4timing.com, April 2003
Texas Instruments, Inc. announced
that its TMS320C64x digital signal processor has been designed into a mobile
communications basestations from the Information and Communication division of
Siemens AG that support the Time Division-Synchronous Code Division Multiple
Access (TD-SCDMA) standard.
In October 2002, China's Ministry of
Information Industry allocated 155 MHz of spectrum for use by TD-SCDMA.
The standard features flexible up and downlink data rates up to 2-Mbit/s
and coverage up to 40-kilometers and the standard is claimed to have spectral
efficiency superior to other 3G standards.
Foundry has unveiled a new
architecture of full-duplex 40-Gbit/second in future line cards.
The 80 million-transistor cross point switching ASICs offer a
port-to-port switching latency of less than 10 microseconds.
The architecture has three separate switching-fabric backplanes: a
640-Gbit/s backplane fabric for data path operations, a 640-Gbit/s local
switching fabric for operations between switching cards and a 20-Gbit/s
management fabric for operations on the control plane.
The first system to implement the
architecture is the BigIron MG8, with a capacity of 1.28 terabits/s in a single
chassis and 4 Tbits/s in a multichassis rack.
Low-power line cards and Xenpak optical modules push system capacity to
thirty-two 10-Gbit Ethernet ports per system, or 96 ports/rack.
Each port can handle up to 64,000 Layer 2 or 3 entries.
Xelerated Technology is shifting from its Sonet-only focus toward a network
processor product line that supports both Sonet and Gigabit Ethernet operation.
It just unveils two processor, the X10q-e and X10q-m, optimized for
Ethernet designs and it will phase out two lower-density Sonet parts—the X10s
The X10q-e is targeted solely at Ethernet designs and delivers a 60-Mpps
packet rate and a 6.5-W power dissipation figure. The X10q-m, on the other hand,
can be employed in Ethernet or Sonet designs and delivers a 90-Mpps packet rate
and a 10-W dissipation figure. The X10q-w, which sports a 100-Mpps packet rate
and 11-W power dissipation figure, will remain focused at the Sonet market. All
three parts are developed in a 0.13-micron process.
While most PCI bus
computer boards with multiple analog input channels use a single overworked A/D
converter and an analog multiplexer, Datel's 32-channel PCI-417N Series board,
for desktop computers, uses an A/D converter for each channel. Beside the
increase in total system speed, the PCI-417N samples all channels exactly in
parallel at rates up to 80 kHz per channel (5.12 Megabyte/second aggregate
rate). This concurrent A/D sampling
enables all kinds of time-correlated applications such as medical ultrasound or
in digital signal processing sonar or FFT engine testing.
Each input A/D converter digitizes to 14-bit resolution, lowering system
noise and increasing system dynamic range.
Full scale input voltage ranges of ±5V or ±10V are selectable per
channel. An on-board A/D memory
system prevents sample loss when streaming very large sample blocks to host disk
Dallas Semiconductor has
introduced its DS1626 three-wire digital thermometer and thermostat.
It is said to be the first three-wire ±0.5°C thermometer and standalone
thermostat available in a Micro-SOP package, making it appropriate for
applications that need high precision in a limited amount of space.
The DS1626 thermometer provides 9-, 10-, 11- or 12-bit digital
temperature readings over a 55°C to +125°C range, with ±0.5°C accuracy over
a 0°C to +70°C range. It has
thermostat functionality with nonvolatile (EEPROM) user-defined trip points that
allow the user to customize the threshold temperature and output hysteresis.
The DS1626 acts as a stand-alone thermostat, automatically measuring
temperature upon power-up and operating without processor or user intervention.
The DS1626 communicates through a standard three-wire serial interface.
Pulse has introduced a
family of filter modules, part numbers BX4037, BX4038, BX4039 and BX4040, for
Very high-bit-rate Digital Subscriber Line (VDSL) chipsets.
Twenty individual discrete components can be replaced with one Pulse VDSL
module. The multi-functioning
modules include a high-pass filter, a hybrid transformer, transmit (TX) and
receive (RX) separation filter and a common mode choke.
The modules meet IEC950 supplementary insulation requirements with what
is said to be the industry's most compact footprint.
Line return loss is between 4.1 MHz and 7.9 MHz, 12 dB for the modules.
The isolation voltage is rated at 1,500 Vrms; line impedance is rated at 120
Ω; TX impedance at 40 Ω and RX impedance at 270 Ω.
Their operating temperature range of 40°C to +85°C ensures stability
with minimum drift under a wide range of conditions.
Renco Electronics has
announced the RL-7000 Series SMT power inductor.
It is just under 1 mm high, and it has what is said to be the smallest
possible footprint of 4.2 mm × 6.4 mm. This
patented design uses ferrite shielding for complete suppression of EMI along
with up to 2.5A of saturation current handling.
This inductor series is suitable for use in mobile phones, notebook
computers, PC cards, PDAs and other handheld devices. The operating temperature
range is 40°C to +85°C.