DP83220 Datasheet, PDF (1/10 Pages) National Semiconductor (TI) – 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 ^k1 c 10^b12 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 _{Fully compatible with current FDDI PHY standard}
Y _{Fully compatible with the SDDI PMD specification}
Y _{Requires a single} a_{5V supply}
Y _{Isolated TX and RX power supplies for minimum noise}
coupling
Y _{Allows use of Type 1 STP and Category 5 DTP cables}
Y _{No Transmit Clock required}
Y _{Loopback feature for board diagnostics}
Y _{Link Detect input provided}
Block Diagram
Transmit Section
Receive Section
TL F 11724 – 1
FIGURE 1 DP83220 Transceiver Block Diagram
TL F 11724 – 2
CDLTM CDDTM CRDTM and PLAYERTM are trademarks of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 11724
RRD-B30M105 Printed in U S A