MC145421 Datasheet, PDF (1/16 Pages) Motorola, Inc – ISDN Universal Digital Loop Transceivers II

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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
Order this document
by MC145421/D
MC145421
MC145425
24
1
P SUFFIX
PLASTIC PACKAGE
CASE 709
24
1
DW SUFFIX
SOG PACKAGE
CASE 751F
ORDERING INFORMATION
MC145421P Plastic Package
MC145425P Plastic Package
MC145421DW SOG Package
MC145425DW SOG Package
16 kbps D1
16 kbps D2
64 kbps B1
64 kbps B2
MASTER
ISDN UDLT
TWISTED PAIR
WIRE
≤ 1 km
SLAVE
ISDN UDLT
160 kbps FULL–DUPLEX
DATA TRANSMISSION
16 kbps D1
16 kbps D2
64 kbps B1
64 kbps B2
REV 2 (Replaces ADI1251)
9/95
©_MOMo_Tto_Oro_Rla,_OIn_Lc._A1995
MC145421•MC145425
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