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Pericom Semiconductor’s PI3HDMI301 3:1 active switch circuit is targeted for high-resolution video networks that are based on DVI/HDMI™ standards and TMDS signal processing. The PI3HDMI301 is an active 3 TMDS to 1 TMDS receiver switch with Hi-Z outputs. The device receives differential signals from selected video components and drives the video display unit. It provides controllable output swings, as well as provides a unique advanced pre-emphasis technique to increase rise and fall times which are reduced during transmission across long distances.
Each complete HDMI/DVI channel also has slower speed, side band signals, that are required to be switched. Pericom’s solution provides a complete solution by integrating the side band switch together with the high speed switch in a single solution. Using Equalization at the input of each of the high speed channels, Pericom can successfully eliminate deterministic jitter caused by long cables from the source to the sink. The elimination of the deterministic jitter allows the user to use much longer cables (up to 25 meters).
The maximum DVI/HDMI Bandwidth of 2.5 Gbps provides 36-bit Deep Color™ support, which is offered by HDMI™ revision 1.3. Due to its active uni-directional feature, this switch is designed for usage only for the video receiver’s side. For consumer video networks, the device sits at the receiver’s side to switch between multiple video components, such as PC, DVD, STB, D-VHS, etc. The PI3HDMI301 also provides enhanced robust ESD/EOS protection of 8kV, which is required by many consumer video networks today.
The Optimized Equalization provides the user a single optimal setting that can provide passing results for HDMI jitter tests for all cable lengths: 1meter to 20meters with DeepColor support up to 36bits.
Pericom also offers the ability to fi ne tune the equalization settings in situations where cable length is known. For example, if 25meter cable length is required, Pericom's solution can be adjusted to 16dB EQ to accept 25meter cable length.
Supply voltage, VDD = 3.3V ±5%
Each of the three input ports can support HDMI™ or DVI signals
Supports both AC-coupled and DC-coupled inputs
High Performance, up to 2.5 Gbps per channel
Switching support for 3 side band signals (SCL, SDA and HPD)
5V Tolerance on all side band signals
SCL, SDA, and HPD pins are the only pins that can support HOT INSERTION
Integrated 50-ohm (±10%) termination resistors at each high speed signal input
TMDS input termination control on all high speed inputs
HDCP reset circuitry for quick communication when switching from one port to another
Configurable output swing control
Configurable Pre-Emphasis levels
Optimized Equalization Single default setting will support all cable lengths
8kV Contact ESD protection on all input data/clock channels per IEC61000-4-2