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**The LXT9781 is an eight-port PHY Fast Ethernet Transceiver that
supports IEEE 802.3 physical layer applications at both 10 Mbps and 100 Mbps. It provides a Reduced Media Independent Interface (RMII) for switching and other independent port applications. The LXT9761 offers the same features and functionality in a six-port device. This data sheet uses the singular designation “LXT97x1” to refer to both devices.**
All network ports provide a combination twisted-pair (TP) or pseudo-ECL (PECL) interface for a 10/100BASE-TX or 100BASE-FX connection.
The LXT97x1 provides three discrete LED driver outputs for each port, as well as eight global serial LED outputs. The device supports both half- and full- duplex operation at 10 Mbps and 100 Mbps, and requires only a single 3.3V power supply.Product Features
■ Six or eight IEEE 802.3-compliant 10BASE-T or 100BASE-TX ports with integrated filters
■ 3.3V operation
■ Optimized for dual-high stacked R45 applications
■ Proprietary Optimal Signal Processing™ architecture improves SNR by 3 dB over ideal analog filters
■ Robust baseline wander correction 100BASE-FX fiber-optic capability on all ports
■ Supports both auto-negotiation and legacy systems without auto-negotiation capability
■ JTAG boundary scan
■ Multiple Reduced MII (RMII) ports for independent PHY port operation
■ Configurable via MDIO port or external control pins.
■ Maskable interrupts
■ Low power consumption (390 mW per port, typical)
■ 208-pin PQFP (LXT9761 and LXT9781)
■ 272-pin PBGA (LXT9781 only)Applications
■ 100BASE-T, 10/100-TX, or 100BASE-FX Switches and multi-port NICs.
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- Datasheet: Download LXT978ALC
- Chipdatas Part: CD89-LXT978ALC
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- Last Updated: 2024/07/01 08:34 +0800
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