XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 283

• 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

RECEIVE TRANSPORT OVERHEAD INTERFACE
XRT94L43
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
P
AB2
AC2
AC6
AD2
AC7
AA2
AE2
AA7
AF2
E6
D3
D5
A4
A2
C9
C8
E5
IN
#
RxPOHValid_0
RxPOHValid_1
RxPOHValid_2
RxPOHValid_3
RxPOHValid_4
RxPOHValid_5
RxPOHValid_6
RxPOHValid_7
RxPOHValid_8
RxPOHValid_9
RxPOHValid_10
RxPOHValid_11
RxPOHValid_12
RxPOHValid_13
RxPOHValid_14
RxPOHValid_15
LOF
8kHz_OUT
S
IGNAL
N
AME
I/O
O
O
S
CMOS Receive SONET POH Processor Block - Path Overhead Output Port -
CMOS Receive STS-12 LOF (Loss of Frame) Indicator/8kHz Clock Output:
T
IGNAL
YPE
Valid POH Data Indicator:
These output pins, along with RxPOH_n, RxPOHClk_n and
RxPOHFrame_n function as the Receive SONET POH Processor block -
Path Overhead Output port.
These output pins will toggle "High" coincident with when valid POH data
is being output via the RxPOH_n output pins. This output is updated upon
the falling edge of RxPOHClk_n. Hence, external circuitry should sample
these signals upon rising edge of RxPOHClk_n.
The function of this output pin depends upon whether or not the 8kHz
Clock Generation feature has been enabled.
8kHZ Clock Generation Feature - not enabled (Normal Mode) - The
STS-12 Loss of Frame Indicator Output:
This output pin indicates whether or not the Receive STS-12 TOH Proces-
sor block (within the device) is declaring the LOF condition.
"Low" - Indicates that the Receive STS-12 TOH Processor block is NOT
currently declaring the LOF condition.
"High" - Indicates that the Receive STS-12 TOH Processor block is cur-
rently declaring the LOF condition.
8kHz Clock Generation Feature - Enabled - 8kHz Clock Output:
If this feature is enabled, the XRT94L43 will be configured to derive and
generate 8kHz clock output signals, from a particular STS-1 signal that is
being received via one of the 12 Receive STS-1 TOH/POH Processor
blocks.
277
D
ESCRIPTION
REV. 1.0.2