Buffered 2:1 TMDS Switch with Equalization

The AD8194 is a low cost quad 2:1 TMDS® switch for high speed HDMI™/DVI video applications. The AD8194 features equalized inputs, ideal for systems with long cable runs. Its primary function is to switch the high speed signals from one of two single-link (HDMI or DVI) sources to the single-link output. The AD8194 is a fully buffered switch solution with 50 Ω input and output terminations, providing full-swing output signal recovery and minimizing reflections for improved system signal integrity.

The AD8194 is provided in a space-saving, 32-lead, LFCSP, surface-mount, RoHS-compliant, plastic package and is specified to operate over the −40°C to +85°C temperature range.

Product Highlights

* Data supports rates up to 2.25 Gbps, enabling greater than

1080p deep color (12-bit color) HDMI formats and greater

than UXGA (1600 × 2300) DVI resolutions.

* Fully buffered inputs and outputs.

* Input cable equalizer enables use of long cables at the

input. For a typical 24 AWG cable, the AD8194 compensates for more than 20 m at data rates up to 2.25 Gbps.

* Matched 50 Ω on-chip input and output terminations

improve system signal integrity.

* Single-pin source select bit.

* Low added jitter.

Applications

* Advanced television (HDTV) sets

* Multiple input displays

* Projectors

* A/V receivers

* Set-top boxes

* 2 inputs, 1 output HDMI/DVI high speed signal switch

* Pin-to-pin compatible with the AD8193

* Enables HDMI 1.3-compliant receiver

* 4 TMDS channels per input/output

* Supports 250 Mbps to 2.25 Gbps data rates

* Supports 25 MHz to 225 MHz pixel clocks

* Fully buffered unidirectional inputs/outputs

* Equalized inputs for operation with long HDMI cables

* (20 m at 2.25 Gbps)

* Matched 50 Ω input and output on-chip terminations

* Low added jitter

* Single-supply operation (3.3 V)

* Standards compliant: HDMI receiver, DVI

* 32-lead, 5 mm × 5 mm, RoHS-compliant LFCSP