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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