Professional supply Integrated circuit IC one-stop sercvice BOM 78Q2123 LAN DISCRETE TRANSFORMER MODULES 32-QFN-EP

Product Descriptions

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. The MDI is connected to the line media via dual 1:1 isolation transformers. No external filter is required. Interface to the MAC is accomplished through an IEEE-802.3 compliant Media Independent Interface (MII). The 78Q2123/78Q2133 are intended to serve the embedded Ethernet market, tailored specifically to the needs of game consoles, broadband modems, printers, set top boxes and audio/visual equipment. It is designed for low-power consumption and operates from a single 3.3V supply. The 78Q2123 is rated for commercial temperature range and the 78Q2133 is rated for industrial temperature range.

Product Features

• Smallest 10/100 PHY available

• 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 full-featured auto-negotiation function

• Full duplex operation capable

• Automatic MDI/MDI-X cross over correction

• Register-programmable transmit amplitude

• Automatic polarity correction during autonegotiation and 10BASE-T signal reception

• Power-saving and power-down modes including transmitter disable

• 2 Programmable LED indicators (Link and Activity by default)

• User programmable Interrupt pin

• Packages: 32-QFN (5x5 mm) and 32-TQFN (5x5mm)

• Low Power (~290mW)

• Single 3.3 V r0.3V Supply

• 78Q2123 rated for 0°C to 70°C operation

• 78Q2133 rated for -40°C to 85°C operation

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