DATA BULLETIN
MX829
Features
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Rx Audio Processing
Tx Audio Processing
1200/2400 Baud Modem
DTMF Encoder
Low Voltage Operation
“C-BUS” Compatible
Host
µC
Interface
Baseband Signal Processor
PRELIMINARY INFORMATION
Applications
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ETS/MPT/PAA Standards Compatible
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LMR/PAMR/PMR Trunked Systems
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Multi-standard Modem Formats
RADIO
MODULATOR
RF
DISCRIMINATOR
ANALOG Rx
Tx MOD 1
Tx MOD 2
MX829
AUDIO PROCESSOR
MSK MODEM
DTMF ENCODER
SERIAL BUS:
DATA & CONTROL
LEVEL & VOLUME
CONTROLS
HOST µC
The MX829 is a low voltage CMOS integrated circuit, designed to provide baseband audio and system signal-processing
functions required for LMR/PAMR/PMR trunked radio applications. The MX829 operates in half-duplex mode under the
serial-bus control of a host µC.
The MX829 incorporates a dual-rate 1200/2400bps MSK modem, with a software-flexible choice of synchronization
codewords, data run-length and CRC checking to suit a wide range of applications. These features allow very flexible
handling of user defined data on traffic channels in addition to the network signaling sent on control channels. A 16
character DTMF encoder is available in the transmit mode. Software programmable output level-adjustment facilitates
two-point modulation circuits.
The audio processing stages include transmit and receive filtering (based on standards specified for 12.5kHz and 25kHz
LMR/PAMR/PMR channel operation), transmit deviation limiting, and a programmable Rx volume control. Power saving is
automatic when audio functions are disabled.
The MX829 is designed for use in radios compatible with MPT1327, PAA1382 and ETS 300 086 Trunking Standards.
The features and flexibility of the MX829 ensure that it is equally suitable for use with modified or proprietary standards.
The MX829 is available in the following packages: 24-pin SSOP (MX829DS), 24-pin SOIC (MX829DW), and
24-pin PDIP (MX829P).
© 1998 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 336 744-5050 Fax: 336 744-5054
Doc. # 20480160.004
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
All trademarks and service marks are held by their respective companies.
CMLMICRO [ CML MICROCIRCUITS ]
