XRT59L91ES Exar, XRT59L91ES Datasheet - Page 9

• Manufacturer Part Number: XRT59L91ES
• Description: Peripheral Drivers & Components - PCIs 1 CH E1 AFE
• Manufacturer: Exar

Specifications of XRT59L91ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

In general, if the XRT59L91 device samples a “1” on the
TxPOS input pin, then the “Transmit Section” of the
device will ultimately generate a positive polarity pulse
via the TTIP and TRing output pins (across a 1:2
transformer). Conversely, if the XRT59L91 device
samples a “1” on the “TxNEG” input pin, then the
“Transmit Section” of the device will ultimately generate
a negative polarity pulse via the TTIP and TRing output
pins (across a 1:2 transformer).
Figure 3. IIlustration on how the Terminal Equipment should apply data to the “Transmit Sec-
T xP O S
Rev. 1.0.0
T xN E G
D a ta
T xC lk
TxPO S
TxNEG
TClk
Figure 2. Illustration on how the XRT59L91 Device Samples the data on the
tion” of the XRT59L91 Device, when operating in the “Clockless” Mode
P e rio d
B it
1
tSU
1
sh o u ld co n fo rm to
G .7 0 3 T e m p la te
R Z P u lse w id th
TXPOS and TXNEG input pins
tHO
0
9
1
N o A ctivity in
T xC lk L in e
1.2.1 Operating the Transmitter in the
The user can configure the XRT59L91 device to oper-
ate in the “Clockless” mode by doing the following:
below.
N o p u lse is to b e a p p lie d
in th e se co n d h a lf o f th e
Not applying a clock signal to the TXClk input,
and either pulling this pin to VDD or letting it float.
By applying RZ (Return to Zero) data to the
TxPOS and TxNEG input pins, as illustrated
“Clockless” Mode
1
b it p e rio d
0
1
XRT59L91