Voltage References

Communication Circuits
In Brief ...
RF
Radio communication has greatly expanded its scope in
the past several years. Once dominated by public safety
radio, the 30 to 1000 MHz spectrum is now packed with
personal and low cost business radio systems. The vast
majority of this equipment uses FM or FSK modulation and
is targeted at short range applications. From mobile phones
and VHF marine radios to garage door openers and radio
control/ed toys, these new systems have become a part of
our lifestyle. Motorola Linear has focused on this technology,
adding a wide array of new products including complete
receivers processed in our exclusive 3.0 GHz MOSAIC® 1.5
process. New surface mount packages for high density
assembly are available for all of these products, as is a
growing family of supporting applications notes and
development kits.
Telephone & Voice/Data
Traditionally, an office environment has utilized two
distinctly separate wired communications systems -
Telecommunications and Data communications. Each had
its individual hardware components complement, and each
required its own independent transmission line system:
twisted wire pairs for Telecom and relatively high priced
coaxial cable for Datacom. But times have changed. Today,
Telecom and Datacom coexist comfortably on inexpensive
twisted wire pairs and use a significant number of
components in common. This has led to the development
and enhancement of PBX (Private Branch Exchanges) to
the point where the long heralded "office of the future, " with
simultaneous voice and data communications capability at
each station, is no longer of the future at all. The capability
is here today!
Motorola Semiconductor serves a wide range of
requirements for the voice/data marketplace. We offer both
CMOS and Linear technologies, each to its best advantage,
to upgrade the conventional analog voice systems and
establish new capabilities in digital communications. Early
products, such as the solid-state single-chip crosspoint
switch; the more recent monolithic Subscriber Loop
Interface Circuit (SLlC); a single-chip CodeC/Filter
(Mono-Circuit); the Universal Digital Loop Transceivers
(UDLT); basic rate ISDN (Integrated Services Digital
Network), and single-chip telephone circuits are just a few
examples of Motorola leadership in the voice/data area.
Page
RF Communications .............................. 8-2
Telecommunications ............................. 8-26
PBX Architecture (Analog Transmission) . . . . . . . . . . . .. 8-8
ISDN Voice/Data Circuits .. . . . . . . . . . . . . . . . . . . . . . .. 8-12
Voice/Data Communication (Digital Transmission) ... 8-15
Complete Electronic Telephone Circuit ............. 8-17
Tone Ringers ................................... 8-18
Speech Networks ............................... 8-19
Speakerphones ................................. 8-20
Telephone Accessory Circuits ..................... 8-22
Phase-Locked Loop Components. . . . . . . . . . . . . . . . .. 8-28
Index .......................................... 8-30
Data Sheets .................................... 8-32
Addendum .................................... 8-179