XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 39

• 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-3/STM-1 TELECOM BUS INTERFACE - TRANSMIT DIRECTION
AE25
P
E15
C26
IN
#
STS3TxA_CLK_0
TxSBCLK_0
DMO_0
STS3TxA_CLK_1
TxSBCLK_1
DMO_1
STS3TxA_CLK_2
TxSBCLK_2
DMO_2
S
IGNAL
N
AME
I/O
I
I
I
S
T
IGNAL
TTL
TTL
TTL
YPE
STS-3 Transmit Telecom Bus Clock Input/STM-1 Sub-Rate
Clock/DMO_0 (General Purpose) input Pin:
The function of this input pin depends upon whether or not theSTS-3/
STM-1 Telecom Bus Interface for Channel 0 has been enabled.
If STS-3/STM-1 Telecom Bus (Channel 0) has been enabled -
STS-3 Transmit Telecom Bus Transmit Clock Input - Channel 0:
This input clock signal functions as the clock source for the STS-3/
STM-1 Transmit Telecom Bus, associated with Channel 0. All input
signals (e.g., STS3TxA_ALARM_0, STS3TxA_D_0[7:0],
STS3TxA_DP_0, STS3TxA_PL_0, STS3TxA_C1J1_0) are sampled
upon the falling edge of this input clock signal.
This clock signal should operate at 19.44MHz.
If STS-3/STM-1 Telecom Bus (Channel 0) is disabled - DMO_0
(General Purpose) Input Pin:
This input pin can be used as a general purpose input pin.
The state of this input pin can be determined by reading the state of
Bit 2 (DMO) within the Line Interface Scan Register associated with
Channel 0 (Address = 0x1E, 0x81), (Direct Address = 0x1F81).
N
STS-3 Transmit Telecom Bus Clock Input/STM-1 Sub-Rate
Clock/DMO_1 (General Purpose) input Pin:
See definition of Pin # E15 above replacing Channel 0 with Channel
1.
If STS-3/STM-1 Telecom Bus (Channel 1) has been enabled -
STS-3 Transmit Telecom Bus Clock Input - Channel 1:
If STS-3/STM-1 Telecom Bus (Channel 1) is disabled - DMO_1
(General Purpose) Input Pin:
STS-3 Transmit Telecom Bus Clock Input/STM-1 Sub-Rate
Clock/DMO_2 (General Purpose) input Pin:
See definition of Pin # E15 above replacing Channel 0 with Channel
2.
If STS-3/STM-1 Telecom Bus (Channel 2) has been enabled -
STS-3 Transmit Telecom Bus Transmit Clock Input - Channel 2:
If STS-3/STM-1 Telecom Bus (Channel 2) is disabled - DMO_2 -
Drive Monitor Output Input (from XRT73L0X LIU IC) - Channel 2:
OTE
: For Product Legacy purposes, this pin is called DMO_0,
33
because one possible application is to tie this input pin to a
DMO (Drive Monitor Output) output pin, from one of Exar's
XRT73L0X/XRT75L0X
However, this input pin, and the corresponding register bit
can be used for any purpose.
D
ESCRIPTION
DS3/E3/STS-1
LIU
REV. 1.0.2
devices.