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 #
39
SIGNAL NAME
E3_Ch2
40
SR/DR
41
STS-1/DS3_Ch2
TYPE
I
I
I
DESCRIPTION
E3 Select Input - Channel 2:
A "high" on this pin configures Channel 2 of the XRT7302 device to operate in
the E3 Mode.
A "low" on this pin configures Channel 2 of the XRT7302 to check the state of
the STS-1/(DS3_Ch2) input pin
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 Output Single-Rail/Dual-Rail Select:
Setting this pin "HIGH" configures the Receive Sections of both Channels, to
output data (in a Single-Rail Manner) to the Terminal Equipment.
Setting this pin "LOW" configures the Receive Section of both Channels, to
output data (in a Dual-Rail Manner) to the Terminal Equipment.
STS-1/DS3 Select Input - Channel 2:
A "high" on this pin configures the Clock Recovery Phase Locked Loop (in
Channel2 ) to set its VCO Center frequency to around 51.84 MHz (optimal for
SONET STS-1 operations).
A "low" on this pin configures the Clock Recovery Phase Locked Loop to set
its VCO Center frequency to around 44.736 MHz (optimal for DS3 operations).
NOTES:
1. The XRT7302 will ignore this pin if the E3_Ch2 pin (pin 39) is set to
"1".
2. This input pin is ignored if the XRT7302 is operating in the "Host"
Mode.
3. The user should tie this pin to GND, if the XRT7302 is going to be
operating in the "Host" Mode.
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