XRT94L31IB-L Exar Corporation, XRT94L31IB-L Datasheet - Page 13
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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Quantity
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Manufacturer:
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REV. 1.0.1
PIN DESCRIPTION OF THE XRT94L31 (REV. B)
AG25
PIN #
SIGNAL NAME
LOSTTL_R
I/O
I
TTL
TYPE
Loss of Optical Carrier Input - Redundant Receive STS-3/STM-1
PECL Interface - TTL Input:
If the user is using the Optical Transceiver that contains an LOS (or Sig-
nal Detect) output that is of the CMOS/TTL format, then connect this
LOS output signal to this input pin of the XRT94L31.
Configure the LOSTTL_R input pin to either an active-low or an active-
high signal, by pulling the LOSPECL_R 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.
The Redundant Receive STS-3 TOH Processor block wil declare the
Loss of Optical Carrier condition
The Redundant Receive STS-3/STM-1 Line Interface block will declare
the LOS_Detect condition.
N
OTE
: If this input pin is pulled to the appropriate state such that LOS is
LOSPECL_R
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
TRUE, this (by itself) will NOT cause the Redundant Receive
STS-3 TOH Processor block to declare the LOS defect
condition.
GND
VDD
13
Active-Low/
Active-High
LOSTTL_R
Active-High
Active-Low
DESCRIPTION
Setting this input pin "low"
configures the Redundant
Receive Line Interface block
to declare the "LOS_Detect"
condition.
Setting this input pin "high"
configures the Redundant
Receive Line Interface block
to declare the "LOS_Detect"
condition.
Description of LOSTTL_R
XRT94L31
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