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MC145421PMOTOROLAN/a82avaiISDN Universal Digital Loop Transceivers II
MC145425DWMOTOROLAN/a30avaiISDN Universal Digital Loop Transceivers II
MC145425PMOTN/a3avaiISDN Universal Digital Loop Transceivers II


MC145421P ,ISDN Universal Digital Loop Transceivers IIBLOCK DIAGRAM23B1 B2 D1 D2+LO1D CHANNEL BUFFERS7MODULATOR8 8 2 2D2I22D2–LO26D1D1I20RE2B2214LB Rx11 ..
MC145422DW ,Universal Digital-Loop Transceiver**Order this documentby MC145422/DSEMICONDUCTOR TECHNICAL DATA* ** * The MC145422 and MC145426 UDLT ..
MC145422L ,Universal digital-loop transceiver (UDLT).(8) M OTOROLAMC145422MC145426Advance informationUniversal Digital-LoopTransceivers (U DLT)The MC145 ..
MC145422P ,Universal Digital-Loop TransceiverFeatures• Signaling and Control I/O Capable of Sharing Common Bus Wiring withOther UDLTs• Variable ..
MC145423DW , Universal Digital Loop Transceiver (UDLT-3)
MC145425DW ,ISDN Universal Digital Loop Transceivers II**Order this documentby MC145421/DSEMICONDUCTOR TECHNICAL DATA** * * **(UDLT II)The MC145421 and ..
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MC68SEC000CFU10 ,M68000 USERS MANUAL ADDENDUM Order this document by M68000UMAD/ADCommunications and AdvancedConsumer Technologi ..
MC68SEC000CFU20 ,Microprocessor, sixteen 32-bit data and address registers, 16-Mbyte direct addressing range, memory-mapped input/output (I/O), 14 addressing modes, 20MHzfeatures: • Sixteen 32-Bit Data and Address Registers• 16-Mbyte Direct Addressing Range• Program Co ..


MC145421P-MC145425DW-MC145425P
ISDN Universal Digital Loop Transceivers II
--(UDLT II)
The MC145421 and MC145425 UDLTs are high–speed data transceivers
capable of providing 160 kbps full–duplex data communication over 26 AWG
and larger twisted–pair cable up to 1 km in length. These devices are primarily
used in digital subscriber voice and data telephone systems. In addition, the
devices meet and exceed the CCITT recommendations for data transfer rates
of ISDNs on a single twisted pair. The devices utilize a 512 kbaud MDPSK burst
modulation technique to supply the 160 kbps full–duplex data transfer rates.
The 160 kbps rate is provided through four channels. There are two B channels,
which are 64 kbps each. In addition, there are two D channels which are
16 kbps each.
The MC145421 and MC145425 UDLTs are designed for upward compatibility
with the existing MC145422 and MC145426 80 kbps UDLTs, as well as compa–
tibility with existing and evolving telephone switching hardware and software
architectures.
The MC145421 (Master) UDLT is designed for use at the telephone switch
line card while the MC145425 (Slave) UDLT is designed for use at the remote
digital telset or data terminal. Employs CMOS Technology in Order to Take Advantage of Its Proven
Capability for Complex Analog and Digital LSI Functions Provides Synchronous Full–Duplex 160 kbps Voice and Data
Communication in a 2B+2D Format for ISDN Compatibility Provides the CCITT Basic Access Data Transfer Rate (2B+D) for ISDNs
on a Single Twisted Pair Up to 1 km Compatible with Existing and Evolving Telephone Switch Architectures and
Call Signaling Schemes Protocol Independent Single + 5 V Power Supply MC145421EVK is Available
16 kbps D2
64 kbps B1
64 kbps B2
16 kbps D1
16 kbps D2
64 kbps B1
64 kbps B2
TWISTED PAIR
WIRE
≤ 1 km
160 kbps FULL–DUPLEX
DATA TRANSMISSION
16 kbps D1
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SEMICONDUCTOR TECHNICAL DATA
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