XRT7302IQ80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IQ80' PDF : 77 Pages View PDF
XRT7302 2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
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REV. 1.1.0
PIN DESCRIPTION
PIN #
25
SIGNAL NAME
RLB1
26
VDDA
27
RRing1
28
RTIP1
29
GNDA
30
REQEN1
31
REQEN2
32
GNDA
TYPE
I
****
I
I
****
I
I
****
DESCRIPTION
Remote Loop-back - Channel 1:
This input pin, along with "LLB1" dictates which loop-back mode "Channel 1
(within the XRT7302 device) will be operating in.
A "high" on this pin (with "LLB1" being set to "low") configures Channel 1,
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
1, within the XRT7302 device, to operate in the "Digital Local Loop-back"
Mode and tristates the channel 1 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.
Receive Analog VDD - Channel 1:
Receive Ring Input - Channel 1:
This input pin, along with RTIP1 is used to receive the bipolar line signal from
the "Remote DS3/E3 Terminal".
Receive TIP Input - Channel 1:
This input pin, along with RRing1 is used to receive the bipolar line signal from
the "Remote DS3/E3/STS-1 Terminal".
Receive Analog GND - Channel 1
Receive Equalization Enable Input - Channel 1:
Setting this input pin "low" disables the Internal Receive Equalizer, within
Channel 1. Setting this pin "high" enables the Internal Receive Equalizer.
The guidelines for enabling and disabling the Receive Equalizer are described
in Section 3.2
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.
Receive Equalization Enable Input - Channel 2:
Setting this input pin "high" enables the Internal Receive Equalizer, within
Channel 2. Setting this pin "low" disables the Internal Receive Equalizer. The
guidelines for enabling and disabling the Receive Equalizer are described in
Section 3.2.
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.
Receive Analog GND - Channel 2
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