LXT907PC

LXT901/907 Universal 10BASE-T and AUI Transceivers Datasheet The LXT901 and LXT907 Universal 10BASE-T and AUI Transceivers are designed for IEEE 802.3 physical layer applications. They provide all the active circuitry to interface most standard IEEE 802.3 controllers to either the 10BASE-T media or Attachment Unit Interface (AUI). In addition to standard 10 Mbps Ethernet, they also support full-duplex operation at 20 Mbps. The LXT901 and LXT907 are identical except for the function of one pin. The LXT901 offers selectable termination impedance to allow the use of either shielded or unshielded twisted-pair cable. The LXT907 offers a signal quality error (SQE) disable function. Common LXT901 and LXT907 functions include Manchester encoding/decoding, receiver squelch and transmit pulse shaping, jabber, link testing, and reversed polity detection/correction. Integrated filters simplify the design work required for FCC-compliance EMI performance. Applications Product Features ■ Access devices (DSL, Cable Modems, and Set-Top Boxes). ■ Routers/Bridges/Switches/Hubs ■ Telecom Backplane ■ USB to Ethernet Converters Functional Features ■ Integrated Manchester Encoder/Decoder ■ 10BASE-T Transceiver ■ AUI Transceiver ■ Full-Duplex Capable (20 Mbps) Diagnostic Features ■ Four LED Drivers ■ AUI/RJ-45 Loopback ■ Remote Signaling of Link-Down and Jabber conditions Convenience Features ■ Automatic/Manual AUI/RJ-45 Selection ■ Automatic Polarity Correction ■ SQE Disable function (LXT907 only) ■ Programmable Impedance Driver (LXT901 only) ■ Power-Down Mode and four loopback modes ■ LXT901 available in 64-pin LQFP and 44- pin PLCC ■ LXT907 available in 44-pin PLCC