LXT9785 Datasheet | Intel Corporation

features included in the LXT9785E transceiver. The LXT9785E is an enhanced version of the LXT9785 that detects Data Terminal Equipment (DTE) requiring power from the switch over a CAT5 cable. The system uses the information collected by the LXT97985E to apply power if the DTE at the far end requires power over the cable, such as an IP telephone. Each network port can provide a twisted-pair (TP) or Low-Voltage Positive Emitter Coupled Logic (LVPECL) interface. The twisted-pair interface supports 10 Mbps and 100 Mbps (10BASE-T and 100BASE-TX) Ethernet over twisted-pair. The LVPECL interface supports 100 Mbps (100BASE-FX) Ethernet over fiber-optic media. The LXT9785/LXT9785E provides three discrete LED driver outputs for each port. The devices support both half-duplex and full-duplex operation at 10 Mbps and 100 Mbps and require only a single 2.5 V power supply. Applications - - Enterprise switches IP telephony switches - - Storage Area Networks Multi-port Network Interface Cards (NICs) Product Features - - - - - - - - - Eight IEEE 802.3-pliant 10BASE-T or 100BASE-TX ports with integrated filters. 100BASE-FX fiber-optic capability on all ports. 2.5 V operation. Low power consumption; 250 m W per port typical. Multiple RMII or SMII/SS-SMII ports for independent PHY port operation. Auto MDI/MDIX crossover capability. Proprietary Optimal Signal Processing™ architecture improves SNR by 3 d B over ideal analog filters. Optimized for dual-high stacked RJ-45 applications. MDIO sectionalization into 2x4 or 1x8 configurations. - - - - - - - - - Supports both auto-negotiation systems and legacy systems without auto-negotiation capability. Robust baseline wander correction. Configurable through the MDIO port or external control pins. JTAG boundary scan. 208-pin PQFP: LXT9785HC, LXT9785EHC, LXT9785HE. 241-ball BGA: LXT9785BC, LXT9785EBC. 196-ball BGA: LXT9785MBC DTE detection for remote powering applications (LXT9785E only). Extended temperature operation of -40o C to +85o...