XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 178

• 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

REV. 1.0.2
STS-3/STM-1 TELECOM BUS INTERFACE - TRANSMIT DIRECTION
AB17
P
IN
#
STS3TxA_PL_3
TxSBFrame_3
RLOL_3
S
IGNAL
N
AME
I/O
I
S
T
IGNAL
TTL
YPE
STS-3/STM-1 Transmit Telecom Bus - Payload Indicator Signal -
Channel 3/RLOL_3 (General Purpose) input Pin:
The function of this input pin depends upon whether or not theSTS-3/
STM-1 Telecom Bus Interface for Channel 3 has been enabled.
If STS-3/STM-1 Telecom Bus (Channel 3) has been enabled -
STS-3/STM-1 Transmit Telecom Bus - Payload Indicator Signal -
Channel 3:
This input pin indicates whether or not Transmit Overhead (TOH)
bytes are being input via the TXA_D_3[7:0] input pins.
This input pin should be pulled "Low" for the duration that the STS-3/
STM-1 Transmit Telecom Bus is receiving a TOH byte, via the
TXA_D_3[7:0] input pins.
N
If STS-3/STM-1 Telecom Bus (Channel 3) is disabled - RLOL_3
(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 1 (RLOL) within the Line Interface Scan Register associated with
Channel 3 (Indirect Address = 0x4E, 0x81), (Direct Address =
0x4F81).
N
OTE
OTE
:
: For Product Legacy purposes, this pin is called RLOL_3
172
STS3TxA_CLK_3.
because one possible application is to tie this input pin to a
RLOL (Receive Loss of Lock) output pin, from one of Exar's
XRT73L0X/XRT75L0X
However, this input pin and the corresponding register bit
can be used for any purpose.
This input signal is sampled upon the falling edge of
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
D
ESCRIPTION
DS3/E3/STS-1
XRT94L43
LIU
devices.