Three-input active HDMI switch supports 3.4Gbps

STMicroelectronics announced a HDMI (High-Definition Multimedia Interface) to support a video data-transfer rate of up to 3.4-Gigabits per second (Gbps), enabling full 16-bit color depth (65k colors) to be maintained for a true high-definition (HD) picture. The STDVE003A is designed to be used in LCD and Plasma TV sets to provide multiple HDMI inputs for external program sources, such as game consoles, high-definition DVD players (Blu-ray and HD-DVD), and set-top boxes (STBs). In addition, its integrated equalizer is designed to overcome signal degradation when long (greater than 20m) and lossy cables are used. The STDVE003A is an active digital multiplexer designed for high-performance TMDS (Transition Minimized Differential Signaling) data transfer.

 Configured as a 3:1 switch, it enables TV designers to provide as many as three input ports while using only a single HDMI receiver chip. Signal integrity is maintained and enhanced by an internal active block which receives and equalizes the input signal before transmitting it to the next stage. The (3.4 Gbps) data-transfer rate is fully compliant with the latest and strictest HDMI specification, version 1.3. Control of signal routing through the switch is by means of Select pins. The device also supports DDC (Display Data Channel) and HPD (Hot-Plug Detect) data switching, and provides on-chip 50-ohm input termination. Flow-through pin-out ensures straightforward PCB layout.

 The STDVE003A complements ST’s existing STHDMI002A two-way high-speed TMDS switch. It is supplied in a TQFP80L package, priced at $1.50 in quantities of 100,000. Samples are available now, with volume production planned during Q4 2007.