XRT7302IQ80 View Datasheet(PDF) - Exar Corporation
Part Name
Description
MFG CO.
'XRT7302IQ80' PDF : 77 Pages View PDF
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PIN DESCRIPTION
PIN #
53
SIGNAL NAME
LOSMUTEN
54
VDDD
55
GNDA
56
GNDA
57
DMO2
58
VDDD
59
TAOS2
2 CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT7302
REV. 1.1.0
TYPE
I
****
****
****
O
****
I
DESCRIPTION
MUTE-upon-LOS Enable Input (Hardware Mode):
This input pin permits the user to configure the XRT7302 device (while it is
operating in the "Hardware Mode") to MUTE the recovered data (via the
RPOS1, RNEG1, RPOS2 and RNEG2 output pins), whenever the correspond-
ing Channel declares an LOS conditions.
Setting this input pin "high" will configure Channel 1 to automatically pull the
RPOS1 and RNEG1 output pins to "GND", whenever it is declaring an LOS
condition (thereby MUTing the data being output to the Terminal Equipment).
Similarly, Channel 2 will automatically pull the RPOS 2 and RNEG2 output
pins to "GND" whenever it is declaring an LOS condition.
Setting this input pin "low" configures Channels 1 and 2 to NOT automatically
MUTE the recovered data, whenever an LOS condition is declared.
NOTES:
1. This pin will be ignored if the XRT7302 device is operating in the
"Host" Mode.
2. The user should tie this pin to GND, if the XRT7302 device is to be
operated in the "Host" Mode.
3. This pin is internally pulled "High".
Receive Digital VDD - Channel 2
Analog Ground (Substrate Connection) - Channel 2
Receive Digital GND - Channel 2
Drive Monitor Output - Channel 2:
If no transmitted AMI signal is present on the MTIP2 and MRing2 input pins for
128±32 TxClk periods, then DMO2 will toggle and remain "high" until the next
AMI signal is detected.
Transmit Digital VDD - Channel 2
Transmit All Ones Select - Channel 2:
A "high" on this pin causes the Transmit Section, within Channel 2 to generate
and transmit a continuous AMI "All 1s" pattern to be transmitted onto the line.
The frequency of this "1s" pattern is determined by TxClk2.
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.
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