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Technology Stocks : Vitesse Semiconductor -- Ignore unavailable to you. Want to Upgrade?

To: Lee Fredrickson who wrote (2087)	12/13/1998 8:50:00 PM
From: trendmastr	Respond to of 4710

January 99' issue of Wired has a write-up on VTSS tm

To: Lee Fredrickson who wrote (2087)	1/6/1999 10:31:00 AM
From: Beltropolis Boy	Read Replies (1) \| Respond to of 4710

Electronic Engineering Times January 04, 1999, Issue: 1042 Section: Semiconductors Offerings due from PMC-Sierra, Vitesse, AMCC -- Tempo up on Sonet clock race Loring Wirbel Burnaby, B.C. - The process-technology race for physical-layer devices at high Sonet rates is heating up. PMC-Sierra Inc. will expand its CMOS products with new spins of its popular Saturn user network interface (Suni) design. Vitesse Semiconductor Inc. (Camarillo, Calif.) and Applied Microcircuits Corp. (AMCC; San Diego) will launch GaAs and bipolar products, respectively, for transceiver and clock-generation duties. PMC-Sierra will take Suni in two directions at the OC-12 (622-Mbit/second) Sonet line rate. The PM5356 Suni-622-Max pulls together Sonet framing and ATM cell processing, then adds serializer/deserializer, clock synthesis and clock recovery. The PM5357 Suni-622-POS is optimized for packet-over-Sonet applications. Steve Perna, PMC's vice president of marketing, said the Max has a phase-locked loop that meets Bellcore GR 253 jitter specs and integrates all functions between the optical transceiver and the Utopia system interface. It meets the Utopia Level 3 spec, which supports native OC-12 and channelized OC-48 (2.5-Gbit/s) Sonet line rates. It interfaces directly with PMC's 7322 RCMP ATM cell processor and with the PM73487 QRT switching chip set, which PMC acquired from Integrated Telecom Technology Inc. The 3.3-V CMOS chip sets averages 2 W in power dissipation, which will let Sonet and wave-division mux systems achieve new line-card densities. The PMC5357 POS is intended more for specialized routers and access systems that will run Internet Protocol packets directly over Sonet. Edge-router startup Redstone Communications Inc. is among those using the POS device. The 5357 integrates serializer/deserializer, clock-recovery and clock-synthesis blocks and supports direct IP mapping over Sonet, as specified by the Saturn POS Working Group. The 5357 in a 304-pin ball-grid array costs $249 in 1,000-piece units; the 5356 costs $199. Transceiver focus Vitesse is emphasizing the integration of clock recovery and multiplication in the transceiver rather than the user-network-interface device. The VSC8116 and VSC8117 transceivers have an on-chip clock multiplication unit that supports both 155- and 622-Mbit operation. The VSC8117 includes a clock-recovery unit and clock multiplier. An on-chip PLL can be selected for OC-3 or OC-12 rates. The devices support 8-bit serial/parallel and parallel/serial conversion and include loopback and loop-timing modes for in-system test. The VSC8117, for designs in which the UNI device lacks clock recovery, uses an on-chip CRU block for demux. Both transceivers are packaged in a special 64-pin plastic quad flat pack with integrated heat sink, priced at $33 for the VSC8116 and $35 for the VSC8117, in quantities of 100. AMCC is offering two standalone clock- and data-recovery devices for Sonet and ATM applications. The S3047 is an OC-48 (2.5-Gbit/s) device that does not require an external clock. It targets line-card applications directly supporting optical or WDM interfaces. The S3050 CDR is a device intended to support OC-3, OC-12, OC-48 and Gigabit Ethernet. Both devices use an on-chip PLL, but they integrate different feature sets, for handling either high speeds with no external clock or multiple speeds in one system. The S3047 supports scrambled non-return-to-zero data at 2.5 Gbits; the S3050 supports NRZ at various line rates. Pricing in lots of 100 is $145 for the S3047 and $165 for the S3050. Copyright ® 1999 CMP Media Inc. techweb.com