LMH0026_1 Datasheet, PDF (2/4 Pages) National Semiconductor (TI) – Replacing the CLC016 Replacing the CLC016 reclocker in many applications

FIGURE 1. CLC016 Typical Application
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FIGURE 2. LMH0026 Typical Application
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INPUT INTERFACE
The input common mode voltage range of the CLC016 is be-
tween 2.5V and V_CC (5V), and the minimum differential input
amplitude is 200 mV. When the CLC016 input is driven by an
equalizer such as the CLC014 (with its open collector output),
the CLC016 input interface will typically consist of 75Ω pullups
to V_CC, as shown in Figure 1.
The LMH0026 input interface is similar to that of the CLC016,
but better suited for interfacing to the 3.3V and lower supply
voltages of current generation devices. The input common
mode voltage range of the LMH0026 is from 1.2V to V_CC
(3.3V), with the same minimum differential input amplitude as
the CLC016. This input common mode voltage range allows
DC coupling to many 3.3V and 2.5V devices.
OUTPUT INTERFACE
The CLC016 outputs are open collector and require 75Ω
pullups to 5V to generate an output voltage. This structure has
some limitations when interfacing to non-5V systems. The
CLC016 outputs are essentially cut off if the SDO output volt-
age drops below V_CC-1.6V (typically 3.4V), so this prevents
DC-coupling to other 3.3V devices.
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