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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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1.0 Product Description
1.8 CN8223 Applications
CN8223
ATM Transmitter/Receiver with UTOPIA Interface
Figure 1-10 illustrates an example implementation of the CN8223 using a
TDK 78P7200 T3 LIU. Unused pins on the CN8223 must be tied as follows:
unused RXIN_8:0 pins tie to ground, PECL inputs RXCKI_HS±, RXIN_HS±,
and TXCKI_HS± tie to +5 V.
Figure 1-10. CN8223 Connected to TDK 78P7200
CN8223
Pin
31
TCLKO
35 TXOUT[2]
ATM Cells
Layer
34 TXOUT[1]
10
RXCKI
17
RXIN[2]
16
RXIN[1]
19
RXIN[4]
30
TXCKI
Signal
TDK 78P7200
TCLK
TNEG
TPOS
RCLK
RNEG
RPOS
LOWSIG
Pin
27
Tx
15
14
23
24
25 Rx
27
System Clock
(44.736 MHz)
1.8.1 CN8223 as a DS3 or E3 G.751 Framer without ATM Cell Delineation
The CN8223 can be used as a DS3 or an E3 G.751 framer with parallel input and
serial output by making the following changes:
Set the configuration registers for transparent operation.
Disable the parallel interface.
Disable line loopback.
In this setup, the receive frame sync pulse is on pin 43, TXOUT[5]. Data is
received on pin 56, TXOUT[6]. The receive clock is derived from the LIU device.
Data is transmitted through the parallel UTOPIA interface.
1-16
Conexant
100046C
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