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.
The UDLT-3 incorporates into one device, all the functionality of
the MC145421 (ISDN UDLT-2 leader), MC145425 (ISDN UDLT-2
follower), MC145422 (UDLT-1 leader), and MC145426 (UDLT-1
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.
An evaluation board is available for this device.