XRT94L31IB-L Exar Corporation, XRT94L31IB-L Datasheet - Page 14
XRT94L31IB-L
Manufacturer Part Number
XRT94L31IB-L
Description
IC MAPPER DS3/E3/STS-1 504TBGA
Manufacturer
Exar Corporation
Datasheet
1.XRT94L31IB.pdf
(133 pages)
Specifications of XRT94L31IB-L
Applications
Network Switches
Interface
Bus
Voltage - Supply
3.14 V ~ 3.47 V
Package / Case
504-LBGA
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer:
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XRT94L31
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
PIN DESCRIPTION OF THE XRT94L31 (REV. B)
PIN #
L4
SIGNAL NAME
LOSPECL_P
I/O
I
LVPEC
L
TYPE
Loss of Optical Carrier/Signal Input - Single-Ended PECL Interface
Input - Primary Receive STS-3/STM-1 PECL Interface:
If the user is using an Optical Transceiver that contains an LOS (or Sig-
nal Detect) output pin that is of the LVPECL format, then connect this
LOS output signal to this input pin of the XRT94L31.
Configure the LOSPECL_P input pin to function as either an active-low
or active-low signal by pulling the LOSTTL input pin to the appropriate
level as described below.
If this input pin is pulled to the appropriate state such that LOS is TRUE,
then all of the following events will happen.
•
•
N
OTE
The Primary Receive STS-3 TOH Processor block will declare the
Loss of Optical Carrier condition.
The Primary Receive STS-3/STM-1 Line Interface block will declare
the LOS_Detect condition.
: If this input pin is pulled to the appropriate state such that LOS is
LOSTTL
TRUE, this (by itself) will NOT cause the Primary Receive STS-3
TOH Processor block to declare the LOS defect condition.
GND
VDD
14
LOSPECL_P
Active-Low/
Active-High
Active-High
Active-Low
DESCRIPTION
Setting this input pin "low"
configures the Receive Line
Interface block to declare the
"LOS_Detect" condition.
Setting this input pin "high"
configures the Receive Line
Interface block to declare the
"LOS_Detect" condition.
Description of
LOSPECL_P
REV. 1.0.1
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