XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 25

• 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
STS-12/STM-4 TELECOM BUS INTERFACE - TRANSMIT DIRECTION
P
G2
H1
J1
J3
IN
#
TXA_CLK
TXA_C1J1
TXA_ALARM
TXA_DP
S
IGNAL
N
AME
I/O
O
O
O
O
CMOS
CMOS
CMOS
CMOS
S
T
IGNAL
YPE
STS-12/STM-4 Transmit Telecom Bus Clock Signal:
This output clock signal functions as the clock source for the STS-12/
STM-4 Transmit Telecom Bus. All output signals (on the Transmit
STS-12/STM-4 Telecom Bus) are updated upon the rising edge of this
clock signal.
This clock signal operates at 77.76MHz and is derived from the Trans-
mit Clock Synthesizer block.
STS-12/STM-4 Transmit Telecom Bus - C1/J1 Byte Phase Indicator
Output Signal:
This output pin pulses "High" under the following two conditions.
1. Whenever the C1 byte is being output via the TxA_D[7:0] output,
and
2. Whenever the J1 byte is being output via the TxA_D[7:0] output.
N
Transmit STS-12/STM-4 Telecom Bus - Alarm Indicator Output sig-
nal:
This output pin pulses "High", corresponding to any STS-1 signal (that
is being output via the TXA_D[7:0] output pins) is carrying the AIS-P
indicator.
This output pin is "Low" for all other conditions.
STS-12/STM-4 Transmit Telecom Bus - Parity Output Pin:
This output pin can be configured to function as one of the following.
1. The EVEN or ODD parity value of the bits which are output via the
TXA_D[7:0] output pins.
2. The EVEN or ODD parity value of the bits which are being output via
the TXA_D[7:0] output pins and the states of the TXA_PL and
TXA_C1J1 output pins.
N
OTES
OTE
1. The STS-12/STM-4 Transmit Telecom Bus will indicate that it
2. The STS-12/STM-4 Transmit Telecom Bus will indicate that it
3. This output pin is only active if the STS-12/STM-4 Telecom
: Any one of these configuration selections can be made by
:
writing the appropriate value into the Telecom Bus Control
Register (Indirect Address = 0x00, 0x37), (Direct Address =
0x0137)..
is transmitting the C1 byte (via the TXA_D[7:0] output pins),
by pulsing this output pin "High" (for one period of TXA_CLK)
and keeping the TXA_PL output pin pulled "Low".
is transmitting the J1 byte (via the TXA_D[7:0] output pins),
by pulsing this output pin "High" (for one period of TXA_CLK)
while the TXA_PL output pin is pulled "High".
Bus is enabled.
19
D
ESCRIPTION
REV. 1.0.2