游客发表

14025/8AMP_Datasheet PDF

发帖时间:2021-06-15 02:02:08

Der Crash kam plötzlich: Im November 2008 verbuchte die Leiterplattenindustrie 20,7 Prozent weniger Umsatz als noch im Oktober. Die negative Entwicklung drückte auch den kumulierten Jahresumsatz in den negativen Bereich, der sich in den ersten zehn Monaten noch leicht über dem Vorjahreswert hatte halten können.

Some observers already have raised warnings that the smart grid funds need to be invested in radically different kinds of projects. Kurt Yeager, executive director of The Galvin Electricity Initiative, sent Secretary Chu an open letter in December calling for funds to be directed to local microgrid projects to offset what the group sees as the unreliability of the current centralized architecture.

SAN FRANCISCO, Calif. — Engineers showed progress pulling transceivers and other building blocks for 40 Gbit/second networking into CMOS at the International Solid State Circuits Conference (ISSCC).

14025/8AMP_Datasheet PDF

NEC Corp. described a full 40 Gbit/s transceiver made in a 65 nm process. Fujitsu, Broadcom and others detailed other key silicon building blocks for 40G nets.

The NEC device consisted of separate transmit and receive chips, each measuring 4.9 x 5.2 mm and dissipating 2.8 W. That compares to today's much larger silicon germanium transceivers that draw 10 W and require fans.

The reductions in size and power mean the chips could fit into a 28 x 21 mm module capable of handling multiple networking standards ranging from 39 to 44G.Audience members from Broadcom and Finisar praised the work.

14025/8AMP_Datasheet PDF

It was a very impressive paper, the best results I've seen to date,” said Christpher Cole, director of transceiver engineering at Finisar (Sunnyvale, Calif.). They have been working on this for years, but they still need to provide a more complete characterization of the chip,” he added.

The device is aimed for use in NEC's own computer and communications systems, but is a long way from commercialization, said Yasushi Amamiya, a principal researcher at NEC Corp. Ensuring long term robust operation is one of the challenges ahead, he added,

14025/8AMP_Datasheet PDF

Separately, Fujitsu described a 40 Gbit/s serializer, a key component for a 40G optical transport module. It supports 20G long haul and 40G short reach modes for Sonet OC-768, SDH STM 256 and ITU G.709.

To create the chip, engineers had to build a 20 GHz phase-locked loop with low phase noise yet a wide range. They also had to distribute that clock with reasonable power while optimizing chip timing in the face of process and temperature variations.

''Additionally, our recent field checks suggest that UnitedMicroelectronics' business outlook is not as constructive as Taiwan Semiconductor's, highlighting the possible market share loss at United Microelectronics.

''We believe that the outlook at United Microelectronics is still bleak, as wafer shipments in 1Q for key customers such as Broadcom, Nvdia and Texas Instruments are down by 45 percent to 50 percent quarter over quarter, with only a minimal quarter-over-quarter improvement in 2Q '09.''

Chartered Semiconductor Manufacturing Pte. Ltd.

''At Chartered Semi, although we believe the wafer shipment in 1Q09 is down only 30 percent, when compared to a foundry average of down 39 percent, we believe the wafer shipment in 2Q '09 will be down again by as much as 10 percent quarter-over-quarter. We attribute some of this to market share loss to TSMC, especially at key customers like AMD.''

Semiconductor Manufacturing International Corp.

热门排行

友情链接