DP83223
April, 1997
DP83223 TWISTER High Speed Networking Transceiver Device
General Description
The DP83223 Twisted Pair Transceiver is an integrated
circuit capable of driving and receiving three-level (MLT-3)
encoded datastreams. The DP83223 Transceiver is
designed
to
interface
directly
with
National
Semiconductor’s Fast Ethernet and FDDI Chip Sets or
similar Physical Layer silicon allowing low cost data links
over copper based media. The DP83223 allows links of up
to 100 meters over Shielded Twisted Pair (Type-1A STP)
and Category-5 datagrade Unshielded Twisted Pair (Cat-5
UTP) or equivalent. The DP83223 is available in a 28 pin
PLCC package and a 32 pin PQFP package.
Features
s
s
s
s
s
s
s
s
s
Compatible with ANSI X3.263 TP-PMD draft standard
Allows use of Type 1 STP and Category 5 UTP cables
Requires a single +5V supply
Integrated transmitter and receiver with adaptive equal-
ization circuit
Isolated TX and RX power supplies for minimum noise
coupling
Loopback feature for board diagnostics
Digitally Synthesized transmit signal transition time con-
trol for reduced EMI
Programmable transmit voltage amplitude
Suitable for 100BASE-TX Fast Ethernet and Twisted
Pair FDDI applications
System Connection Diagrams
DP83257VF or DP83256VF-AP
PLAYER+
TX DATA
Descrambled
RX DATA
Recovered
RXDATA
DP83840A
10/100 Ethernet PHY
TXC
Phased
RX CLOCK
Recovered
RXCLOCK
RX DATA
DP83222
Stream Cipher
Scrambled
TX DATA
Scrambled
RX DATA
Signal
Detect
SIGDET
Scrambled
TX DATA
DP83223
Transceiver
PMD
Encoded
TXDATA
PMD
Encoded
RXDATA
DP83223
Transceiver
PMD
Encoded
TXDATA
PMD
Encoded
RXDATA
Magnetics
Magnetics
Twisted Pair
Media
Twisted Pair
Media
100BASE-TX
© 1997 National Semiconductor Corporation
Twisted Pair FDDI
1
NSC [ NATIONAL SEMICONDUCTOR ]
