4:1 HDMI/DVI Switch with Equalization
4 inputs, 1 output HDMI/DVI links
Enables HDMI 1.3-compliant receiver
Pin-to-pin compatible with the AD8197A
4 TMDS channels per link
Supports 250 Mbps to 2.25 Gbps data rates
Supports 25 MHz to 225 MHz pixel clocks
www.DataSheet4U.cEoqmualized inputs allow use of long HDMI cables
(20 meters at 2.25 Gbps)
Fully buffered unidirectional inputs/outputs
Per input switchable, 50 Ω on-chip terminations
Switchable output 50 Ω on-chip terminations
Low added jitter
Single-supply operation (3.3 V)
4 auxiliary channels per link
Bidirectional unbuffered inputs/outputs
Flexible supply operation (3.3 V to 5 V)
HDCP standard compatible
Allows switching of DDC bus and 2 additional signals
Output disable feature
Reduced power dissipation
Removable output termination
Allows building of larger arrays
Two AD8197Bs support HDMI/DVI dual link
Standards compatible: HDMI receiver, HDCP, DVI
Serial (I2C slave) and parallel control interface
100-lead, 14 mm × 14 mm LQFP, Pb-free package
Multiple input displays
Advanced television (HDTV) sets
Figure 1. Typical HDTV Application
FUNCTIONAL BLOCK DIAGRAM
HIGH SPEED BUFFERED
LOW SPEED UNBUFFERED
The AD8197B is an HDMI™/DVI switch featuring equalized
TMDS® inputs and pre-emphasized TMDS outputs, ideal for
systems with long cable runs. The AD8197B offers individual
control of the on/off state of the TMDS input termination
resistors via I2C® control. Outputs can be set to a high
impedance state to reduce the power dissipation and/or to allow
the construction of larger arrays using the wire-OR technique.
The AD8197B is provided in a 100-lead LQFP, Pb-free, surface-
mount package, specified to operate over the −40°C to +85°C
1. Supports data rates up to 2.25 Gbps, enabling 1080p deep
color (12-bit color) HDMI formats and greater than UXGA
(1600 × 1200) DVI resolutions.
2. Input cable equalizer enables use of long cables at the input
(more than 20 meters of 24 AWG cable at 2.25 Gbps).
3. Auxiliary switch routes a DDC bus and two additional signals
for a single-chip, HDMI 1.3 receive-compliant solution.
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