Product category: Analogue and Mixed Signal ICs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: SN65LVCP40
Edited by the Electronicstalk Editorial Team on 8 November 2004
Data buffer has dual multiplexer
Texas Instruments has introduced the industry's first 0- to 4-Gbps data buffer/signal conditioner with a dual multiplexer
The SN65LVCP40 enables designers of communications systems to upgrade 1-Gbps systems to 4-Gbps without redesigning their backplanes. The device supports high-speed networking standards such as XAUI, Gigabit Ethernet, FibreChannel and InfiniBand and can also be applied as a link replicator or data redundancy switch in backplanes. The LVCP40 provides four selectable levels of output pre-emphasis on the drivers so that the designer can optimize performance to particular trace or cable lengths.
This article was originally published on Electronicstalk on 8 November 2004 at 8.00am (UK)
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Receiver equalization on the inputs reduces jitter, which is measured at 90 psec at input, to as low as 30 psec at output.
As a result, the equalizer compensates for intersymbol interference (ISI) effects inherent in transmission of data over longer distances.
The equalization is optimized to compensate for a FR-4 backplane trace with 5-dB, high-frequency loss between 375 MHz and 1.875 MHz, which corresponds to a 20-inch long FR-4 trace with 8-mil trace width.
The LVCP40 combines a pair of 1:2 buffers with a pair of 2:1 serial multiplexers (mux) and incorporates a selectable switch-side loopback that supports system testing.
Each of the two independent channels consists of a transmitter with a fan-out of two and a receiver with a 2:1 input multiplexer.
The multiplexers can be configured to handle system redundancy requirements from the line card to the controller card.
They can also be configured to provide a loopback function through the device for either device-level or system-level testing.
'Until now, communicating at multi-gigabit speeds over backplanes has meant a substantial investment in specialized transmission media,' said Art George, vice president and manager of TI's high-performance linear business.
'Using the capabilities of TI's BiCOM-III process, today the LVCP40 is able to open the data 'eye' at industry-leading low power, allowing designers to improve performance and save cost and time to market by quickly upgrading their systems to 4 Gbps, while leaving in place their 1-Gbps backplanes.'
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