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TI Introduces Industry's First Multipoint-LVDS Line Drivers for Clock Distribution

True Multipoint Devices Provide High Noise Margin for Heavily-Loaded Backplanes

Sep 30, 2004

DALLAS (September 30, 2004) - Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced the industry´s first multipoint-LVDS (M-LVDS) line drivers for clock distribution, providing high performance for heavily-loaded backplanes. Compliant with the M-LVDS specification TIA/EIA-899, the devices provide a drive current of 11.3 mA with edge rate control and are ideal for a wide range of high-speed, inter- and intra-system communications, including wireless base station backplanes, AdvancedTCA® (Advanced Telecom Computing Architecture) clock buses, network switches and routers. The SN65MLVD128 and SN65MLVD129 offer a space and cost-saving alternative to typical methods that involve two separate devices for fanout and LVTTL to differential signal conversion. In addition, the higher output levels and lower input thresholds of M-LVDS provide more than twice the noise margin of typical LVDS-compliant devices. (See www.ti.com/sc04204.)


The MLVD128 and MLVD129 are 30-ohm to 55-ohm line drivers providing low-voltage differential signaling for clock frequencies up to 125 MHz. The MLVD128 1:8 fanout buffer and MLVD129 dual 1:4 device provide robust solutions for repeating a single-ended source clock differentially with low power and low electromagnetic interference (EMI). The MLVD047 is a quadruple M-LVDS line driver for 30-ohm to 55-ohm loads and data rates up to 200 Mbps or clock frequencies up to 100 MHz.
"The rapid expansion of telecommunications and data communications demands transmission systems with ever greater capacity and speeds at reduced power," said David Mulcahy, interface product marketing engineer, TI. "The MLVD128/129/047 can be used for many common telecommunications frequencies and support robust, scalable clock management in next-generation network infrastructure equipment."

Ideal for AdvancedTCA

M-LVDS is the only LVDS standard for use on buses that provides the controlled edge rates, increased drive strength, improved thresholds and contention provisions that enable the flexible distributed clock distribution scheme specified by the AdvancedTCA specification of the PCI Industrial Computer Manufacturers Group. The MLVD128/129/047 devices can distribute clocks on network equipment that is compliant to AdvancedTCA.

TI also offers a variety of power management products for AdvancedTCA, including a complete portfolio of point-of-load DC/DC converters and modules. In addition, the

TPS2393

high voltage hot swap controller is ideal for meeting AdvancedTCA dual -48V power input supply requirements.

Key Features

SN65MLVD128/129 

  • LVTTL receiver and eight line drivers configured as an 8-port M-LVDS repeater (MLVD128) 
  • Two LVTTL receivers and eight line drivers configured as dual 4-port M-LVDS repeaters (MLVD129) 
  • Low-voltage differential 30-ohm to 55-ohm line drivers for clock frequencies up to 125 MHz or data rates up to 250 Mbps 
  • Controlled driver output voltage transition times for improved signal quality 
  • Bus pin electrostatic discharge (ESD) protection exceeds 9 kV

 

SN65MLVD047

  • Differential line drivers for 30-ohm to 55-ohm loads and clock frequencies up to 100 MHz or data rates up to 200 Mbps 
  • Supports multipoint bus architectures 
  • Operates from a single 3.3-V supply 
  • Characterized for operation from -40ºC to 85ºC

Availability, Pricing and Support

The SN65MLVD128, SN65MLVD129 and SN65MLVD047 are available in volume quantities from TI and its authorized distributors. The MLVD128 and MLVD129 are packaged in 48-pin thin shrink small outline package (TSSOP), and the SN65MLVD047 is available in 16-pin small outline integrated circuit (SOIC) or 16-pin TSSOP. Suggested resale pricing in 1,000-piece quantities is $3.80 each for the MLVD128 and MLVD129 and $1.45 each for the MLVD047.

Samples are available for 24-hour delivery. To order samples or to download TI´s LVDS Application and Data Handbook, please go to 

www.ti.com/sc04204b

.