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 • Equipment, Facility and Split Loopback Modes • 4-Bit LVDS Low-Speed Interface • Single 3.3V Power Supply • On-Chip PLL-Based Clock Generator • 2.5 W Maximum Power Dissipation • High-Speed Clock Output • 100-Pin PQFP (14x14x2mm) • Exceeds Bellcore Jitter Performance 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 4 High-Speed Data High-Speed Clock High-Speed Loopback DEMUX Low-Speed Clock Low-Speed Loopback Test Reference Clock CMU OC-48/12/3 GbE Control 4 Low-Speed Data Low-Speed Clock High-Speed Data High-Speed Clock Low-Speed Data FIFO MUX Low-Speed Clock Order Information Product VSC8144QQ Package 100-Pin PQFP 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. PS031601.3.1 © VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012 Tel: (800)-VITESSE • FAX: (805) 987-5896 • Email: [email protected] Internet: www.vitesse.com