Product category: Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: DS50EV401
Edited by the Electronicstalk Editorial Team on 21 February 2008
Four-channel equaliser runs at Express
speed
Provides high-speed signal transmission over backplanes and cables used in storage area networking, switch fabrics, comms infrastructure and automated test equipment.
National Semiconductor Corp has the industry's first quad equaliser specifically designed for PCI Express (PCIe) applications up to 8Gbit/s data transmission rates The device supports PCIe Gen1 (2.5Gbit/s), PCIe Gen2 (5Gbit/s) and PCIe Gen3 (8Gbit/s) datarates, with typical power consumption of only 100mW per channel
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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The DS50EV401 provides high-speed signal transmission over backplanes and cables used in storage area networking (SAN), switch fabrics, communications infrastructure and automated test equipment (ATE).
The quad equaliser compensates for transmission medium losses, reducing deterministic jitter on four data transmission channels.
It provides 20dB of receive boost to equalise up to 10m of PCIe cable or 40in of FR-4 printed circuit board (PCB) at data transmission rates up to 5Gbit/s, with less than 0.2 unit intervals (UI) of residual jitter at the equaliser output.
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Additionally, the DS50EV401 equalises up to 30in of FR-4 at datarates up to 8Gbit/s, while maintaining the same jitter performance.
Its power-to-speed ratio of 13mW/Gbit/s per channel, when used in 8Gbit/s applications, positions the DS50EV401 among National's PowerWise family of energy-efficient products.
The DS50EV401 simplifies system integration.
Its input signals can be AC or DC coupled to interface with a variety of ASIC and field-programmable gate arrays (FPGAs).
The device provides two equalisation settings to reduce inter-symbol interference (ISI) generated by the interconnect media.
One setting minimises jitter for PCIe Gen 1 and PCIe Gen 2 datarates, while the other minimises jitter for the anticipated PCIe Gen 3 datarates.
The DS50EV401 supports PCIe link extensions with transmit idle and beacon signalling on a 1x, 2x and 4x lane basis.
It uses differential current-mode logic (CML) inputs and outputs that feature 8kV of electrostatic discharge (ESD) protection.
Additionally, the equaliser includes a loss-of-signal (LOS) detect for each channel, operates over the full -40 to +85C temperature range and requires a single supply voltage of 2.5 or 3.3V.
National fabricates this signal-conditioning part on its high-performance silicon-germanium (SiGe) BiCMOS-8 process technology, which provides high performance-to-power ratios for high-speed interface devices.
The DS50EV401 is the latest addition to National's growing family of signal-conditioning equalisers, which include the DS64EV400 and DS32EV400 quad equalisers, DS64EV100 and DS32EV100 single-channel equalisers, DS38EP100 and DS80EP100 power-saver equalisers, DS16EV5110 video cable equaliser, DS25BR110 LVDS equaliser, DS40MB200 dual mux-buffer, and DS15BA101 and DS15EA101 cable extender chipset.
Available now, the DS50EV401 is offered in a 7 x 7mm 48-pin leadless LLP package and is priced at US $9.90 each in 1000-unit quantities.
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