Datasheet

AD8192
Rev. 0 | Page 20 of 28
APPLICATIONS INFORMATION
0.01uF
47
kΩ
47
kΩ
1kΩ
47
kΩ
47
kΩ
1kΩ
+5V
+5
V
+3.3
V
DDC_SCL
DDC_SDA
CEC
HPD
TMDS
TMDS
D2+
D2–
D1+
D1–
D0+
D0–
CLK+
CLK–
2kΩ
ESD
PROT.
(OPTIONAL)
AMUXVCC
VREF_AB
AVCC, DVCC
VTTI, VTTO
EDID
EEPROM
HDMI
RECEIVER
0.01uF
+5V
DDC_SCL
DDC_SDA
CEC
HPD
TMDS
D2+
D2–
D1+
D1–
D0+
D0–
CLK+
CLK–
2kΩ
SCL_COM
SDA_COM
SCL_A
SDA_A
SCL_B
SDA_B
I2C_SCL
I2C_SDA
I2C_ADDR
MCU
+3.3V OR +5V
VREF_COM
HPD_A
2kΩ2kΩ
2kΩ2kΩ
+3.3V
1kΩ
IPA3
INA3
IPA2
INA2
IPA1
INA1
IPA0
INA0
IPB3
INB3
IPB2
INB2
IPB1
INB1
IPB0
INB0
OUTP3
OUTN3
OUTP2
OUTN2
OUTP1
OUTN1
OUTP0
OUTN0
CEC_I/O
CEC_O/I
AVEE, DVEE
HPD_B
AD8192
D2+
D2–
D1+
D1–
D0+
D0–
CLK+
CLK–
ESD
PROT.
(OPTIONAL)
EDID
EEPROM
07050-030
Figure 30. Typical Simplified Schematic
The AD8192 is an HDMI/DVI switch featuring equalized TMDS
inputs, pre-emphasized TMDS outputs, and buffered auxiliary
signals. It is intended for use as a 2:1 switch in systems with long
cable runs on both the input and/or the output, and is fully
HDMI 1.3a transmit and receive compliant.
PINOUT
By default, the AD8192 is designed to have an HDMI/DVI
receiver pinout at its input and a transmitter pinout at its
output. However, the input/output mapping of the AD8192 is
completely programmable via the serial control interface. This
allows a designer to integrate the AD8192 into virtually any
application without requiring the use of vias on the TMDS
traces in the PCB layout.
In addition to 12 dB of input equalization, the AD8192 provides
up to 6 dB of output pre-emphasis that boosts the output TMDS
signals and allows the AD8192 to precompensate when driving
long PCB traces or output cables. The net effect of the input
equalization and output pre-emphasis of the AD8192 is that the
AD8192 can compensate for the signal degradation of both input
and output cables; it acts to reopen a closed input data eye and
transmit a full swing HDMI signal to an end receiver.
The AD8192 also provides a distinct advantage in receive-type
applications because it is a fully buffered HDMI/DVI switch;
the AD8192 fully buffers and electrically decouples the outputs
from the inputs for both the TMDS and the auxiliary lines. There-
fore, the effects of any vias placed on the output signal lines are
not seen at the input of the AD8192. The programmable output
terminations also improve signal quality at the output of the
AD8192. Thus, the PCB designer has significantly increased
flexibility in the placement and routing of the output signal path
with the AD8192 over other solutions.