Datasheet MX643DW, MX643P Datasheet (MX COM)

DATA BULLETIN

Document #20480148.001 May 1996

Preliminary Information

• • International Special Information Tone Identification

• • Worldwide Tone Compatibility • • - 40°°C to 85°°C Operating Temp

• • Single and Dual Tone Detected • • Low Supply Current (0.3mA/0.5mA)

• • U.S. Busy-Detect Output • • Low Supply Voltage (3.3V/5.0V)

• • Voice-Detect Output • • Standard 3.58MHz Clock Input

• • Wide Dynamic Range > 40dBm • • Standard 8-pin DIP Package

DETECT2

DETECT3

DETECT1

SLICER

SIGIN

ENABLE

XTAL

SIGNAL

ANALYZER

CONTROL

LOGIC

CLOCK

V

SS

V

DD

CLOCK /

XTAL

AVAILABLE PACKAGES

MX643P

8-pin PDIP

MX643DW

16-pin SOIC

The MX643 is a low power, low cost device that uses signal processing techniques to detect audible tone signals such as; Dial, Ring, Busy, Unobtainable, and other conditions found when placing a call throughout the world’s telecom systems. The detection of these Call Progress stages is essential to the proper operation and application of automatic calling products.

The MX643 offers identification of International Special Information Tones (SIT), reducing the time needed for cadence verification under Obtainable conditions. In addition to the SIT feature, single and dual tone decoding are added for better cross-system Call Progress monitoring. The MX643 offers these features in addition to the same performance levels and features of the MX633 Call Progress Tone Detector such as; detection and identification of U.S. Busy tones, thereby reducing the need to measure the tone cadence to identify U.S. Busy. The decoding and indicating of speech, or other Non-Call Progress signals, thus reducing voice-falsing of Call Progress tones and adding Voice-Answer as a connect prompt.

Available in the industry standard 8-pin DIP, the MX643 is also available in a 16-pin SOIC making it pin compatible with the MX633DW (16-pin SOIC).

Call Progress Tone Detector MX643 - Preliminary Information

2

CONTENTS

Section Page

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

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

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

4. General Description......................................................................................................5

4.1 Glossary ............................................................................................................................ 5

4.2 Overall Function Description ............................................................................................. 6

5. Block Diagram Description..........................................................................................6

5.1 Decode Output Truth Table............................................................................................... 7

6. Performance Specification ..........................................................................................7

6.1 Electrical Performance...................................................................................................... 7

6.2 Packaging......................................................................................................................... 11

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

Call Progress Tone Detector MX643 - Preliminary Information

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1. Block Diagram

DETECT2

DETECT3

DETECT1

SLICER

SIGIN

ENABLE

XTAL

SIGNAL

ANALYZER

CONTROL

LOGIC

CLOCK

V

SS

V

DD

V

DD

C1

C2

CLOCK /

XTAL

Note: used for 16-pin SOIC (MX643DW) only.XTAL

Figure 1: Block Diagram

Call Progress Tone Detector MX643 - Preliminary Information

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2. Signal List

P-Pin

No.

DW-Pin

No.

Signal Type Description

1 2 CLOCK / XTAL input For the MX643P this is the external clock input to the clock

divider circuit. For the MX643DW this can be either an external clock input or an external crystal input.

-3

XTAL

output Output of the on-chip oscillator. Not available on 8-pin DIP..

2 4 DETECT3 output When a single tone is within the range of the Call Progress

Band, Non Call Progress Band, or a Special Information Tone, is detected, this output goes to a logic 1.

3 5 ENABLE input A logic 1 applied to this input enables the decoder and

detection outputs. A logic 0 applied to this input disables the decoder and forces DETECT1, DETECT2 and DETECT3 to a logic 0.

4 7 DETECT1 output When a call progress signal is detected, this output goes to a

logic 1.

