XRT75R03IVTR Exar Corporation, XRT75R03IVTR Datasheet - Page 75

• 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

xr
xr
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR
xr
xr
B
IT
N
4
UMBER
Analog LOS Defect
Declared
N
AME
T
R/O
YPE
D
V
EFAULT
ALUE
0
72
Analog LOS Defect Declared:
This READ-ONLY bit-field indicates whether or not the
Analog LOS (Loss of Signal) detector is declaring the LOS
Defect condition.
For DS3 and STS-1 applications, the Analog LOS Detector
will declare the LOS Defect condition whenever it deter-
mines that the amplitude of the pulses (within the incoming
DS3/STS-1 line signal) drops below a certain Analog LOS
Defect Declaration threshold level.
Conversely, (again for DS3 and STS-1 applications) the
Analog LOS Detector will clear the LOS Defect condition
whenever it determines that the amplitude of the pulses
(within the incoming DS3/STS-1 line signal) has risen
above a certain Analog LOS Defect Clearance threshold
level.
It should be noted that, in order to prevent "chattering"
within the Analog LOS Detector output, there is some built-
in hysteresis between the Analog LOS Defect Declaration
and the Analog LOS Defect Clearance threshold levels.
0 - Indicates that the Analog LOS Detector is NOT declar-
ing the LOS Defect Condition.
1 - Indicates that the Analog LOS Detector is currently
declaring the LOS Defect condition.
N
OTES
1. LOS Detection (within each channel of the
2. The current LOS Defect Condition (for the
:
XRT75R03) is performed by both an Analog LOS
Detector and a Digital LOS Detector. The LOS
state of a given Channel is simply a WIRED-OR
of the LOS Defect Declare states of these two
detectors.
channel) can be determined by reading out the
contents of Bit 1 (Receive LOS Defect Declared)
within this register.
D
ESCRIPTION
XRT75R03
REV. 1.0.8