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28233-11 View Datasheet(PDF) - Conexant Systems

Part NameDescriptionManufacturer
28233-11 ATM Transmitter/Receiver with UTOPIA Interface Conexant
Conexant Systems Conexant
28233-11 Datasheet PDF : 161 Pages
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ATM Transmitter/Receiver with UTOPIA Interface
2.0 Functional Description
2.2 Line Framers High-Speed
PECL Transmit Interface
For STS-3c, STM-1, or E4, the high-speed PECL interface is used. This mode is
used in any case where an external LIU/decoder is used (such as E4 and
STS-3c/STM-1 CMI decoding). If the mode is set to E4 or STS-3c/STM-1 in
CONFIG_1, then the outputs are taken from the HS±versions of the output
pins. The TCLKO (and TCLKO_HS±) phase shown can be inverted with the
Invert TX Clock Output control bit.
Table 2-3 lists the interface connections for the internal framing mode without
line encoding. Figure 2-4 illustrates the interface timing when the internal
B3ZS/HDB3 encoder is disabled.
Table 2-3. Internal Framing Unencoded Transmitter Connections (STS-3c, STM-1, E4)
Signal Name
Connect to CN8223 Pin
Transmit Clock Input (TXCKI)
Transmit Data (TXDATO)
Transmit Clock Output (TCLKO)
Figure 2-4. Internal Framer Transmitter Interface Timing Without Line Encoding
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