MX803A Datasheet, PDF (1/26 Pages) List of Unclassifed Manufacturers – Audio Signaling Processor

DATA BULLETIN
MX803A ^{Audio Signaling Processor}
Features
• 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
PRELIMINARY INFORMATION
Applications
• 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.
SIGNAL INPUT BIAS
(RX)
AUDIO IN
DIGITAL
NOISE
FILTER 1
RX FILTER
SWITCH
DIGITAL
NOISE
FILTER 2
QUALITY
METER
GATE TIME
GENERATOR
V_DD
PROGRAMMABLE
(TX PERIOD)
TIMER
FREQUENCY
COUNTER
V_BIAS
V_SS
XTAL/
CLOCK
XTAL
CLOCK
GENERATOR
AUDIO SWITCH IN
AUDIO
SWITCH
TONE 1
GENERATOR
5-/2-TONE
DTMF 1
V_BIAS
_
+
SUMMING
AMPLIFIER
TONE 2
GENERATOR
CUES/DTMF 2
PROGRAMMABLE
NOTONE
TIMER
COMMAND DATA
C-BUS
INTERFACE
REPLY DATA
CHIP SELECT
AND
CONTROL
LOGIC
INTERRUPT
SERIAL CLOCK
LOGIC INPUT
LOW
PASS
FILTER
SUMMING
SWITCH
CUES
CAL/CUES
SWITCH
CAL
LOW
PASS
FILTER
TONE 1 OUT
SUM IN
SWITCHED SUM OUT
SUM OUT
CAL/CUES OUT
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 µC, 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 CDIP (MX803AJ), 24-pin PLCC (MX803ALH), and 24-pin SOIC (MX803ADW)
packages.
© 1996 MX•COM, INC.
Tele: 800 638 5577 910 744 5050 Fax: [phone]
Doc. # 20480122.003