Configurable I/O chip supports SDI broadcast video equipment
April 14, 2010 // Paul Buckley
The industry's first configurable I/O chip for serial digital interface (SDI) broadcast video equipment from National Semiconductor Corp., simplifies design by providing manufacturers the flexibility to program their BNC interface connectors as either inputs (equalizer) or outputs (cable driver).
The PowerWise LMH0387 targets 3G/HD/SD video capture and editing cards that have a limited number of coax BNC connectors, as well as processing and distribution equipment that support a wide variety of I/O configurations.
Prior to the LMH0387's availability, SDI ports were fixed as inputs or outputs, requiring designers to build one card per I/O configuration.
Equipment manufacturers had to bear the higher research and development and inventory holding costs of supporting multiple configurations. By providing a flexible I/O BNC interface, the LMH0387 reduces the number of unique I/O configurations and associated costs. In addition, the universal BNC interface allows manufacturers to program their equipment I/O configurations post-delivery during studio installation. For example, a compact router frame with 64 BNCs may be configured as a 32 by 32 matrix, a 1 to 63 distribution amplifier, or any other combination of inputs and outputs to meet the application's particular demand.
The LMH0387 is also the first solution to integrate the complex return loss network, to assure compliance to the Society of Motion Picture and Television Engineers (SMPTE) 424M return loss specification. The on-chip return loss network eliminates the time consuming and costly process of tweaking passive component values to achieve spec compliance. By integrating the network, the LMH0387 accelerates time-to-market, conserves board area, reduces bill of materials cost, and achieves greater than 5 dB of margin above the SMPTE specification.
The LMH0387 uses the same I/O pin for both input and output functions, and operates over a wide range of data rates from 125 Mbps to 2.97 Gbps, supporting SMPTE 424M, SMPTE 292M, SMPTE 344M and SMPTE 259M specifications.
The LMH0387 equalizes up to 120 meters of Belden 1694A coaxial cable at 3G rates, 200 meters at high-definition (HD) rates and 400 meters at standard-definition (SD) rates. The LMH0387 delivers 75 ps rise and fall time performance and power-down control in the output driver mode. In the input mode, the device offers a power-saving sleep mode, programmable output common-mode voltage and swing, cable length indication, launch amplitude optimization, input signal detection and an SPI-compatible serial interface.
Availability and Pricing
Available now, the LMH0387 is supplied in a space-saving 48-pin chip-scale package and is priced at 12.95 US Dollars each in 1,000-unit quantities.
Related link: LMH0387
Astute launches Electromech division with key franchises
November 28, 2014
Astute Electronics, a supplier of electronic components and value added services, has launched a franchised electromechanical ...
The potential pot of gold in mobile marketing
electrolyte promises cheaper magnesium-sulfur batteries
Korea, France join forces on driverless cars R&D
Proton-conducting graphene membranes enhances fuel cell performance
Catcher drones to geo-fence industrial sites
November 27, 2014
Once more last October, drones were making the headlines in France, with unidentified units reportedly flying over the country's ...
Industry embraces 48V supply in the aim of bringing down emissions
ST, InvenSense X-Fab amongst MEMS award winners
Chip market for wireless sensor networks on 23% CAGR
- Common Mode Rejection in Wide Input Range Op Amps
- Power Systems Design eBook
- Halogen-free options and increased performance for terminal blocks
- Wireless Power User Guide
InterviewCEO interview: Vicor powers after higher volume applications
Patrizio Vinciarelli, is one of the longest serving CEOs in electronics, having founded Vicor in 1981 and led the company ever since. At Electronica he told EE Times Europe that his company is investing ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
This month, Cherry is giving away five of its Energy Harvesting Evaluation kits, worth over 266 Euros each, for EETimes Europe's readers to win. Cherry's energy harvesting technology benefit mostly applications where a complex wire assembly and/or batteries would be inappropriate.
The required RF-energy is created by the mechanical actuation of the switch and the data is transmitted...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.