XRT5997IV View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT5997IV' PDF : 37 Pages View PDF
XRT5997
TxPOS_x
TxNEG_x
TClk_x
tSU
tHO
Figure 2. Illustration on how the XRT5997 Device Samples the data on
the TxPOS_x and TxNEG_x input pins
In general, if the XRT5997 device samples a “1” on the
TxPOS_x input pin, then the “Transmit Section” of the
device will ultimately generate a positive polarity pulse
via the TTIP_x and TRing_x output pins (across a 1:2
transformer). Conversely, if the XRT5997 device
samples a “1” on the “TxNEG_x” input pin, then the
“Transmit Section” of the device will ultimately gener-
ate a negative polarity pulse via the TTIP_x and TRing_x
output pins (across a 1:2 transformer).
1.2.1 Operating the Transmitter in the
“Clockless” Mode
The user can configure a given channel (within the
XRT5997 device) to operate in the “Clockless” mode by
doing the following:
• Not applying a clock signal to the TxClk_x input,
and either pulling this pin to VDD or letting it float.
• By applying RZ (Return to Zero) data to the
TxPOS_x and TxNEG_x input pins, as illustrated
below.
Rev. 1.0.0
20
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