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.

特性 Features

■ Fully comply with IEEE 802.3 / IEEE 802.3u 10Base-T/ 100Base-TX, ANSI X3T12 TP-PMD 1995 standard

■ Support MDI/MDI-X auto crossover function (Auto-MDI)

■ Support Auto-Negotiation function, compliant with IEEE 802.3u

■ Fully integrated Physical layer transceiver On-chip filtering with direct interface to magnetic transformer

■ Selectable repeater or node mode

■ Selectable MII or RMII (Reduced MII) mode for 100Base-TX and 10Base-TX. Selectable MII or GPSI (7-Wired) mode for 10Base-T

■ 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. Support Dual-LED optional control

■ Single low power Supply of 3.3V with an advanced 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. 1: 1 transformers only when HP Auto-MDIX Enable .

■ Compatible with 3.3V and 5.0V tolerant I/Os

■ 48-pin LQFP