XRT94L31IB Exar Corporation, XRT94L31IB Datasheet - Page 14

• 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

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