DM9161AEP 10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver

DM9161AEP 10/100 Mbps Fast EthernetPhysical Layer Single Chip Transceiver

General Description

The DM9161A 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 DM9161A connects to the Medium Access Control (MAC) layer, ensuring a high

inter operability from different vendors.

TheDM9161A 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 DM9161A 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 DM9161A needs no external filter to transport signals to the media in

100BASE-TX or 10BASE-T Ethernet operation.