DM9161 Datasheet, PDF (1/47 Pages) List of Unclassifed Manufacturers – 10/100 Mbps FAST ETHERNET PHYSICAL LAYER SINGLE CHIP TRANSCEIVER

DM9161
10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver
1. General Description
The DM9161 is a physical layer, single-chip, and low
power transceiver for 100BASE-TX and 10BASE-T
operations. 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 DM9161
connects to the Medium Access Control (MAC) layer,
ensuring a high inter operability from different vendors.
The DM9161 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),
10BASE-TX Encoder/Decoder (ENC/DEC), and
Twisted Pair Media Access Unit (TPMAU). The
DM9161 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 DM9161 needs no external
filter to transport signals to the media in 100BASE-TX
or 10BASE-T Ethernet operation.
2. Block Diagram
100Base-TX
Transceiver
Clock
Circuit
Block
100Base-TX
PCS
MII
Interface
10Base-T
TX/RX Module
Auto-Negotiation
Biasing/
Power
Block
MII
Register
LED Driver
MII
Management
Control
Final
1
Version: DM9161-DS-F02
May 10,2002