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78Q2120C - 10/100BASE-TX Transceiver

Description

The 78Q2120C is a 10BASE-T/100BASE-TX Fast Ethernet transceiver.

It includes integrated MII, ENDECs, scrambler/descrambler, dual-speed clock recovery, and full-featured auto-negotiation function.

The transmitter includes an on-chip pulse-shaper and a low-power line driver.

Features

  • JULY 2005.
  • 10BASE-T/100BASE-TX IEEE-802.3 compliant TX and RX functions requiring a dual 1:1 isolation transformer interface to the line.
  • Integrated MII, 10BASE-T/100BASE-TX ENDEC, 100BASE-TX scrambler/descrambler, and fullfeatured auto-negotiation function.
  • Full duplex operation capable.
  • PCS Bypass supports 5-bit symbol interface.
  • Register-programmable transmit amplitude.
  • Dual speed digital clock recovery.
  • Automatic polarity corre.

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Datasheet Details

Part number 78Q2120C
Manufacturer Teridian
File Size 240.39 KB
Description 10/100BASE-TX Transceiver
Datasheet download datasheet 78Q2120C Datasheet

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Full PDF Text Transcription

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78Q2120C 10/100BASE-TX Transceiver DATA SHEET DESCRIPTION The 78Q2120C is a 10BASE-T/100BASE-TX Fast Ethernet transceiver. It includes integrated MII, ENDECs, scrambler/descrambler, dual-speed clock recovery, and full-featured auto-negotiation function. The transmitter includes an on-chip pulse-shaper and a low-power line driver. The receiver has an adaptive equalizer and a baseline restoration circuit required for accurate clock and data recovery. The transceiver interfaces to Category-5 unshielded twisted pair (Cat5 UTP) cabling for 100BASE-TX/10BASE-T and Category-3 unshielded twisted pair for 10BASE-T. Connection to the line media is via 1:1 isolation transformers. No external filter is required. Interface to the MAC is accomplished through an IEEE-802.
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