XRT94L31IB-L Exar Corporation, XRT94L31IB-L Datasheet - Page 121

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

Specifications of XRT94L31IB-L

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

REV. 1.0.1
N
The Transmit Section DCC Insertion Input Port provides a dedicated port for the user to insert his/her own
value for the D1, D2 and D3 bytes within the outbound STS-3/STM-1 data-stream. The user should note that
the TxSDCC input pin is sampled (by the Transmit Section DCC Insertion Input Port) upon the rising edge of
TxTOHClk. The TxSDCCEnable output signal is updated upon the falling edge of TxTOHClk. The timing
wave-form and information for the Transmit Section DCC Insertion Input Port is presented below.
F
P
1.8
S
OTE
IGURE
ORT
YMBOL
t21
t22
: The values for t21 and t22 can be found in
24. I
TRANSMIT SECTION DCC INSERTION INPUT PORT
T
ABLE
Falling edge of TxTOHClk to rising edge of TxE1F1F2Enable and
TxE1F1F2Frame
TxE1F1F2 Data to rising edge of TxTOHClk set-up time
TxE1F1E2Enb
LLUSTRATION OF THE
TxE1F1E2Fr
TxTOHClk
25: T
TxE1F1E2
IMING
I
NFORMATION FOR THE
T
IMING
D
ESCRIPTION
W
AVE
t21
Table 25
-
FORM OF THE
T
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC
RANSMIT
121
.
O
T
RDER
RANSMIT
-W
t22
IRE
O
B
RDER
YTE
-W
O
VERHEAD
IRE
-0.5ns
M
4ns
IN
B
.
YTE
I
O
NPUT
VERHEAD
T
YP
XRT94L31
P
.
ORT
I
NPUT
M
0ns
AX
.