CLC014AJE National Semiconductor, CLC014AJE Datasheet - Page 13

• Manufacturer Part Number: CLC014AJE
• Description: 07B4822
• Manufacturer: National Semiconductor

Specifications of CLC014AJE

• Ic Function: Adaptive Cable Equalizer
• Supply Voltage Range: 4.5V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SOIC
• No. Of Pins: 14
• Termination Type: SMD
• Rohs Compliant: No
• Filter Terminals: SMD
• Data Rate Max: 650Mbps
• Lead Free Status / Rohs Status: Not Compliant

DIGITAL VIDEO (SDV) ROUTERS
The CLC014 provides performance that complies with the
SMPTE 259M standard for serial digital video (SDV) trans-
mission over coaxial cable. One common application is in
SDV routers, which provide a switching matrix for connecting
video source equipment (e.g., cameras) to destination equip-
ment (e.g., video tape recorders, monitors, etc.).
Figure 12
including equalizers, a crosspoint switch, data retimers, and
cable drivers. The CLC014 is used in its standard configura-
tion in this application, and automatically equalizes cable
lengths from zero meters to greater than 300 meters at
360 MHz (see plots in Typical Performance Characteristics
section). The equalized outputs are connected to the differ-
ential inputs of the crosspoint switch. The CLC016 Data Re-
timer receives the data from the crosspoint and performs the
clock and data recovery functions, further reducing jitter. Fi-
nally, the retimed data is driven into the coaxial cable by a
CLC006 Cable Driver (with two amplitude-adjustable outputs)
or a CLC007 Cable Driver (with four outputs).
shows a typical configuration for an SDV router,
100056 Version 11 Revision 6
FIGURE 11. Typical Repeater Design
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Print Date/Time: 2010/08/23 16:48:25
TWISTED PAIR DRIVER
A low-cost medium for transmitting data is twisted pair. Cat-
egory 5 UTP has an attenuation characteristic similar to
Belden 8281 coaxial cable but scaled in length: 120 meters
of Category 5 UTP is roughly equivalent to 300 meters of
Belden 8281 cable. When properly implemented, the CLC014
will equalize data rates up to 625 Mbps over Category 5 UTP.
The maximum data rate depends upon the cable length. A
plot of Maximum Data Rate vs Cable Length is found in the
Typical Performance Characteristics section for Belden
8281, and can be scaled as stated above to estimate maxi-
mum cable lengths and data rates for UTP.
Category 5 UTP has a characteristic impedance of approxi-
mately 100Ω. The CLC006 in
twisted pair AC-coupled with a series 0.1 μF capacitor and a
50Ω resistor in each differential output. The CLC014 Adaptive
Equalizer requires 800 mV
FIGURE 12. Video Routing Block Diagram
pp
from the transmit side of the ca-
Figure 13
is used to drive the
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