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MX803A Datasheet

  • MX803A

  • DATA BULLETIN Audio Signaling Processor

  • 27頁

  • CMLMICRO

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COMMUNICATION SEMICONDUCTORS
MX803A
Audio Signaling Processor
PRELIMINARY INFORMATION
DATA BULLETIN
Features
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Full Duplex Audio Signaling Processor
Single Tone
Selective Call systems
Tone Decoder with
programmable NOTONE timer.
Two Individual tone encoders and a
programmable TX Period Timer.
Low Power CMOS Device
On-Chip programmable amplifier.
C-BUS Compatible
SIGNAL INPUT BIAS
DIGITAL
NOISE
FILTER 1
RX FILTER
SWITCH
Applications
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Signaling Systems supported
SelCall (CCIR, EEA, ZVEI I / II /III)
2-Tone SelCall
DTMF Encode
Inband Tone Signaling capability for LMR
and other Radio Systems.
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(RX)
AUDIO IN
DIGITAL
NOISE
FILTER 2
COMMAND DATA
QUALITY
METER
PROGRAMMABLE
NOTONE
TIMER
REPLY DATA
GATE TIME
GENERATOR
C-BUS
INTERFACE
AND
CONTROL
LOGIC
CHIP SELECT
INTERRUPT
SERIAL CLOCK
LOGIC INPUT
FREQUENCY
COUNTER
V
DD
PROGRAMMABLE
(TX PERIOD)
TIMER
V
BIAS
TONE 1
GENERATOR
5-/2-TONE
DTMF 1
LOW
PASS
FILTER
TONE 1 OUT
SUM IN
SWITCHED SUM OUT
V
SS
_
V
BIAS
XTAL/
CLOCK
XTAL
AUDIO SWITCH IN
AUDIO
SWITCH
SUMMING
SWITCH
SUM OUT
CAL/CUES OUT
+
SUMMING
AMPLIFIER
CUES
CAL/CUES
SWITCH
CLOCK
GENERATOR
CAL
TONE 2
GENERATOR
CUES/DTMF 2
LOW
PASS
FILTER
TONE 2 OUT
SWITCH OUT
The MX803A is an audio signaling processor that provides inband tone signaling capabilities for LMR and
other Radio systems. A low-power CMOS device, the MX803A is a member of the DBS800 (Digitally
integrated Baseband Sub-system) IC family (See section 4.2). Supported Signaling systems include SelCall
(CCIR, EEA, ZVEI I, II, and III) 2-Tone SelCall and DTMF encode. The use of a non-predictive decoder and a
versatile encoder, allows the MX803A to operate in any standard or non-standard tone system.
The MX803A is a full-duplex device for use with Single Tone or Selective Call systems. The MX803A consists
of a tone decoder with a programmable NOTONE timer, two individual tone encoders and a programmable TX
period timer, and an on-chip summing amplifier. Under the control of a
碌C,
the MX803A will simultaneously
encode and transmit 1 or 2 audio tones in the 208-3000Hz range, as well as detect, decode, and indicate the
frequency of any non-predicted input tone in the frequency range of 313 to 6000Hz.
The MX803A is available in 24-pin PDIP (MX803AP), 24-pin PLCC (MX803ALH), and 24-pin SOIC
(MX803ADW) packages.
漏2001 MX鈥OM, INC.
www.mxcom.com
Tele: 800 638 5577 336 744 5050
Fax: 336 744 5054
Doc. # 20480122.005
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.

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