XRT7302IQ80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IQ80' PDF : 77 Pages View PDF
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PIN DESCRIPTION
PIN #
33
SIGNAL NAME
RTIP2
34
RRing2
35
VDDA
36
RLB2
37
LLB2
38
LOSTHR2
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7302
REV. 1.1.0
TYPE
I
I
****
I
I
I
DESCRIPTION
Receive TIP Input - Channel 2:
This input pin, along with RRing2 is used to receive the bipolar line signal from
the "Remote DS3/E3/STS-1 Terminal".
Receive Ring Input - Channel 2:
This input pin, along with RTIP2 is used to receive the bipolar line signal from
the "Remote DS3/E3 Terminal".
Receive Analog VDD - Channel 2
Remote Loop-back - Channel 2:
This input pin, along with "LLB2" dictates which loop-back mode "Channel 2"
(within the XRT7302 device) will be operating in.
A "high" on this pin (with "LLB2" being set to "low") configures Channel 2,
within the XRT7302 device to operate in the "Remote Loop-back" Mode.
A "high" on this pin (with "LLB1" also being set to "high") configures Channel
2, within the XRT7302 device, to operate in the "Analog Local Loop-back"
Mode and tristates the channel 2 transmitter output.
NOTES:
1. This input pin is ignored if the XRT7302 is operating in the "Host"
Mode.
2. The user should tie this pin to GND, if the XRT7302 is going to be
operating in the "Host" Mode.
Local Loop-back - Channel 2:
This input pin, along with "RLB2" dictates which loop-back mode Channel 2
(within the XRT7302 device) will be operating in.
A "high" on this pin (with "RLB2" being set to "low") configures Channel 2
within the XRT7302 device to operate in the "Analog Local Loop-back" Mode.
A "high" on this pin (with "RLB2" also being set to "high") configures Channel
2, within the XRT7302 device, to operate in the "Digital Local Loop-back"
Mode and tristates the channel 2 transmitter output.
NOTES:
1. This input pin is ignored if the XRT7302 is operating in the "Host"
Mode.
2. The user should tie this pin to GND, if the XRT7302 is going to be
operating in the "Host" Mode.
Loss of Signal Threshold Control - Channel 2
The voltage forced on this pin controls the input loss of signal threshold for
Channel 2. Two settings are provided by forcing the LOSTHR2 pin to GND or
VDD. This pin must be set to the desired level upon power up and should not
be changed during operation.
NOTE: This pin is only applicable during DS3 or STS-1 operations.
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