DUAL SERIAL TRANSCEIVER (DST)

A block diagram of a typical application is shown in Figure 1. The 82503 Dual Serial Transceiver is a high-inte gration CMOS device designed to simplify interfacing industry standard Ethernet LAN Controllers to IEEE 802.3 local area network applications (10BASE5, 10BASE2, and 10BASE-T). The component supports both an attachment unit interface (AUI) and a Twisted Pair Ethernet interface (TPE). It allows OEMs to design a state-of-the-art media interface that is jumperless and fully automatic. The 82503 includes on-chip AUI and TPE drivers and receivers; it offers designers a cost-effective, integrated solution for interfacing LAN control lers to the wire medium.

82503 PRODUCT FEATURE SET OVERVIEW
■ Single Component Ethernet* Interface to Both 802.3 10BASE-T and AUI
■ Automatic or Manual Port Selection
■ Manchester Encoder/Decoder and Clock Recovery
■ No Glue Interface to Industry-Standard LAN Controllers
   — Intel 82586, 82590, 82593 and 82596
   — AMD 7990 (LANCE*)
   — National Semiconductor 8390 and 83932 (SONIC*)
   — Western Digital 83C690
   — Fujitsu 86950 (Etherstar*)
■ Diagnostic Loopback
■ Reset, Low Power Modes
■ Network Status Indicators
■ Defeatable Jabber Timer
■ User Test Modes
■ 10 MHz Transmit Clock Generator
■ One Micron CHMOS** IV (Px48) Technology
■ Single 5-V Supply

INTERFACE FEATURES

TPE
■ Complies with 10BASE-T, IEEE Std.
   802.3i-1990 for Twisted Pair Ethernet
■ Selectable Polarity Switching
■ Direct Interface to TPE Analog Filters
■ On-Chip TPE Squelch
■ Defeatable Link Integrity (LI)
■ Support of Cable Lengths l100m

AUI
■ Complies with IEEE 802.3 AUI Standard
■ Direct Interface to AUI Transformers
■ On-Chip AUI Squelch