Product category:
Analogue and Mixed Signal ICs
News Release from: National Semiconductor | Subject: DS25BR100, DS25BR110 and DS25BR120
Edited by the Electronicstalk Editorial
Team on 29 March 2007
Signal conditioning buffers for LVDS
products
Three new signal-conditioning buffers are low-voltage differential signaling devices which offer transmit pre-emphasis and receive equalisation for superior jitter performance up to 3.125Gbit/s.
National Semiconductor has introduced three new signal-conditioning buffers to its low-voltage differential signaling (LVDS) product portfolio These buffers are thought to be the industry's first LVDS devices to offer transmit pre-emphasis and receive equalisation for superior jitter performance up to 3.125Gbit/s, while using less power than previous generation buffers
This article was originally published on Electronicstalk on 5 Jan 2001 at 8.00am (UK)
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National's DS25BR100, DS25BR110 and DS25BR120 are single-channel LVDS buffers that provide enhanced signal integrity up to 3.125Gbit/s.
They offer the industry's best jitter performance at 9ps typical and the lowest power at 100mW.
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National optimised these LVDS buffers for high-speed signal transmission over FR-4 backplanes and cables used in communications, storage and imaging systems.
For example, they drive 2.5Gbit/s transmissions over 10m of InfiniBand cable or 100cm of FR4, with 0.15 units interval (UI) of residual jitter at the equaliser output.
They can also boost signals in next-generation serial digital interface (SDI) broadcast video routers and home theatre digital visual interface (DVI) cable interconnects.
These LVDS buffers provide 7 kV of electrostatic discharge (ESD) protection and are well-suited for buffering signals from the new generation of 90 and 65nm field-programmable gate arrays (FPGAs) and applications-specific integrated circuits (ASICs).
Offered in 8-pin LLP packages, the 3.125Gbit/s DS25BR1xx devices have fully differential signal paths that ensure superior signal integrity and noise immunity.
The DS25BR100 has two levels of transmit pre-emphasis and receive equalisation, making it well-suited for use as a repeater device.
The DS25BR120 has four levels of pre-emphasis for use as an optimised driver device, and the DS25BR110 has four levels of equalisation for use as an optimised receiver device.
The LLP package's small 3 x 3mm footprint saves board space, and the flow-through pin-out minimises internal device jitter and allows easy board layout.
These buffers accept LVDS, current-mode logic (CML) and low-voltage positive emitter coupled logic (LVPECL) input, and the output levels are fully LVDS compliant.
The differential inputs and outputs are internally terminated with a 100Ohm resistor to lower device input and output return losses, reduce component count and further minimise board space.
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