5 10 SIGIN input Signal input. Signals to this pin should be ac coupled. The dc

bias of this pin is set internally. 612 VSSpower Negative supply. (ground). 7 13 DETECT2 output This output is used in conjunction with DETECT1. When

DETECT1 is at a logic 1, this output goes to a logic 1 if a Call

Progress High Band signal is detected. When DETECT1 is

at a logic 0, this output goes to a logic 1 if a Non Call

Progress signal is detected. 815 VDDpower Positive supply. This pin should be decoupled to VSS by a

capacitor.

1, 6, 8,

9, 11,

14, 16

N/C Internal connection. Do not make a connection to these pins.

Call Progress Tone Detector MX643 - Preliminary Information

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3. External Components

CLOCK

C2

8

7

2

3

4

5

6

DETECT1

MX643P

ENABLE

V

SS

SIGIN

DETECT2

DETECT3

V

DD

C1

1

V

DD

XTAL/

CLOCK

C3

C2

R1

X1

C4

DETECT3

MX643DW

ENABLE

SIGIN

DETECT2

V

DD

V

SS

C1

XTAL

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

DETECT1

N/C

V

DD

MX643P

C1 1.0nF

±20

R1

1MΩ±10

C2

1.0µF ±20

C1 560pF at 3.3V

DD

1.0nF at 5.0V

DD

±20

For details of CLOCK frequency refer to Sec.6.1 C2

1.0µF ±20

C3 33pF

±20

C4 33pF

±20

X1 3.579545MHz refer to Sec. 6.1

Figure 2: Recommended External Components for Typical Applications

4. General Description

4.1 Glossary

The following glossary and Decode Truth table (found in section 5.1), describe the MX643 decoding features and functions.

Call Progress Tones:

The single and dual frequency tones in the range of 350Hz to 620Hz specified widely for

Call Progress signaling.

Call Progress Band:

The nominal range is 340Hz to 650Hz within which the MX643 will detect Call Progress

tones. The detection algorithm requires that the tones have characteristics typical of Call Progress Tones.

Call Progress Low Band:

The nominal range is 340Hz to 490Hz. The MX643 will detect single or dual tones

falling entirely within this range, as Call Progress Low Band tones.

Call Progress High Band:

The nominal range is 600Hz to 650Hz. Single tones in this range, or dual tones having a material frequency component within this range (e.g. 480 + 620Hz), are detected as Call Progress High Band tones.

Special Information Tone:

The nominal range is 950Hz or 1400Hz or 1800Hz, with a tolerance of ±50Hz.

Non Call Progress Signal:

A signal falling within the nominal range (a) 200Hz to 800Hz, but NOT within the Call Progress Band, or (b) within the nominal range 200Hz to 800Hz, but NOT meeting the DETECTION REQUIREMENTS when the signal falls in the Call Progress Band.

Subject to the duration and other characteristics of such signals, the MX643 will usually interpret these as a Non Call Progress Signal (e.g. speech or other signal activity).

Minimum Input Signal:

The minimum signal level for the specified tone decoding performance. The lower level

at which absence of an input signal will be registered is not specified.

No Signal:

A signal falling outside the nominal range of 120Hz to 900Hz or Special Information Tone or the

absence of an input signal. Either will be detected as a No Signal condition.

Call Progress Tone Detector MX643 - Preliminary Information

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Nominal:

Subject to dynamic tolerances within the signal analysis process. Absolute values are not material or

adverse to performance.

4.2 Overall Function Description

The MX643 Call Progress Tone Detector uses different tone detection methods from those commonly found with other Call Progress Tone Detectors.

Many traditional devices use a bandpass filter followed by an energy detector. The filter is usually designed to pass input signals with a frequency between about 300Hz and 700Hz. Each signal amplitude in this range is then checked against a level threshold. Any signal of acceptable level in this frequency band is classed as a Call Progress tone, including speech and noise. False outputs caused by speech are commonly indicated by such products and background noise may lead to a stuck detect output.

