MC145423

Universal Digital Loop Transceiver (UDLT-3) Evaluation Module

ApplicationCircuit Atthefrequenciesofinterest(128kHzand256kHz),ordinarytelephonewirehasacharacteristic impedanceofabout110W.Intheschematicabove,loadingresistorsR19–22betweenLO1andLO2and theTxwindingsofthetransformeraresetto110W.Theseriescombinationo

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MC145423

Universal Digital Loop Transceiver (UDLT-3); \n•VDD = 4.5 V to 5.5 V\n•28-Pin SOIC and TSSOP Packages\n•Protocol Independent\n•Pin Controlled Power-Down\n•LI Sensitivity Control in Master Mode\n•2.048 MHz Output in Slave Mode\nUDLT-2 \n•Synchronous Full Duplex 160 kbps Voice and Data\nCommunications in a 2B+2D Format for ISDN Compatibility\n•Provides CCITT Basic Access Data Transfer Rate (2B+D) for\nISDNs on a Single Twisted Pair Up to 1 km on 26 AWG or\nLarger Cable\nUDLT-1 \n•Pin Controlled Loopback\n•Automatic Power-Up/Down (Slave)\n•Full Duplex Synchronous 64 kbps Voice/Data Channel and Two\n8 kbps Signaling Data Channels Over One 26 AWG Wire Pair Up\nto 2 km\n;

Overview The MC145423 is a CMOS integrated circuit designed to be one of the major building blocks in digital subscriber voice/data telephone systems and remote data acquisition and control systems.\n The UDLT-3 incorporates into one device, all the functionality of the MC145421 (ISDN UDLT-2 master), MC145425 (ISDN UDLT-2 slave), MC145422 (UDLT-1 master), and MC145426 (UDLT-1 slave).\n Since these modes/functions are pin selectable, the MC145423 can be used in telephone switch line cards, as well as remote digital telsets or data terminals.\n An evaluation board is available for this device.

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MC145423DT

Universal Digital Loop Transceiver (UDLT-3)

UniversalDigitalLoopTransceiver(UDLT-3) PinSelectableMaster/Slave LimitedDistanceModem TheMC145423isaCMOSintegratedcircuitdesignedtobeoneofthemajorbuildingblocksindigitalsubscribervoice/datatelephonesystemsandremotedataacquisitionandcontrolsystems. TheUDLT-

MC145423DW

Universal Digital Loop Transceiver (UDLT-3)

UniversalDigitalLoopTransceiver(UDLT-3) PinSelectableMaster/Slave LimitedDistanceModem TheMC145423isaCMOSintegratedcircuitdesignedtobeoneofthemajorbuildingblocksindigitalsubscribervoice/datatelephonesystemsandremotedataacquisitionandcontrolsystems. TheUDLT-

MC145423E

Universal Digital Loop Transceiver (UDLT-3)

UniversalDigitalLoopTransceiver(UDLT-3) PinSelectableMaster/Slave LimitedDistanceModem TheMC145423isaCMOSintegratedcircuitdesignedtobeoneofthemajorbuildingblocksindigitalsubscribervoice/datatelephonesystemsandremotedataacquisitionandcontrolsystems. TheUDLT-

MC145423EVK

Universal Digital Loop Transceiver (UDLT-3) Evaluation Module

ApplicationCircuit Atthefrequenciesofinterest(128kHzand256kHz),ordinarytelephonewirehasacharacteristic impedanceofabout110W.Intheschematicabove,loadingresistorsR19–22betweenLO1andLO2and theTxwindingsofthetransformeraresetto110W.Theseriescombinationo

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