AD8191ASTZ Analog Devices Inc, AD8191ASTZ Datasheet - Page 15

• Manufacturer Part Number: AD8191ASTZ
• Description: IC,Telecom Switching Circuit,QFP,100PIN,PLASTIC
• Manufacturer: Analog Devices Inc

Specifications of AD8191ASTZ

• Function: Switch
• Circuit: 1 x 4:1
• On-state Resistance: 100 Ohm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

the auxiliary multiplexer pins. The AMUXVCC supply does not
draw any static current; therefore, it is recommended that the
resistor network tap the 5 V supplies as close to the connectors
as possible to avoid any additional voltage drop.
This precaution does not need to be taken if the DDC
peripheral circuitry is connected to the bus downstream of
the AD8191.
AUXILIARY (LOW SPEED) SWITCHING MODES
The AD8191 has three auxiliary switching modes: quad, dual,
and single. These are selected by programming the AUX_SM
bits of the auxiliary device modes register through the serial
control interface. The auxiliary switching mode is independent
of the high speed switching mode whenever the part is
controlled through the serial control interface. When the part is
controlled through the parallel control interface, however, only
quad mode is accessible and the auxiliary switching mode
cannot be independently controlled.
SOURCE A +5V
SOURCE B +5V
PIN 18 HDMI CONNECTOR
PIN 18 HDMI CONNECTOR
PIN 14 DVI CONNECTOR
PIN 14 DVI CONNECTOR
PERIPHERAL
PERIPHERAL
Figure 28. Suggested AMUXVCC Power Scheme
CIRCUITRY
CIRCUITRY
|<50mA
|<50mA
10kΩ
10kΩ
+5V INTERNAL
10MΩ
AMUXVCC
AD8191
(IF ANY)
PIN 18 HDMI CONNECTOR
PIN 18 HDMI CONNECTOR
PIN 14 DVI CONNECTOR
PIN 14 DVI CONNECTOR
|<50mA
|<50mA
10kΩ
10kΩ
PERIPHERAL
PERIPHERAL
CIRCUITRY
CIRCUITRY
+5V SOURCE C
+5V SOURCE D
Rev. 0 | Page 15 of 32
Quad Switching Mode
This is the default mode. In quad mode, the AD8191 behaves
like a 4:1 auxiliary link multiplexer, routing groups of four
auxiliary input signals to the four-signal output. The user can
select which group of inputs is routed to the output by program-
ming the AUX_CH bits of the auxiliary device modes register
through the serial control interface in accordance with the
switch mapping listed in Table 13. Alternately, the user can
select which group of inputs is routed to the output by setting
the PP_CH bus of the parallel control interface in accordance
with the switch mapping listed in Table 27.
Dual Switching Mode
In this mode, the AD8191 behaves as a locked dual [8:1]
auxiliary signal switch. The two 8:1 switches share the channel
select input and, therefore, switch together. The user selects
which two out of the eight possible input groups are routed to
the output by programming the AUX_CH bits of the auxiliary
device modes register in accordance with the switch mapping
listed in Table 14. This mode is only accessible through the
serial control interface.
Single Switching Mode
In this mode the AD8191 behaves as a single 16:1 TMDS
channel multiplexer; a single channel, out of a possible 16, is
routed to all of the outputs. The user selects which input
channel is routed to the outputs by programming the AUX_CH
bits of the auxiliary device modes register in accordance with
the switch mapping listed in Table 15. This mode is only
accessible through the serial control interface.
AD8191