Document
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
VDD
PROGRAMMABLE (TX PERIOD) TIMER
FREQUENCY COUNTER
VBIAS VSS
XTAL/ CLOCK
XTAL
CLOCK GENERATOR
AUDIO SWITCH IN
AUDIO SWITCH
TONE 1 GENERATOR
5-/2-TONE DTMF 1
VBIAS
_
+ SUMMING AMPLIFIER
TONE 2 GENERATOR
CUES/DTMF 2
PROGRAMMABLE NOTONE TIMER
COMMAND DATA
C-BUS INTERFACE
REPLY DATA CHIP SELECT
AND CONTROL
LOG.