In contrast, the MX643 uses a stochastic signal processing technique. This technique is based on analysis of both the frequency and time domains, with signal amplitude forming a minor part in the decision process. This analysis includes, checks on whether the signal has a profile which matches international standards for Call Progress Tones, Special Information Tones, or a profile more likely to match that of speech, noise or other Non-Call Progress signals. Checks are also performed to see if the signal is a single tone, and whether the tones which include frequencies corresponding with the ‘U.S. Busy’ signals have been detected.

5. Block Diagram Description

(Reference Figure 1)

Slicer

The input signal to the slicer is amplified by a self-biased inverting amplifier. The dc bias of this input is internally set at V

DD

/2.

Signal Analyzer

The frequency range, quality, and consistency of the input signal is analyzed by this function block. To be classified as a Call Progress signal the input signal frequencies should lie between 340Hz and 650Hz. To be classified as a Special Information Tone, the input signal frequency should lie between 900Hz and 1000Hz or 1350Hz and 1450Hz or 1750Hz and 1850Hz. The signal to noise ratio must be 16dB or greater. The signal must be consistent over a period of about 145 ms. These decode criteria are continuously monitored and the assessment is updated every 7 ms, reference Figure 3.

The Signal Analyzer samples the call progress signal at 9.3kHz. Care should be taken to avoid high frequency signals (≥8.4kHz) aliasing into the call progress band.

Control Logic

This block categorizes the nature of the signal into various decoded output states and controls the three output pins. See the Decode Output Truth Table in section 5.1

Clock

An external clock source is to be connected to the CLOCK input pin when using the 8-pin device. If using the onchip oscillator (16-pin device only) you will need to use the external components shown in Figure 2. If using an

external clock source then

XTAL

should be left unconnected.

Call Progress Tone Detector MX643 - Preliminary Information

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5.1 Decode Output Truth Table

DETECT3 DETECT2 DETECT1 CONDITIONS

0 0 0 No Signal 1 0 0 Special Information Tone: Will detect 950, 1400 and 1800Hz tones 0 0 1 Call Progress Low Band: Will detect 350+440, 400+450 and

440+480Hz tones, for example

1 0 1 Call Progress Low Band: Will detect single 400, 425, 440, and

450Hz tones, for example

0 1 1 Call Progress High Band:

Will detect 480+620Hz tones, for example

1 1 1 Call Progress High Band: Will detect single 600 and 620Hz tones, for

example 0 1 0 Non Call Progress signal, e.g. Voice Activity 1 1 0 Will detect a single tone lying outside the Call Progress Band and

within the Non Call Progress signal range

Decode Output Truth Table Notes:

DETECT1 responds to the complete range of call progress signals from 340Hz to 650Hz DETECT2 responds to higher frequency call progress and voice or similar activity DETECT3 responds to and indicates the presence of a single tone

6. Performance Specification

6.1 Electrical Performance

Absolute Maximum Ratings

Exceeding these maximum ratings can result in damage to the device.

General Min. Max. Units

Supply (VDD - VSS) -0.3 7.0 V Voltage on any pin to V

SS

-0.3 V

DD

+ 0.3 V

Current

V

DD

-30 30 mA

V

SS

-30 30 mA

Any other pin -20 20 mA

P/DW Package

Total Allowable Power Dissipation at T

AMB

= 25°C 800 mW

Derating above 25°C 13 mW/°C above 25°C Storage Temperature -55 125 °C Operating Temperature -40 85 °C

Operating Limits

Correct operation of the device outside these limits is not implied.

Notes Min. Max. Units

Supply (VDD - VSS) 3.0 5.5 V Xtal Frequency 3.57 3.59 MHz

Call Progress Tone Detector MX643 - Preliminary Information

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Operating Characteristics

For the following conditions unless otherwise specified:

Xtal Frequency = 3.579545MHz, S/N = 16 dB, Noise Bandwidth = 5 kHz, V

DD

= 3.3V to 5.0V, T

AMB

= - 40°C to 85°C. 0dB = 775mV

RMS

.

