MX COM Inc MX663DW, MX663P Datasheet

DATA BULLETIN

MX663

Call Progress Decoder

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

PRELIMINARY INFORMATION

Features Applications

•

Worldwide Call Progress Tone Decoding:

Single and Dual Tones Fax and Modem Answer/Originate Tones SIT (Special Information Tones) Fast ‘US Busy’ Tone Detector

•

Adjustable Detection Threshold

•

Voice Detector

•

Low Power 3.3V/5.0V Operation

•

Call Progress Monitoring

Automatic Call Placement

•

Machine Dialing

•

Fax Tone Detection for Line Switching

MX663

CALL PROGRESS DECODER

LINE INTERFACE

DTMF

KEYBOARD

AND DISPLAY

DRIVER

AUDIO

PROCESSING

RINGING CURRENT

GENERATOR/

LINE REVERSAL

DETECTOR

DETECTOR AND

µC

CODEC

The MX663 decodes the standard audible tone signals provided by telecom systems worldwide to indicate Dial, Ringing, Busy, Unobtainable and other stages of a call attempt. It provides the key features needed for intelligent, full-function, call progress monitoring by applications involving machine dialing or automatic call placement. The MX663 also incorporates the following features:

•

Single and dual tone decoding for better cross-system Call Progress monitoring.

•

"US Busy" tone detector, saving time needed for "cadence verification" under Busy and Unobtainable conditions. This incorporates a separate 620Hz detector for improved response.

•

A detector to indicate speech and non-call progress signals; this reduces voice falsing of call progress tones and adds Voice-Answer detection as a "connected" prompt.

•

A fax and modem tone decoder.

•

A separate, adjustable threshold, signal-level detector which reduces noise falsing.

The MX663 uses digital signal processing techniques to provide these advantages. It is a low cost, low power product with superior performance. The MX663 may be used with a 3.0 to 5.5 volt supply and is available in the following packages: 16-pin SOIC (MX663DW) or 16-pin PDIP (MX663P).

Call Progress Decoder 2 MX663 Preliminary Information

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

CONTENTS

Section Page

1. Block Diagram................................................................................................................3

2. Signal List.......................................................................................................................4

3. External Components....................................................................................................5

4. General Description.......................................................................................................6

4.1 Overall Function Description ............................................................................................... 6

4.2 Glossary .............................................................................................................................. 6

4.3 Block Diagram Description (Reference Figure 1)................................................................ 6

4.3.1 SIGIN......................................................................................................................................6

4.3.2 Call Progress Detector: Signal Analyzer ................................................................................7

4.3.3 620Hz Detector ......................................................................................................................7

4.3.4 Control and Output Logic ......................................................................................................7

4.3.5 Level Detector and OPAMP ...................................................................................................7

4.3.6 Xtal/Clock Oscillator ...............................................................................................................7

4.3.7 Decode Output Truth Table....................................................................................................8

5. Application .....................................................................................................................9

5.1 General................................................................................................................................ 9

5.2 Signal Category Reference ................................................................................................. 9

5.3 Typical Response.............................................................................................................. 10

6. Performance Specification..........................................................................................11

6.1 Electrical Performance ...................................................................................................... 11

6.1.1 Absolute Maximum Ratings.................................................................................................. 11

6.1.2 Operating Limits...................................................................................................................11

6.1.3 Operating Characteristics.....................................................................................................12

6.2 Timing................................................................................................................................ 13

6.3 Packaging.......................................................................................................................... 16

MX COM, Inc. reserves the right to change specifications at any time and without notice.

Call Progress Decoder 3 MX663 Preliminary Information

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

1. Block Diagram

BIAS

LEVEL

DETECTOR

XTAL/CLOCK

XTAL

CLOCK

OSCILLA TOR

AND

DIVIDERS

OPAMP

SIGIN

AMPOUT

IN-

IN+

ENABLE

IRQ

620Hz

DETECTOR

SIGNAL

ANALYZER

CONTROL

AND

OUTPUT

LOGIC

MX663

SIGNAL

(Components shown for

unbalanced input)

BIAS

Figure 1: Block Diagram

Call Progress Decoder 4 MX663 Preliminary Information

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

2. Signal List

Pin No. Signal Type Description

XTAL

output Inverted output of the on-chip oscillator.

2 XTAL/CLOCK input Input to the on-chip oscillator, for external Xtal circuit or clock. 3

4 5 6

D3 D2 D1 D0

output D3, D2, D1 and D0 is a 4-bit parallel data word output to the µC. The

transmission of data is under the control of the

input. These 3-

state outputs are held at high impedance when

is at "1". See

Figure 8 If

is permanently at "0", D3, D2, D1 and D0 are permanently active.

See Figure 4 and Figure 7.

input The chip select pin activates the Data Bus “D0: 3” when held low. A

C can provide this input to allow the MX663 to reside on a shared

Data Bus. Data transfer sequences are initiated, completed or aborted by the

signal. See Figure 8

IRQ

output This output indicates an interrupt condition to the µC by going to a logic

"0". This is a "wire-ORable" output, enabling the connection of up to 8 peripherals to 1 interrupt port on the µC. This pin has a low impedance pulldown to logic "0" when active and a high-impedance when inactive. An external pullup resistor is required.

is permanently at "0", the interrupt condition is a logic "0" pulse.

See Figure 4 and Figure 7.

9 ENABLE input A low level input selects the powersave mode, all circuits are reset and

disabled. D0 - D3 outputs become high impedance. A high level input enables all circuits.

10 V

Power Negative supply (ground).

11 SIGIN input Signal input. The signal to this pin should be ac coupled. The dc bias

of this pin is set internally.

12 V

BIAS

output Internally generated bias voltage, held at VDD/2 when the device is not

in powersave mode, it should be bypassed to V

by a capacitor mounted close to the device pins. In powersave mode this pin is pulled towards V

. 13 IN+ input Non-inverting input to the on-chip amplifier. 14 IN- input Inverting input to the on-chip amplifier. 15 AMPOUT output Output of the on-chip amplifier, this is internally connected to the input

of the Level Detector.

16 V

Power The positive supply rail. Levels and voltages are dependent upon this

supply. This pin should be bypassed to V

by a capacitor.

Table 1: Signal List

Call Progress Decoder 5 MX663 Preliminary Information

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.

3. External Components

16 15

14 13

12 11 10

1 2 3 4 5 6 7 8

AMPOUT IN-

IN+

BIAS

SIGIN

ENABLE

MX663

XTAL

IRQ

Figure 2: Recommended External Components

R1 Note 3 100k

: ±10% C4 Note 3 0.1µF ±20% R2 Note 3 510k: ±10% C5 Note 3 100pF ±20% R3 20k: ±10% C6 1.0µF ±20% C1 33pF ±20% C7 1µF ±20% C2 33pF ±20% C3 0.1µF ±20% X1 Note 1, 2 3.579545MHz ±100ppm

Table 2: Recommended External Components

Notes

1. A standard Color Burst Crystal Frequency is recommended.

2. For best results, a crystal oscillator design should drive the clock inverter input with signal levels of at least 40% of V

, peak to peak. Tuning fork crystals generally cannot meet this requirement. To

obtain crystal oscillator design assistance, consult your crystal manufacturer.

3. Reference section 4.3.5.

+ 11 hidden pages

MX COM Inc MX663DW, MX663P Datasheet

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