CLC012AJE-TR13/NOPB National Semiconductor, CLC012AJE-TR13/NOPB Datasheet - Page 12

• Manufacturer Part Number: CLC012AJE-TR13/NOPB
• Description: IC CABLE EQUALIZER ADAPT 14-SOIC
• Manufacturer: National Semiconductor

Specifications of CLC012AJE-TR13/NOPB

• Applications: Medical
• Voltage - Supply: 4.5 V ~ 5.5 V
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Mounting Type: Surface Mount
• For Use With: SD012EVK - BOARD EVALUATION CLC012DRIVECABLE02EVK - BOARD EVAL SERDES, CLC001, 012
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Other names: *CLC012AJE-TR13; *CLC012AJE-TR13/NOPB; CLC012AJE-TR13

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Layout and Measurement
Several layout techniques can improve high speed perfor-
mance:
The input lines of the CLC012 use a 100Ω series resistors at
the input pins. This decreases the inductive effects internal
to the part to reduce ringing on fast rise and fall times. Refer
to the evaluation board layout for further suggestions on
layout for the CLC012 Adaptive Equalizer.
EQUALIZATION CURVE
The CLC012 Adaptive Cable Equalizer has a maximum
equalization response as shown in Figure 10. This response
may be obtained by forcing
pins.
• Keep input, output and AEC traces well separated
• Use balanced input termination’s
• Avoid routing traces close to the CLC012’s input trace
• Maintain common return points for components
• Use guard traces
FIGURE 10. Maximum Equalization Response
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0.5V differentially at the AEC
(Continued)
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CABLE EMULATION BOXES
Some cable emulation boxes will not mimic cables correctly.
When evaluating the CLC012, it is strongly recommended
that actual cable be used to determine the various perfor-
mance parameters.
Typical Applications
COAXIAL CABLE RECEIVER (Page 1)
The CLC012 equalizer application shown on page 1 will
equalize a variety of coaxial cables up to lengths that attenu-
ate the signal by 40 dB at 200 MHz. The application shows
the proper connection for a single cable driven with a
CLC005 driver. Loss of Signal (LOS) is connected to MUTE
to latch outputs DO and DO in the absence of an input signal
to the equalizer.
Refer to the CLC012’s evaluation board layout for additional
suggestions.
National can supply most of the major components required
to design a transmission line repeater. Figure 11 shows a
typical repeater design using the CLC005, CLC012, and the
CLC016. The design functions supported by each chip are:
CLC005: Cable connection chip
CLC012: Receive serialized digital data from incoming
CLC016: Retimes the equalized data (improving jitter)
The CLC016 is a multi-rate data retiming PLL. The circuit
(Figure 11) will work at up to 4 different data rates with no
additional components or manual tuning.
Boosts drive for transmission to next repeater or
final destinations
transmission lines
Equalizes the incoming data