Equalizer enables 4 Gbps speed on 1 Gbps backplanes.

Press Release Summary:

Housed in 48-pin QFN lead-free package, SN65LVCP40, 0-4 Gbps data buffer/signal conditioner enables upgrade of 1 Gbps systems to 4 Gbps without redesigning backplane. It provides 0, 3, 6, or 9 dB selectable output pre-emphasis on drivers and features 5 dB receiver equalization for ISI jitter cleaning. Unit combines one pair of 1:2 buffers with single pair of 2:1 serial multiplexers and incorporates selectable switch-side loopback and 80 psec edge rates.

Original Press Release:

High-Performance Equalizer from TI Enables 4-Gbps Speed on Backplanes Designed for 1-Gbps

On-Board Pre-emphasis and Dual Redundancy Muxes Make Device Ideal for Datacomm Upgrades

DALLAS (November 4, 2004) - Texas Instruments Incorporated (TI) (NYSE: TXN) today 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. (See www.ti.com/sc04236.)

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. 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."

About BiCom-III

The BiCom-III SiGe process focuses TI's state-of-the-art manufacturing technology on the future needs of high-performance systems. The process is the first to integrate complementary NPN and PNP bipolar transistors in a SiGe process. The complementary bipolar transistors enable many high-performance analog and mixed-signal products, increasing speed up to 3X while reducing noise by as much as one half. BiCom-III affords the LVCP40 fast edge rates of 80-psec at low power consumption of only 330-mW/channel typical or 440-mW/channel maximum, and the process enables excellent electromagnetic isolation between channels to minimize crosstalk.

Key Features

· 5-dB receiver equalization for ISI jitter cleaning

· Driver pre-emphasis (0/3/6/9-dB)

· Low deterministic jitter (30-psec output DJ with input trace length of up to 20-inch FR-4) and sub 1-psec random jitter typical or 2-psec RJ maximum

· High channel-to-channel noise isolation

· Fast edge rates (80-psec)

· Low power (660-mW @ 4-Gbps typical or 880-mW @ 4-Gbps maximum)

· Loopback mode

· 1200-mV output swing

· 100-Ohm internal receiver termination with self-biasing and oddcommon-mode noise termination

· 3.3-V VDD

Availability, Pricing and Support

The SN65LVCP40 is available in volume from TI and its authorized distributors, packaged in a 48-pin QFN (quad flatpack no-lead) lead-free package. Suggested resale pricing in 1,000-piece quantities is $17.40 each.

Samples are available for 24-hour delivery.

Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers' real world signal processing requirements. In addition to Semiconductor, the company's businesses include Sensors & Controls, and Educational & Productivity Solutions.

TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries. More information is located on the World Wide Web at www.ti.com.

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