MC145422: Universal Digital Loop Transceiver - Leader ARCHIVED

The MC145422 and MC145426 UDLTs are high-speed data transceivers that provide 80 kbps full-duplex data communication over 26 AWG and larger twisted-pair cable up to two kilometers in distance. Intended primarily for use in digital subscriber voice/data telephone systems, these devices can also be used in remote data acquisition and control systems. These devices utilize a 256 kilobaud modified differential phase shift keying burst modulation technique for transmission to minimize RFI/ EMI and crosstalk. Simultaneous power distribution and duplex data communication can be obtained using a single twisted-pair wire.

These devices are designed for compatibility with existing, as well as evolving, telephone switching hardware and software architectures.

The UDLT chip-set consists of the MC145422 Leader UDLT for use at the telephone switch linecard and the MC145426 Follower UDLT for use at the remote digital telset and/or data terminal.

The devices employ CMOS technology in order to take advantage of their reliable low-power operation and proven capability for complex analog/digital LSI functions.