XRT94L43IB-F Exar Corporation, XRT94L43IB-F Datasheet - Page 317

• 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
signals (e.g., TxTOHFrame and TxTOHEnable) are updated upon the falling edge of TxTOHClk. The timing
waveform and information for the Transmit TOH Overhead Input Port is presented below.
N
The Transmit POH Overhead Input Port permits the user to insert his/her own value for the POH bytes into
either the outbound STS-1 SPE data-stream (which is output via the Transmit STS-12/STM-4 data-stream or
via the outbound STS-1 SPE data-stream (which is output via the Transmit STS-1 data-stream). The user
should note that the TxPOHIns and the TxPOH input pins are sampled (by the Transmit POH Overhead Input
Port) upon the rising edge of TxPOHClk. All of the remaining signals (e.g., TxPOHFrame and TxPOHEnable)
are updated upon the falling edge of TxPOHClk. The timing waveform and information for the Transmit POH
Overhead Input Port is presented below.
F
7.0 TRANSMIT POH OVERHEAD INPUT PORT
7.1
OTE
IGURE
S
YMBOL
: The values for t
t
t
t
15
16
17
22. T
Transmit POH Overhead Input Port
Falling edge of TxTOHClk to rising edge of TxTOHFrame and
TxTOHEnable
TxTOHIns to rising edge of TxTOHClk set-up time
TxTOH Data to rising edge of TxTOHClk set-up time
TxTOHEnable
TxTOHFram e
IMING
TxTOHClk
TxTOHIns
T
ABLE
TxTOH
W
15
AVEFORM OF THE
, t
17: T
16
and t
IMING
17
can be found in
I
D
NFORMATION FOR THE
ESCRIPTION
T
RANSMIT
t
15
Table 17
TOH O
t
16
311
VERHEAD
T
.
RANSMIT
I
NPUT
TOH O
t
17
P
-0.5ns
12ns
11ns
M
ORT
VERHEAD
IN
.
I
NPUT
T
YP
P
.
ORT
0.5ns
M
REV. 1.0.2
AX
.