XRT75R03IVTR Exar Corporation, XRT75R03IVTR Datasheet - Page 12

• Manufacturer Part Number: XRT75R03IVTR
• Description: IC LIU E3/DS3/STS-1 3CH 128LQFP
• Manufacturer: Exar Corporation

Specifications of XRT75R03IVTR

• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

TRANSMIT LINE SIDE PINS
XRT75R03
REV. 1.0.8
P
31
17
32
16
IN
6
5
#
S
IGNAL
MRing_0
MRing_1
MRing_2
MTIP_0
MTIP_1
MTIP_2
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
N
AME
T
YPE
I
I
Monitor Tip Input - Positive Polarity Signal - Channel 0:
Monitor Tip Input - Positive Polarity Signal - Channel 1:
Monitor Tip Input - Positive Polarity Signal - Channel 2:
These input pins along with MRING_n function as the Transmit Drive Monitor
Output (DMO) input monitoring pins. To (1) monitor the Transmit Output line
signal and (2) to perform this monitoring externally, then this pin MUST be con-
nected to the corresponding TTIP_n output pin via a 274 ohm series resistor.
Similarly, the MRING_n input pin MUST also be connected to its corresponding
TRING_n output pin via a 274 ohm series resistor.
The MTIP_n and MRING_n input pins will continuously monitor the Transmit
Output line signal via the TTIP_n and TRING_n output pins for bipolar activity.
If these pins do not detect any bipolar activity for 128 bit periods, then the
Transmit Drive Monitor circuit will drive the corresponding DMO_n output pin
"High" in order to denote a possible fault condition in the Transmit Output Line
signal path.
N
Monitor Ring Input - Channel 0:
Monitor Ring Input - Channel 1:
Monitor Ring Input - Channel 2:
These input pins along with MTIP_n function as the Transmit Drive Monitor Out-
put (DMO) input monitoring pins. To (1) monitor the Transmit Output line signal
and (2) to perform this monitoring externally, then this input pin MUST be con-
nected to the corresponding TRING_n output pin via a 274 ohm series resistor.
Similarly, the MTIP_n input pin MUST be connected to its corresponding
TTIP_n output pin via a 274 ohm series resistor.
The MTIP_n and MRING_n input pins will continuously monitor the Transmit
Output line signal via the TTIP_n and TRING_n output pins for bipolar activity.
If these pins do not detect any bipolar activity for 128 bit periods, then the
Transmit Drive Monitor circuit will drive the corresponding DMO_n output pin
"High" to indicate a possible fault condition in the Transmit Output Line signal
path.
N
OTES
OTES
1. These input pins are inactive if the user choose to internally monitor
2. Internal Monitoring is only available as an option if the XRT75R03 in is
1. These input pins are inactive if the user chooses to internally monitor
2. Internal Monitoring is only available as an option if the XRT75R03 is
:
:
the Transmit Output line signal.
being operated in the Host Mode.
the Transmit Output line signal.
being operated in the Host Mode.
9
D
ESCRIPTION
xr
xr
xr
xr