MX803ADW データシートの表示（PDF） - MX-COM Inc

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MX803ADW

Audio Signaling Processor

MX-COM Inc  

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

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: 910 744 5054

Doc. # 20480122.003

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