XRT75R03D_06 Datasheet, PDF (12/135 Pages) Exar Corporation – EXAR DATA SHEET FORMAT TEMPLATES

XRT75R03D
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCRONIZER
REV. 1.0.4
TRANSMIT LINE SIDE PINS
PIN #
SIGNAL NAME
TYPE
30
TTIP_0
O
11
TTIP_1
21
TTIP_2
28
TRing_0
O
13
TRing_1
19
TRing_2
DESCRIPTION
Transmit TTIP Output - Positive Polarity Signal - Channel 0:
Transmit TTIP Output - Positive Polarity Signal - Channel 1:
Transmit TTIP Output - Positive Polarity Signal - Channel 2:
These output pins along with the corresponding TRING_n output pins, function
as the Transmit DS3/E3/STS-1 Line output signal drivers for a given channel, of
the XRT75R03D.
Connect this signal and the corresponding TRING_n output signal to a 1:1
transformer.
Whenever the Transmit Section of the Channel generates and transmits a posi-
tive-polarity pulse onto the line, this output pin will be pulsed to a "higher-volt-
age" than its corresponding TRING_n output pins.
Conversely, whenever the Transmit Section of the Channel generates and
transmit a negative-polarity pulse onto the line, this output pin will be pulsed to a
"lower-voltage" than its corresponding TRING_n output pin.
NOTE: This output pin will be tri-stated whenever the corresponding TxON_n
input pin or bit-field is set to "0".
Transmit Ring Output - Negative Polarity Signal - Channel 0:
Transmit Ring Output - Negative Polarity Signal - Channel 1:
Transmit Ring Output - Negative Polarity Signal - Channel 2:
These output pins along with the corresponding TTIP_n output pins, function as
the Transmit DS3/E3/STS-1 Line output signal drivers for a given channel,
within the XRT75R03D.
Connect this signal and the corresponding TTIP_n output signal to a 1:1 trans-
former.
Whenever the Transmit Section of the Channel generates and transmits a posi-
tive-polarity pulse onto the line. This output pin will be pulsed to a "lower-volt-
age" than its corresponding TTIP_n output pins.
Conversely, whenever the Transmit Section of the Channel generates and
transmit a negative-polarity pulse onto the line. This output pin will be pulsed to
a "higher-voltage" than its corresponding TTIP_n output pin.
NOTE: This output pin will be tri-stated whenever the corresponding TxON_n
input pin or bit-field is set to "0".
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