DS22EV5110-EVKC National Semiconductor, DS22EV5110-EVKC Datasheet - Page 12

• Manufacturer Part Number: DS22EV5110-EVKC
• Description: DEMO KIT CAT5 EXTENDER HDMI
• Manufacturer: National Semiconductor

Specifications of DS22EV5110-EVKC

• Main Purpose: Video, Cable Extender
• Embedded: No
• Utilized Ic / Part: DS22EV5110
• Primary Attributes: DVI/HDMI Extended Reach Equalizer with Retimer and Output De-Emphasis
• Secondary Attributes: HDMI Extender for CAT5 & CAT6 Cables
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Application Information
The DS22EV5110 is a DVI/HDMI video signal reconditioning
device. The device conforms to DVI v1.0 and HDMI v1.3a
standards supporting up to 6.75 Gbps total throughput TMDS
data for 1080p with 36 bit deep color depth.
TYPICAL APPLICATION
The DS22EV5110 is used as a DVI/HDMI source device, sink
device, or a repeater device, see
DC AND AC COUPLED APPLICATIONS
The DS22EV5110 is designed to support TMDS differential
pairs with DC coupled transmission lines. It contains integrat-
ed termination resistors (50Ω), pulled up to VDD at the input
stage, and open collector outputs for DVI / HDMI signaling.
Figure 9 shows the DC coupled connection between the HD-
MI Source (ie. DS22EV5110) and HDMI Sink (ie.
DS22EV5110) devices. In the DC coupled application, the
external resistance of 24 kΩ at VOD_CRL pin is used at the
Source to ensure the VO level of 1000 mVp-p. The AC cou-
pled method connecting between the Source and the Sink
devices may be preferred to eliminate the impact of the
Figure
8. As the source de-
FIGURE 8. Typical Application Diagram
FIGURE 9. DC Coupled Application
12
vice, the output de-emphasis setting should be configured
based on the driving cable length. When used as the sink de-
vice, the levels of the equalization boost of the input data
channels should be optimized based on the receiving cable
length. The DS22EV5110 can also be used as a repeater in
an external extender box with the equalization and de-em-
phasis level settings optimized to provide the maximum cable
reach.
ground potential difference, or to use one CAT5/6 cable be-
tween two chassis. To optimize the DS22EV5110 perfor-
mance, the external resistance of 12 kΩ at the VOD_CRL pin
should be used on the Source DS22EV5110, and a pair of 50
Ω pull-up resistors should be placed close to the outputs of
the Source DS22EV5110, in order to DC bias the output driv-
er. Meanwhile, 622Ω pull-down resistors should be placed at
the inputs of the Sink DS22EV5110 device, in order to set the
input common mode to a 3.05 V. Note AC coupled configu-
ration is not compliant to the HDMI specification of Source
requirement (See Figure 10).
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