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SA9401 Datasheet

  • SA9401

  • UNIVERSAL PABX TONE GENERATOR

  • 16頁

  • SAMES

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sames
FEATURES
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Generates PBX supervisory tones in
PCM format
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SA9401
UNIVERSAL PABX TONE GENERATOR
Each of these tone streams selectable
from 16 tone blocks
Seperate Intrude Tone for each pro-
gram
Choice of clock frequencies
Watchdog facility
Low power CMOS technology
Integrated time slot allocation circuitry
No noticeable level changes in tones
Frame synch. signal source (internal/
external) selectable
Eight tone programs
Eight independent PCM tone streams
within each program
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PROGRAMMABLE FEATURES
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Tone samples
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Intrude tone frequency
Intrude tone cadence
"silence sample" value
Tone Cadence timing
Tone to time-slot mapping
Size of tone blocks
DESCRIPTION
The SA9401 operates in conjunction with a standard EPROM to generate the system
tone plans for the PABX systems of most major countries.
The high level of programmability allows the SA9401 to satisfy a wide variety of tone
plans. Furthermore by providing three inputs to select between one of eight tone
programs during initialisation, the device effectively facilitates the design of a universally
programmable "PABX Processor Card". Because the tone program inputs are latched
at the start of each PCM frame the SA9401 minimises the possibility of glitches.
The SA9401 can also generate the PCM Frame synchronising reference signal if
required.
4092
PDS039-SA9401-001
REV. C
07-05-96

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