XRT94L31IB Exar Corporation, XRT94L31IB Datasheet - Page 124

• Manufacturer Part Number: XRT94L31IB
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L31IB

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Product: Mapper
• Lead Free Status / RoHS Status: Contains lead / RoHS Compliant

XRT94L31
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
N
The Receive POH Overhead Output port is used to extract out the values of the POH bytes within the
incoming STS-3/STM-1 data-stream. All of the Receive POH Overhead Output port signals are updated upon
the falling edge of RxPOHClk. The timing wave-form and information for the Receive POH Overhead Output
Port is presented below.
F
1.11
S
OTE
IGURE
YMBOL
t27
t28
: The values for t27 and t28 can be found in
27. I
RECEIVE POH OVERHEAD OUTPUT PORT
RxTOHFrame
RxTOHValid
Falling edge of RxTOHClk to rising edge of RxTOHFrame and RxTOHValid
Falling edge of RxTOHClk to RxTOH output delay
RxTOHClk
LLUSTRATION OF THE
T
ABLE
RxTOH
28: T
IMING
I
NFORMATION FOR THE
T
IMING
D
ESCRIPTION
W
t27
AVE
Table 28
-
FORM OF THE
t28
124
.
R
ECEIVE
R
ECEIVE
TOH O
TOH O
VERHEAD
VERHEAD
O
-0.5ns
-0.5ns
M
UTPUT
IN
.
O
UTPUT
P
ORT
T
YP
P
.
ORT
REV. 1.0.1
0.4ns
0.5ns
M
AX
.