General Description
The DM9161 is a physical layer, single-chip, and low power transceiver for 100BASE-TX 100BASE-FX 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.

FEATUREs
Fully complies with IEEE 802.3u 10Base-T/100Base-TX/FX
Support Auto-Negotiation function, compliant with IEEE 802.3u
Fully integrated Physical layer single chip with direct interface to magnetic
Integrated 10Base-T and 100Base-TX transceiver
Selectable repeater or node mode
Far end fault signaling option in FX mode
Selectable MII or RMII (Reduced MII) interface, at he 100BASE-TX
Selectable GPSI (7-Wired) or MII mode at the 10Base-T.
Selectable twisted-pair or fiber mode output
Selectable full-duplex or half-duplex operation
MII management interface with maskable interrupt output capability
Provide Loopback mode for easy system diagnostics
LED status outputs indicate Link/ Activity, Speed10/100 and Full-duplex/Collision.
Single low power Supply of 3.3V with 0.35µm CMOS technology
Very Low Power consumption modes:
●Power Reduced mode (cable detection)
●Power Down mode
●Selectable TX drivers for 1:1 or 1.25:1 transformers for additional power reduction.
Compatible with 3.3V and 5.0V tolerant I/Os
48-pin LQFP small package (1x1 cm)