4timing.com, June 2003
Ten InfiniBand industry companies are
teaming to form a new multi-source agreement that will define a common
architecture and electrical interface for developing hot-swappable 4X copper and
4X/12X fiber-optic transceivers for InfiniBand designs. Once completed,
the new MSA, called IBPAX, will define a front-panel, hot-swap transceiver that
can deliver between 10- and 30-Gbit/s data performance. The specification
incorporates the electrical, copper cable, and fiber requirements defined in
InfiniBand Architecture Spec Volume 2, Release 11. The spec will also
define an electrical connector, package outline, guide rail, test and control
features. The IBPAK spec will also detail common product specifications
for PCB layout, front-panel requirements, electromagnetic interference seal and
With the help of IBM
Microelectronics, Analog Devices Inc. has embedded 24 Mbits of DRAM onto its
latest TigerSharc DSP. The TigerSharc also features a repipelined core and
a revamped I/O structure that emphasizes fast clocking, multiprocessing and I/O
throughput. The company's previous TS101s TigerSharc topped out at
300 MHz, included 6 Mbits of six-transistor SRAM and used half-duplex
low-voltage TTL signaling. The new TS201s tops out at 600 MHz, has 24
Mbits of IBM's zero-leakage embedded DRAM and uses full-duplex low-voltage
differential signaling on the LinkPort I/O interface. The 600-MHz clock
rate was achieved by adding four pipeline stages, bringing the total to 12.
BitBlitz Communications Inc. has
entered the burgeoning market for octal retimers designed for the IEEE's
emerging CX-4 standard, which specifies 10-Gbit Ethernet links over short
lengths of coaxial cable. Whereas earlier CX-4 retimers from Broadcom
Corp. and Marvell Semiconductor were based on serializer/deserializer designs,
BitBlitz is betting that an optimized retimer is appropriate for LX-4
applications using multimode fiber for interconnects out to 300 meters.
The BBT3821 must perform retiming between the Xaui interfaces used in 10-Gbit
media-access controllers and the CX-4 pin-outs used for short-haul copper
interconnects. The retimers are being used in Xenpak or X2 modules
designed for CX-4 applications.
Extending the industry's leading
delta-sigma data converter portfolio, Texas Instruments (TI) recently introduced
the industry's fastest 18-bit analog-to-digital converter (ADC) from the
company's Burr-Brown product line. Featuring a 1.25 mega samples per
second (MSPS) data rate with outstanding high-speed performance, the ADS1625 is
ideal for demanding measurement requirements in scientific instrumentation,
automated test equipment, data acquisition and medical imaging.
The ADS1625 features 93dB
signal-to-noise ratio, -101dB total harmonic distortion and 103dB spurious-free
dynamic range. Input bandwidth is 615kHz (-3dB) and pass band ripple is
less than +/-0.0025dB (to 550kHz). The input signal is measured against a
voltage reference that can be generated on-chip or supplied externally.
The digital output data is provided over a simple parallel interface that
directly connects to TI's TMS320C6000(TM) DSP family. The device operates
from a +5V analog supply and a +3V digital supply. The digital I/O supply
operates from +2.7V to +5.25V, enabling the digital interface to support a range
of logic families. Power dissipation is set by an external resistor and
can be reduced when operating at slower speeds (150mW to 515mW). A
power-down mode, activated by a digital pin, shuts down all circuitry.
Amotech´s ceramic division called AMECS offers a complete series of
dielectric patch antennas. These patches have low profile, ceramic antenna
elements for use in portable GPS receivers and navigation systems.
Designed for 1575.42 MHz reception, the antennas have four different footprints
as 25 mm×25mm, 18 mm×18 mm, 15×15 mm and 12 mm×12 mm with a low profile.
These flat patch antennas have a rectangular micro-strip design for GPS C/A
right- and circular polarization wave reception. The patch antennas have
an impedance of 50 Ω. The offered gain starts between 3 dBi for the
small patches 12,15 and 18, and 5 dBi for the 25 × 25 antenna.
Gartner Dataquest analysts has
indicated that the semiconductor equipment industry is poised for growth, with 8
percent growth in capital spending likely this year and 15 percent growth
possible for 2003. Next year could be another banner year for the chip
industry, with growth exceeding 20 percent for both 2004 and 2005, resulting in
a $250 billion semiconductor industry in 2005. The company is predicting
23 percent chip revenue growth in 2004, and 22 percent in 2005.