XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 118
XRT94L33IB-L
Manufacturer Part Number
XRT94L33IB-L
Description
IC MAPPER DS3/E3/STS-1 504TBGA
Manufacturer
Exar Corporation
Specifications of XRT94L33IB-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
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Manufacturer
Quantity
Price
Company:
Part Number:
XRT94L33IB-L
Manufacturer:
Exar Corporation
Quantity:
10 000
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XRT94L33
Rev.1.2.0.
1.1.10
The purpose of the “Transmit STS-3 TOH Processor” block is to perform the following functions.
• To generate and insert the TOH (for the “outbound” STS-3c signal) prior to transmission to the remote LTE.
• To automatically transmit the RDI-L indicator (to the remote LTE) upon detection of the following defect
conditions by the corresponding Receive STS-3 TOH Processor block.
• To transmit the RDI-L indicator upon software control.
• To automatically transmit the REI-L indicator (to the remote LTE) upon detection of B2 byte errors by the
Receive STS-3 TOH Processor block.
• To transmit the REI-L indicator upon software control.
• To transmit the AIS-L indicator (to the remote LTE) upon software command.
1.1.11
The purpose of the Transmit STS-3 PECL Interface block is to accept STS-3 data from the Transmit STS-3
TOH Processor block and to perform the following functions on this signal.
• Converting this “outbound” CMOS-level signal into the LVPECL format.
• To output this STS-3 PECL signal to either the System Back-plane (for transmission to a “Concentrator”
Board) or to an Optical Transceiver, for transmission to remote terminal equipment.
1.2
If the XRT94L33 has been configured to operate in the “1-Channel STS-3 ATM UNI/PPP” Mode, then it will
have the “Functional Architecture” as is presented below in Figure 2
a. LOS
b. LOF
c. AIS-L
d. SD
e. SF
FUNCTIONAL ARCHITECTURE OF THE XRT94L33 – 1 CHANNEL STS-3 ATM UNI/PPP MODE
T
T
HE
HE
T
T
RANSMIT
RANSMIT
STS-3/12 TOH P
STS-3 PECL I
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
NTERFACE
ROCESSOR
B
LOCK
B
118
LOCK
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