XRT94L31IB Exar Corporation, XRT94L31IB Datasheet - Page 13

• 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)
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