XRT94L31IB Exar Corporation, XRT94L31IB Datasheet - Page 15

• Manufacturer Part Number: XRT94L31IB
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L31IB

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Product: Mapper
• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

REV. 1.0.1
PIN DESCRIPTION OF THE XRT94L31 (REV. B)
PIN #
L3
SIGNAL NAME
LOSPECL_R
I/O
I
LVPEC
L
TYPE
Loss of Optical Carrier/Signal Input - Single-Ended PECL Interface
Input - Redundant 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_R 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 Redundant Receive STS-3 TOH Processor block will declare the
Loss of Optical Carrier condition.
The Redundant Receive STS-3/STM-1 Line Interface block will
declare the LOS_Detect condition.Note:
: If this input pin is pulled to the appropriate state such that LOS is
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
LOSTTL
TRUE, this (by itself) will NOT cause the Redundant Receive
STS-3 TOH Processor block to declare the LOS defect
condition..
GND
VDD
15
LOSPECL_R
Active-Low/
Active-High
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
LOSPECL_R
XRT94L31