4:1 HDMI/DVI Switch with Equalization

AD8191A

Rev. 0

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FEATURES

4 inputs, one output HDMI/DVI link

Pin-to-pin compatible with the AD8197A

4 TMDS channels per link

Supports 250 Mbps to 1.65 Gbps data rates

Supports 25 MHz to 165 MHz pixel clocks

Equalized inputs for operation with long HDMI cables

(20 meters at 1080p)

Fully buffered unidirectional inputs/outputs

Globally switchable, 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 AD8191As support HDMI/DVI dual link

Standards compatible: HDMI receiver, DVI, HDCP

100-lead, 14 mm × 14 mm LQFP, Pb-free package

APPLICATIONS

Multiple input displays

Projectors

A/V receivers

Set-top boxes

Advanced television (HDTV) sets

FUNCTIONAL BLOCK DIAGRAM

LOW SPEED UNBUFFERED

HIGH SPEED

BUFFERED

AVCC

DVCC

AMUXVCC

AVEE

DVEE

VTTO

OP[3:0]

AUX_COM[3:0]

ON[3:0]

+

–

4

BIDIRECTIONAL

I2C_SDA

I2C_SCL

I2C_ADDR[2:0]

VTTI

VTTI

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]

AUX_C[3:0]

AUX_B[3:0]

AUX_A[3:0]

AUX_D[3:0]

+

–

4

4

4

4

4

4

4

4

4

4

4

4

EQ

SWITCH

CORE

SWITCH

CORE

CONTROL

LOGIC

CONFIG

INTERFACE

3

2

2

SERIAL

PARALLEL

RESET

PE

4

4

AD8191A

Figure 1.

TYPICAL APPLICATION

DVD PLAYER

GAME CONSOLE

SET-TOP BOX

MEDIA CENTER

HDTV SET

HDMI

RECEIVER

AD8191A

01:18

Figure 2. Typical HDTV Application

GENERAL DESCRIPTION

The AD8191A is an HDMI™/DVI switch featuring equalized

TMDS® inputs and pre-emphasized TMDS outputs, ideal for

systems with long cable runs. 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 AD8191A is provided in a 100-lead LQFP, Pb-free, surface-

mount package specified to operate over the −40°C to +85°C

temperature range.

PRODUCT HIGHLIGHTS

1. Supports data rates up to 1.65 Gbps, enabling 1080p HDMI

formats and 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 1080p).

3. Auxiliary switch routes a DDC bus and two additional

signals for a single-chip, HDMI 1.2a receive-compliant

solution.