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Chrontel delivers first LVDS transmitter for Intel PC interface

Posted: 11 Jan 2005 ?? ?Print Version ?Bookmark and Share

Keywords:chrontel? low voltage differential signal transmitter? lvds transmitter? ch7308a? intel?

Chrontel Inc. is now sampling a new low voltage differential signal (LVDS) transmitter, the CH7308A, which it claims is the world's first LDVS chip that complies with Intel Corp.'s new, proprietary serial digital video output (sdvo) PC interface specification.

LVDS devices are mixed-signal ICs that are used in almost every laptop PC to transmit display pixel data from the CPU motherboard, across the open hinge of the laptop, to the flat panel display.

Other manufacturers, including Conexant Systems Inc. and Silicon Image Inc., released similar devices last year. However, while both of these companies' devices are SDVO-compliant transmitters for PCI Express PC systems, they provide a digital visual interface (DVI) output instead of an LVDS output. DVI outputs drive an external video display that is not part of the computer itself.

Intel confirmed that Chrontel is in fact the first company to come out with an SDVO-compliant LVDS device.

Intel's latest PCI Express chipsetsthe Intel 915G, 915GV and 910GL Express chipsetsinclude an integrated graphic device (IGD) that delivers cost-competitive 3D, 2D and video capabilities. These IGD chipsets use Intel's SDVO specification to drive external displays with a high-speed serial data interface. Laptop and LCD-PC manufacturers that design new PCs using these PCI Express chipsets will need to design-in LDVS transmitters that comply with the new SDVO interface.

The CH7308A transmitter is the industry's first LVDS device that supports the 1Gbps to 2Gbps high-speed SDVO interface specification. It supports output rates up to 165Mp/s, suitable for driving flat panel displays with resolutions up to UXGA (1,600 x 1,200 pixels) at a 60Hz refresh rate.

The CH7308A chip is already being designed into the latest laptop and LCD-PC designs by leading Japanese PC OEMs, according to Chrontel.

Production volumes of the CH7308A will be available this quarter. The device is offered in a 64-pin LQFP package, and comes complete with Windows driver support. The CH7308A is priced at $4.50 in 10,000-piece quantities. Additional information can be found online.

- Bettyann Liotta


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