DS99R101_13 Datasheet, PDF (18/29 Pages) Texas Instruments – DS99R101/DS99R102 3-40MHz DC-Balanced 24-Bit LVDS Serializer and Deserializer

DS99R101, DS99R102
SNLS240D – MARCH 2007 – REVISED APRIL 2013
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A termination resistor across DOUT± is also required for proper operation to be obtained. The termination
resistor should be equal to the differential impedance of the media being driven. This should be in the range of
90 to 132 Ohms. 100 Ohms is a typical value common used with standard 100 Ohm transmission media. This
resistor is required for control of reflections and also to complete the current loop. It should be placed as close to
the Serializer DOUT± outputs to minimize the stub length from the pins. To match with the deferential impedance
on the transmission line, the LVDS I/O are terminated with 100 ohm resistors on Serializer DOUT± outputs pins.
PROGRESSIVE TURN–ON (PTO)
Deserializer ROUT[23:0] outputs are grouped into three groups of eight, with each group switching about 0.5UI
apart in phase to reduce EMI, simultaneous switching noise, and system ground bounce.
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