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Switches allow connection of multiple devices to digital TV.

September 4, 2007 - Connecting either 2 or 3 digital video signals from devices to HDTV display, TMDS251 2-port switch and TMDS351 3-port switch integrates 4 transition minimized differential signaling (TMDS) channels, 1 hot plug detector, and digital display control interface on each port. Each channel supports signaling rates up to 2.5 Gbps to allow 1080p resolution in 12-bit color depth. ESD protection at connector is enabled by 8 kV human body model circuitry on TMDS inputs.

Related categories: Communication Systems and Equipment

Archive Press Release
(Products mentioned in this Archive Press Release may or may not be available from the manufacturer.)

Release date: August 22, 2007

TI Introduces Two High Performance HDMI Switches

3:1 and 2:1 Devices Allow Connection of Multiple Devices to a Digital TV

DALLAS (August 22, 2007) - Texas Instruments (TI) (NYSE: TXN) today introduced two new video switches for digital video interface (DVI) or high definition multimedia interface (HDMI). The new devices connect either two or three digital video signals coming from devices such as game consoles, digital video switch boxes, set-top boxes or DVD players to a single HDTV display. (See www.ti.com/tmds351-pr)

Both the TMDS351 three-port switch, and the TMDS251, two-port switch integrate four transition minimized differential signaling (TMDS) channels, one hot plug detector and a digital display control interface on each port. Each TMDS channel supports signaling rates up to 2.5 Gbps to allow 1080p resolution in 12-bit color depth, making it compatible with the HDMI 1.3a standard. Switchable termination resistors (50 ohm) are integrated at each TMDS receiver input, eliminating the need for external terminations. Both devices share the same package and pinout allowing customers to easily and quickly develop common platforms for 3 and 2 HDMI inputs.

The new HDMI/DVI switches provide selectable receiver equalization to accommodate different input cable lengths, allowing longer cable reaches and improved opening of the data eye for better noise budgeting. Each device provides strong electrostatic discharge (ESD) protection at the connector by featuring 8 kV human body model (HBM) circuitry on the TMDS inputs.

These new switches support power saving operation. When a system is in standby mode and there is no transmission of digital audio/visual content from a connected source, the 3.3-V supply voltage can be powered off to minimize power consumption from the TMDS inputs, outputs and internal switching circuits.

The TMDS351 and TMDS251 devices join TI's extensive offering of high-performance analog and digital signal processor (DSP) products for video applications, including DaVinciTM processors optimized for digital video systems, the TVP7000/1 triple 8/10-bit video ADCs, and DLPÂ® technology. TI provides the silicon, software, systems expertise and support for customers' video designs, enabling them to accelerate market entry. For more information on TI's video products, see the Video and Imaging Solutions Guide at www.ti.com/video.

Pricing and Availability

The TMDS351 and TMDS251 switches are available now in 64-pin TQFP packages, from TI and its authorized distributors priced at $2.50 and $1.60 respectively, each in 1,000-piece quantities.

About Texas Instruments

Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers' real world signal processing requirements. In addition to Semiconductor, the company includes the Education Technology business. TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries.

Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at www.ti.com.

Please refer all reader inquiries to:

Texas Instruments Incorporated
Semiconductor Group, SC-07136
Literature Response Center
14950 FAA Blvd.
Fort Worth, TX 76155
1-800-477-8924

Trademarks

DaVinci is a trademark of Texas Instruments. DLP is a registered trademark of Texas Instruments. All registered trademarks and other trademarks belong to their respective owners.

Company Information:
Name: Texas Instruments, Inc., Semiconductors
Address: 12500 Texas Instruments Blvd.
City: Dallas
State: TX
ZIP: 75243
Country: USA
Phone: 214-644-5580
FAX: 214-480-7800
http://www.ti.com/sc/

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