dp83220 National Semiconductor Corporation, dp83220 Datasheet

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dp83220

Manufacturer Part Number
dp83220
Description
Cdl Twisted Pair Fddi Transceiver Device
Manufacturer
National Semiconductor Corporation
Datasheet
C 1995 National Semiconductor Corporation
DP83220
CDL
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
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
Block Diagram
CDL
k
TM
1
CDD
c
TM
TM
10
CRD
b
TM
Twisted Pair FDDI Transceiver Device
12
and PLAYER
over both STP and DTP The CDL is de-
TM
are trademarks of National Semiconductor Corporation
TL F 11724
FIGURE 1 DP83220 Transceiver Block Diagram
Transmit Section
Receive Section
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
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
ADVANCE INFORMATION
a
5V supply
RRD-B30M105 Printed in U S A
TL F 11724 – 1
October 1992
TL F 11724 – 2

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dp83220 Summary of contents

Page 1

... 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 100 meters over both Shielded Twisted Pair (STP) and Datagrade unshielded ...

Page 2

Functional Description The CDL Transceiver consists of nine major functional blocks as shown in Figure 1 The Transmit section includes the following the Delay Line the Delay Line Calibrator the Media Format Logic and the Current Output Driver ...

Page 3

... Differential 100K compatible 4B5B NRZI g transmit data inputs originating from the DP83251 55 Physi- cal Layer Device (PLAYER ) TM 28-Pin PLCC Order Number DP83220V See NS Package Number V28A FIGURE 2 Pin Configuration TXO (9 8) Differential current driver outputs precompen- g sated for twisted pair cable ...

Page 4

Electrical Characteristics ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Logic Power CC RXV Received Power CC TXV Transmit Power CC EXTV ECL Output Power Output Current (High) ECL ESD T Storage Temperature storage 4 1 RECOMMENDED ...

Page 5

Electrical Characteristics (Continued) FIGURE 4 I Diagram CC FIGURE 5 Signal Detect Threshold 11724 – 11724 – 6 ...

Page 6

Electrical Characteristics (Continued) FIGURE 6 Transmit Timing FIGURE 7 Receive Timing 11724 – 11724 – 8 ...

Page 7

Electrical Characteristics 4 3 TRANSMIT DATA AND CURRENT DRIVER OUTPUT TXDn FIGURE 8 Typical Pre-Emphasized Current Waveform I TABLE I Media Select Mode MSEL k STP DTP 3 7V SDDI Float ...

Page 8

Electrical Characteristics Refer to the Pulse Engineering datasheet for detailed information on the 8 3 SDDI magnetics module FIGURE 9 Typical Schematic for SDDI Application (Continued 11724 – 10 ...

Page 9

9 ...

Page 10

... Italiano National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications Order Number DP83220V NS Package Number V28A 2 A critical component is any component of a life ...

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