XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 157

• Manufacturer Part Number: XRT94L43IB-F
• Description: IC MAPPER SONET/SDH OC12 516BGA
• Manufacturer: Exar Corporation

Specifications of XRT94L43IB-F

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 2.5V, 3.3V
• Package / Case: 516-BBGA
• Mounting Type: Surface Mount
• Product: Mapper
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

XRT94L43
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
SONET/SDH SERIAL LINE INTERFACE PINS
P
AE6
AF6
R4
IN
#
REFCLK
LOS
LOS-R
S
IGNAL
N
AME
I/O
I
I
I
S
T
IGNAL
TTL
TTL
TTL
YPE
77.76MHz or 622.08MHz Clock Synthesizer Reference Clock
Input Pin:
The function of this input pin depends upon whether or not the
Transmit STS-12/STM-4 Clock Synthesizer block is enabled.
If Clock Synthesizer is Enabled.
If the Transmit STS-12/STSM-4 Clock Synthesizer block is to be
used to generate the 77.76MHz and/or 622.08MHz clock signal for
the STS-12/STM-4 block, then a clock signal of either of the follow-
ing frequencies, must be applied to this input pin.
•
•
•
•
Afterwards, the appropriate data needs to be written into the Inter-
face Control Register - Byte 2 (Indirect Address = 0x00, 0x31),
(Direct Address = 0x0131) in order to;
(1) configure the Clock Synthesizer Block to accept any of the
above-mentioned signals and generate a 77.76MHz or 622.08MHz
clock signal,
(2) to configure the Clock Synthesizer to function as the Clock
Source for the STS-12/STM-4 block.
If Clock Synthesizer is NOT Enabled:
If the Transmit STS-12/STSM-4 Clock Synthesizer block is NOT to
be used to generate the 77.76MHz and/or 622.08MHz clock signal
for the STS-12/STM-4 block, then a 77.76MHz clock signal must
be applied to this input pin.
Loss of Optical Carrier Input - Primary:
The Loss of Carrier output (from the Optical Transceiver) should be
connected to this input pin.
If this input pin is pulled "High", then the Receive STS-12 TOH Pro-
cessor block will declare a Loss of Optical Carrier condition.
N
Loss of Optical Carrier Input - Redundant:
The Loss of Carrier output (from the Optical Transceiver) should be
connected to this input pin.
If this input pin is pulled "High", then the Receive STS-12 TOH Pro-
cessor block will declare a Loss of Optical Carrier condition.
N
OTE
OTE
12.96MHz
19.44MHz
51.84 MHz
77.76 MHz
151
: This input pin is only active if the Primary Port is active. This
: This input pin is only active if the Redundant Port is active.
input pin is inactive if the Redundant Port is active.
This input pin is inactive if the Primary Port is active.
D
ESCRIPTION
REV. 1.0.2