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DM9301 Datasheet Preview

DM9301 Datasheet

100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter

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DM9301
100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter
General Description
The DM9301 is a physical-layer, single-chip, low-
power media converter for 100BASE-TX/FX full
duplex repeater applications. On the TX media side,
it provides a direct interface to Unshielded Twisted
Pair Cable 5 (UTP5) for 100BASE-TX Fast Ethernet.
On the FX media side, it provides a direct interface to
a Pseudo Emitter Coupled Logic level interface
(PECL).
The DM9301 uses a low power and high
performance CMOS process. It contains the entire
physical layer functions of 100BASE-TX as defined
by IEEE802.3u, including the Physical Coding
Sublayer (PCS), Physical Medium Attachment
(PMA), Twisted Pair Physical Medium Dependent
Sublayer (TP-PMD) and a PECL compliant interface
for a fiber optic module, compliant with ANSI X3.166.
The DM9301 provides two independent clock
Block Diagram
recovery circuits to minimize bit delay through the
converter (no FIFO are used to buffer data between
the FX and TX interfaces). Furthermore, due to the
excellent rise/fall time control by a built-in wave-
shaping filter, the DM9301 needs no external filter to
transport signals to the media on the 100Base-TX
interface.
Patent-Pending Circuits
Smart adaptive receiver equalizer
Digital algorithm for high frequency clock/data
recovery circuit
High speed wave-shaping circuit
PECLSD
FXSD
RCVR
Link Status
Monitor &
LED Driver
25M FXRXCLK
125M FXRXCLK
Rise/Fall
Time
CTL
PECLRXI +/-
PECL
RCVR
25M
OSC/XTAL
RX
CRM
NRZI
to
NRZ
CGM
Serial to
Parallel
TX Code-
group
Alignment
Monitor
Scrambler
FX Code-
group
Alignment
Monitor
Parallel
to Serial
NRZ
to
NRZI
25M TPRXCLK
125M TPRXCLK
PECLTXO +/-
PECL
TXMT
NRZ
to
NRZI
Parallel
to Serial
Descrambler
Serial to
Parallel
NRZI
to
NRZ
RX
CRM
NRZI to
MLT-3
MLT-3 to
NRZI
MLT-3
Driver
Adaptive
EQ
TPTXO+/-
TPRXI+/-
Final
Version: DM9301-DS-F02
May 8, 2000
1




DAVICOM

DM9301 Datasheet Preview

DM9301 Datasheet

100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter

No Preview Available !

DM9301
100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter
Table of Contents
General Description ................................................1
Block Diagram ........................................................1
Table of contents ....................................................2
Features .................................................................3
Pin Configuration: DM9301 QFP .............................4
Pin Description .......................................................5
Functional Description ..........................................10
100Base-FX to TX Operation ................................10
T FX PECL Receiver ............................................10
T FX Receiver Clock Recovery Module ................10
T FX NRZI to NRZ Converter ...............................10
T FX Serial to Parallel Converter ..........................11
T FX Code Group Alignment Monitor ....................11
T TX Scrambler ....................................................11
T TX Parallel to Serial Converter ..........................11
T TX NRZ to NRZI Converter ...............................11
T TX NRZI to MLT-3 Converter.............................11
T TX MLT-3 Driver ...............................................11
100Base-TX to FX Operation ................................12
T TX Signal Detect ...............................................12
T TX Digital Adaptive Equalization........................12
T TX MLT-3 to NRZI Decoder...............................13
T TX Clock Recovery Module ...............................13
T TX NRZI to NRZ Decoder..................................13
T TX Serial to Parallel Converter ..........................13
T TX Code Group Monitor ....................................13
T TX Descrambler ................................................13
T FX Parallel to Serial Converter .......................... 13
T FX NRZ to NRZI Encoder ................................. 13
T Link Monitor and LED Driver ............................. 13
Absolute Maximum Ratings .................................. 14
DC Electrical Characteristics ................................ 15
AC Electrical Characteristics................................. 16
Timing Waveforms ............................................... 17
T 100BASE-TX to FX Transmit Timing Diagram ... 17
T 100BASE-FX to TX Transmit Timing Diagram ... 17
T 5-Bit Symbol 100Base-TX/FX Transmit Timing
Diagram ............................................................ 17
T 5-Bit Symbol 100Base-TX/FX Receive Timing
Diagram ............................................................ 18
Application Circuit (For Reference Only) ............... 19
Package Information............................................. 21
Ordering Information............................................. 22
Disclaimer ............................................................ 22
Company Overview .............................................. 22
Products............................................................... 22
Contact Windows.................................................. 22
Warning ............................................................... 22
2 Final
Version: DM9301-DS-F02
May 8, 2000


Part Number DM9301
Description 100Mbps Ethernet Fiber/Twisted Pair Single Chip Media Converter
Maker DAVICOM
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DM9301 Datasheet PDF






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