Specifications

Repeater functions comply with IEEE 802.3 Repeater Unit specification

Eight Integral 10BASE-T transceivers utilize the required pre-distortion

transmission technique

Two Attachment Unit Interface (AUI) ports allow connection with 10BASE5

(Ethernet) and 10BASE2 (Cheapernet) networks

Design a Dumb Hub in minimum mode by using minimum external logic that

can respond to Link, Carrier Sense and Collision Status from LED

Supports one LED output per port for additional status indicators such as

Link, Partition, Carrier Sense, etc.

Built-in Jabber LED reports global Jabber information of the DM9081 Hub

Built-in Traffic LED indicates Hub global 10MHz bandwidth utilization status

Expandable to accommodate two DM9081 connections, with no external

logic required

On board PLL, Manchester encoder/decoder and FIFO

Expandable to accommodate increased number of repeater ports.

Recommended IC cascade number: under 3 and inclusive

Preamble loss effects eliminated by deep FIFO

Each port can be isolated (partitioned) and reconnected separately

Twisted Pair Link Test capability

Full amplitude and timing regeneration for retransmitted signals

Low power CMOS process with single 5V supply, 100-pin QFP package

Application

VoIP CPE (ATA, IP Phone, Video Phone)

IP STB, IPC, Internet Radio

Ordering Information

Part Number

Pin Count

Package

DM9081F

100

QFP

DM9081FP

100

QFP

(Pb-Free)

DAVICOM Semiconductor, Inc.

No.6, Li-Hsin Rd.VI, Science Park, Hsin-Chu, Taiwan, R.O.C.

TEL: 886-3-5798797

FAX: 886-3-5646929