CAT6352 2-to-1 HDMI 1.3 Retiming Switch

The CAT6352 is a 2nd-generation four-to-one HDMI v.1.3 retiming switch that

supports a signalling rate of up to 2.25Gbps and the new Deep Color modes. A
one-port SINK system such as flat-panel TV or LCD projector could also easily
upgrade to two-port by adding an CAT6352 at the front. By default the CAT6352
operates in hardware mode and source selection in done by controlling the pins
S0 and S1. It also comes with a software mode that allows system to control it
via a two-line serial interface.

As a retiming switch, the CAT6352 equalizes and recovers incoming TMDS data
before re-transmitting them with optimal quality regardless of the incoming
signal quality. The highly acclaimed equalization technology of Chip Advanced
Technology provides for support of long or low-quality HDMI cables at eventhe
highest speeds. Input terminations of the TMDS inputs and output current levels
are both auto-calibrated. In addtion, input terminations are disconnectable and
hence significantly lower the system power consumption in inactive modes.

The CAT6352 embeds an EDID RAM to save the cost of the four external EDID ROMs.
The process of downloading the EDID data into the RAM is simplified by the
automatic read-back capability of the CAT6352, minimizing the need of MCU
intervention.

Consumer Electronics Control (CEC) is supported thruough a compliant CEC PHY.
When co-operating with MCU, the CAT6352 delivers pleasing living-room
experiences of "one remote controller fits all".

The CAT6352 also incorporates I2C repeater in its DDC, which isolates the DDC
capacitances of the two sides of the switch. This allows for longer cable
cascading as well as significantly eases the system design to pass Test ID
8-9:DDC/CEC Line Capacitance and Voltage of the HDMI Compliance Test.