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DP83220 Datasheet

  • DP83220

  • 10頁

  • ETC

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DP83220 CDL Twisted Pair FDDI Transceiver Device
ADVANCE INFORMATION
October 1992
DP83220
CDL
TM
Twisted Pair FDDI Transceiver Device
General Description
The Copper Data Link (CDL) Transceiver is an integrated
circuit designed to interface directly with the National Semi-
conductor FDDI Chip Set or other FDDI PHY silicon allow-
ing low cost FDDI compatible data links over copper based
media The DP83220 Transceiver with the proper compen-
sation selected will allow links of up to 100 meters over
both Shielded Twisted Pair (STP) and Datagrade unshielded
Twisted Pair (DTP) CDL surpasses a Bit Error Rate (BER)
of
k
1
c
10
b
12
over both STP and DTP The CDL is de-
signed to meet the SDDI specification for FDDI transmission
across Type 1 STP cable when used in conjunction with the
appropriate transformer filter module from Pulse Engineer-
ing
Features
Y
Y
Y
Y
Y
Y
Y
Y
Fully compatible with current FDDI PHY standard
Fully compatible with the SDDI PMD specification
Requires a single
a
5V supply
Isolated TX and RX power supplies for minimum noise
coupling
Allows use of Type 1 STP and Category 5 DTP cables
No Transmit Clock required
Loopback feature for board diagnostics
Link Detect input provided
Block Diagram
Transmit Section
TL F 11724 鈥?1
Receive Section
TL F 11724 鈥?2
FIGURE 1 DP83220 Transceiver Block Diagram
CDL
TM
CDD
TM
CRD
TM
and PLAYER
TM
are trademarks of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 11724
RRD-B30M105 Printed in U S A

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