IEEE 802.3 10BASE-T Transceiver

The Motorola 10BASE–T transceiver, designed to comply with the ISO 8802–3 [IEEE 802.3] 10BASE–T specification, will support a Medium Dependent Interface (MDI) in an embedded Media Attachment Unit (MAU)*. The interface supporting the Data Terminal Equipment (DTE) is TTL, CMOS, and raised ECL compatible, and the interface to the Twisted Pair (TP) media is supported through standard 10BASE–T filters and transformers. Differential data intended for the TP media is provided a 50 ns pre–emphasis and data at the TP receiver is screened by Smart Squelch circuitry for specific threshold, pulse width, and sequence requirements.

The MC34055 is manufactured on a BiCMOS process and is packaged in a 24 pin SOIC.

• BiCMOS Technology for Low Power Operation

• Standard 5.0 V, ± 5 Voltage Supply

• Smart Squelch Enforcement of Threshold, Pulse Width, and Sequence Requirements

• Driver Pre–Emphasis for Output Data

• TTL, CMOS and Raised ECL Compatible

• Interfaces to TP Media with Standard 10BASE–T Filters and Transformers

• LED Capable Status Outputs for Collision, Jabber Detection, and Link Integrity

• Directly Driven or Crystal Controlled Clock Oscillator

• Selectable Full–Duplex Operation

• Signal Quality Error Test Pin

• Selectable Loop Back