General Description
The LXT9782 is an eight-port PHY Fast Ethernet Transceiver that supports IEEE 802.3 physical layer applications at both 10 and 100 Mbps. The LXT9762 offers the same features and functionality in a six-port device. This data sheet uses the singular designation “LXT97x2” to refer to both devices.
The LXT97x2 interfaces multiple Serial Media Independent Interface (SMII) compliant controllers to 10BASE-T and/or 100BASE-TX media.
All network ports provide a combination twisted-pair (TP) or pseudo-ECL (PECL) interface for a 10/100BASE-TX or 100BASE-FX connection.
The LXT97x2 provides three discrete LED drivers for each port, and eight global serial LED outputs. It supports both half- and full-duplex operation at 10 and 100 Mbps and requires only a single 3.3V power supply.

Product Features
*Multiple independent IEEE 802.3-compliant 10/100 ports with integrated filters
*Proprietary Optimal Signal Processing (OSP™) design improves SNR by 3 dB over ideal analog filters
*Robust baseline wander correction for improved 100BASE-TX performance
*100BASE-FX fiber-optic capability on all ports
*Supports both auto-negotiation and legacy systems without auto-negotiation capability
*JTAG boundary scan
*Multiple Serial MII (SMII) ports for independent PHY port operation
*Configurable via MDIO port or external control pins
*Maskable interrupts
*Very low power consumption (400 mW per port, typical)
*3.3V operation
*208-pin PQFP and 272-lead BGA
*0-70oC ambient temperature range

Application
*100BASE-T, 10/100-TX, or 100BASE-FX Switches and multi-port NICs.

LXT9782

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