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4:1 HDMI/DVI Switch with Equalization AD8197B
FEATURES
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 Equalized inputs allow use of long HDMI cables www.DataSheet4U.com (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 Pre-emphasized outputs 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
FUNCTIONAL BLOCK DIAGRAM
PP_CH[1:0] PP_OTO PP_OCL PP_EQ PP_EN PP_PRE[1:0]
RESET
PARALLEL SERIAL I2C_SDA I2C_SCL I2C_ADDR[2:0] VTTI
2
2
AD8197B
CONTROL LOGIC AVCC DVCC AMUXVCC AVEE DVEE VTTO
3
CONFIG INTERFACE
+ IP_A[3:0] IN_A[3:0] – + IP_B[3:0] IN_B[3:0] – + IP_C[3:0] IN_C[3:0] – + IP_D[3:0] IN_D[3:0] –
4 4 4 4 4 4 4 4 4 4
SWITCH CORE EQ
PE
+ OP[3:0] – ON[3:0]
HIGH SPEED VTTI AUX_A[3:0] AUX_B[3:0] AUX_C[3:0] AUX_D[3:0]
BUFFERED
4 4 4 4
SWITCH CORE LOW SPEED UNBUFFERED
4
AUX_COM[3:0]
BIDIRECTIONAL
Figure 2.
GENERAL DESCRIPTION
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, surfacemount package, specified to operate over the −40°C to +85°C temperature range.
APPLICATIONS
Multiple input displays Projectors A/V receivers Set-top boxes Advanced television (HDTV) sets
TYPICAL APPLICATION
MEDIA CENTER HDTV SET HDMI RECEIVER SET-TOP BOX DVD PLAYER
04:20
PRODUCT HIGHLIGHTS
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. Input cable equalizer enables use of long cables at the input (more than 20 meters of 24 AWG cable at 2.25 Gbps). Auxiliary switch routes a DDC bus and two additional signals for a single-chip, HDMI 1.3 receive-compliant solution.
GAME CONSOLE
07015-002
AD8197B
Figure 1. Typical HDTV Application
2. 3.
Rev. 0
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