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78Q2123 - 10/100BASE-TX Transceiver

General Description

The 78Q2123 and 78Q2133, MicroPHYTM, are the smallest 10BASE-T/100BASE-TX Fast Ethernet transceivers in the market.

They include integrated MII, ENDECs, scrambler/descrambler, dual-speed clock recovery, and full-featured auto-negotiation functions.

Key Features

  • x Smallest 10/100 PHY available x 10BASE-T/100BASE-TX IEEE-802.3 compliant TX and RX functions requiring a dual 1:1 isolation transformer interface to the line x Integrated MII, 10BASE-T/100BASE-TX ENDEC, 100BASE-TX scrambler/descrambler, and full-featured auto-negotiation function x Full duplex operation capable x Automatic MDI/MDI-X cross over correction x Register-programmable transmit amplitude x Automatic polarity correction during autonegotiation and 10BASE-T signal reception x Power-savin.

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
78Q2133 10/100BASE-TX Transceiver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Simplifying System IntegrationTM 78Q2123/78Q2133 MicroPHY™ 10/100BASE-TX Transceiver DATA SHEET DESCRIPTION The 78Q2123 and 78Q2133, MicroPHYTM, are the smallest 10BASE-T/100BASE-TX Fast Ethernet transceivers in the market. They include integrated MII, ENDECs, scrambler/descrambler, dual-speed clock recovery, and full-featured auto-negotiation functions. The transmitter includes an on-chip pulseshaper 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 (Cat-5 UTP) cabling for 100BASE-TX applications, and Category-3 unshielded twisted pair (Cat-3 UTP) for 10BASE-T applications.