Low-Speed Clock
High-Speed Loopback
Test
Low-Speed Loopback
OC-48/12/3 GbE Control
CMU
Reference Clock
4
Low-Speed Data
Low-Speed Clock
High-Speed Data
High-Speed Clock
MUX
FIFO
Low-Speed Clock
Order Information
Product
Package
VSC8144QQ
Notice
100-Pin PQFP
Vitesse Semiconductor Corporation (“Vitesse”) provides this document for informational purposes only. This document contains pre-production information about Vit-
esse 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 prohib-
ited.
PS031601.3.1
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VITESSE
SEMICONDUCTOR CORPORATION
• 741 Calle Plano • Camarillo, CA 93012
Tel: (800)-VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
