DM9161BIEP Datasheet, PDF (1/2 Pages) Davicom Semiconductor, Inc. – 10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

DM9161BIEP Product Brief
10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver
November 2008 Rev.1.0
The DM9161BI is a physical layer, single-chip, and low power transceiver for
100BASE-TX and 10BASE-T operations. Supports Industrial-grade: -40℃.~ +85℃,On the
media side, it provides a direct interface either to Unshielded Twisted Pair Category 5 Cable
(UTP5) for 100BASE-TX Fast Ethernet, or UTP5/UTP3 Cable for 10BASE-T Ethernet.
Through the Media Independent Interface (MII), the DM9161BI connects to the Medium
Access Control (MAC) layer, ensuring a high inter operability from different vendors.
TheDM9161BI uses a low power and high performance advanced 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), 10BASE-TX Encoder/Decoder (ENC/DEC), and
Twisted Pair Media Access Unit (TPMAU). The DM9161BI provides a strong support for the
auto-negotiation function, utilizing automatic media speed and protocol selection.
Furthermore, due to the built-in wave shaping filter, the DM9161BI needs no external filter to
transport signals to the media in 100BASE-TXBASE-TX or 10BASE-TBASE-T Ethernet
operation.
Block Diagram
25M OSCI
TX CGM
LED1-4#
LED
Driver
MII
Signals
4B/5B
Encoder
Scrambler
Parallel
to Serial
NRZ
to
NRZI
NRZI to
MLT-3
MLT-3
Driver
100TXD+/-
MII
Interface/
Control
25M CLK
Rise/Fall
Time
CTL
125M CLK
AutoMDIX
4B/5B
Decoder
Code-
group
Alignment
Descrambler
Serial to
Parallel
Digital
Logic
NRZI
to
NRZ
RX
CRM
MLT-3 to
NRZI
Adaptive
EQ
RXI+/-
10BASE-T ^RX
Module _TX
RXI+/-
10TXD+/-
Register
Collision
Detection
Carrier
Sense
Auto-
Negotiation