XRT7302IQ80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IQ80' PDF : 77 Pages View PDF
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PIN DESCRIPTION
PIN #
63
SIGNAL NAME
TPData2
64
TNData2
65
MTIP2
66
MRing2
67
VDDA
68
TTIP2
69
TRing2
70
GNDA
71
GNDA
72
TRing1
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7302
REV. 1.1.0
TYPE
I
I
I
I
****
O
O
****
****
O
DESCRIPTION
Transmit Positive Data Input - Channel 2:
The Transmit Section of Channel 2 will sample this pin, on the falling edge of
TxClk2. If the Channel samples a "1" at this input pin, then it will generate and
transmit a "positive" polarity pulse to the line.
NOTES:
1. The data should be applied to this input pin if the "Transmit Section" is
configured to accept Single-Rail data from the Terminal Equipment.
2. If the XRT7302 device is operating in the "Host" Mode, then the user
can (if desired) configure Channel 2 to sample the TPData2 pin on
either the rising or falling edge of TxClk2.
Transmit Negative Data Input - Channel 2:
The Transmit Section of Channel 2 will sample this pin, on the falling edge of
TxClk2. If the device samples a "1" at this input pin, then it will generate and
transmit a "negative" polarity pulse to the line.
NOTES:
1. This input pin will be ignored and should be tied to GND, if the Trans-
mit Section is configured to accept "Single-Rail" data from the Termi-
nal Equipment.
2. If the XRT7302 device is operating in the "Host" Mode, then the user
can (if desired) configure Channel 2 to sample the TNData2 pin on
either the rising or falling edge of TxClk2.
Monitor Tip Input - Channel 2:
The bipolar line output signal, from TTIP2 can be connected to this pin, via a
270-ohm resistor, in order to check for line driver failure. This pin is internally
pulled "high".
Monitor Ring Input - Channel 2:
The bipolar line output signal, from TRing2 can be connected to this pin, via a
270-ohm resistor, in order to check for line driver failure. This pin is internally
pulled "high".
Transmit Analog VDD - Channel 2:
Transmit TTIP Output - Channel 2:
The XRT7302 device will use this pin, along with TRing2, to transmit a bipolar
line signal, via a 1:1 transformer.
Transmit Ring Output - Channel 2:
The XRT7302 device will use this pin, along with TTIP2, to transmit a bipolar
line signal, via a 1:1 transformer.
Transmit Analog GND - Channel 2
Transmit Analog GND - Channel 1
Transmit Ring Output - Channel 1:
The XRT7302 device will use this pin, along with TTIP1, to transmit a bipolar
line signal, via a 1:1 transformer.
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