Notes Min. Typ. Max. Units

DC Parameters

Supply Current IDD (ENABLE = 1) (VDD = 5.0V) 1 0.5 1.0 mA IDD (ENABLE = 1) (VDD = 3.3V) 1 0.3 0.7 mA

Enable Input

Input Logic 1 Level 2 80% V

DD

Input Logic 0 Level 2 20% V

DD

Input Leakage Current (VIN = 0 to VDD) 2 -5.0 5.0 µA Input Capacitance 2 10.0 pF

Detect Output

Output Logic 1 Level (lOH = 120µA) 3 90% V

DD

Output Logic 0 Level (lOL = 360µA) 3 10% V

DD

AC Parameters

SIGIN pin

Input Impedance (at 100Hz) 4 350

k

Ω

Input Signal Level 5 -40 dB Input Signal Dynamic Range 5 40 dB Signal to Noise Ratio 16 dB

Clock Input

'High' Pulse Width 6 40 ns 'Low' Pulse Width 6 40 ns Input Impedance (at 100Hz) 10

M

Ω

Gain (input = 1mV

RMS

at 100Hz) 20 dB

Operating Characteristics Notes:

1. Not including any current drawn from the device pins by external circuitry.

2. ENABLE pin.

3. DETECT1, DETECT2 and DETECT3 pins.

4. Small signal impedance.

5. The input level is not critical as the detector uses a stochastic algorithm.

6. Timing for an external input to the CLOCK pin.

Call Progress Tone Detector MX643 - Preliminary Information

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Timing Characteristics

For the following conditions unless otherwise specified: Xtal Frequency = 3.579545MHz, V

DD

= 3.3V to 5.0V, T

AMB

= - 40°C to 85°C, S/N = 20dB.

Timing

(ref. Figures 3, 4, 5 and 6)

Notes Min. Typ. Max. Units

t

I

Burst Length Ignored 1 70 ms

t

L

Burst Length Detected 1 145 ms

t

GI

Call Progress Tone Gap Length Ignored 1, 2 20 ms

t

GD

Call Progress Tone Gap Length Detected 1, 2 40 ms

t

RP

Call Progress Tone Response Time 1 145 ms

t

DRP

Call Progress Tone De-response Time 1 145 ms

t

GDR

Gap Detected Recorded 1, 3 6 ms

t

NG

Non Call Progress Signal Gap Length Ignored 4 80 ms

t

NRP

Non Call Progress Signal Response Time 145 ms

t

DNRP

Non Call Progress signal De-response Time 80 ms

t

CH

State Change 0 ms

t

V

DETECT1, DETECT2, and DETECT3 Response

Time

5 145 ms

Timing Notes:

1. Timings also apply to Special Information Tone.

2. Only applies to bursts of the same frequency.

3. To acknowledge a short tone gap ≥ 40 ms, No Signal is indicated for a minimum of 6ms.

4. If the gap > 90 ms, a No Signal state will be decoded.

5. Time between a stable XTAL/CLK and a valid DETECT1, DETECT2, and DETECT3 state when ENABLE is logic high..

Timing Diagrams

SIGIN

DETECT1

ENABLE

No Signal

Call Progre s s

Low Band

Call Progre s s

High Band

Call Progre s s

High Band

Call Progre s s

High Band

DETECT2

Note: DETECT3 is logic high only when the Call Progress Signal, or the Non Call Progress Signal is a single frequency tone.

t

I

t

L

t

GD

t

DRP

t

GI

t

GDR

t

RP

t

RP

t

RP

t

DRP

DETECT3

Figure 3: Timing Diagram: Call Progress Tone(s)

Call Progress Tone Detector MX643 - Preliminary Information

10

SIGIN

DETECT1

ENABLE

No Signal

0 Level

Non Call

Progress Signal

Non Call

Progress Signal

DETECT2

DETECT3

t

NRP

t

I

t

NG

t

L

t

NDRP

Note: DETECT3 is logic high only when the Call Progress Signal, or the Non Call Progress Signal is a single frequency tone.

Figure 4: Timing Diagram: Non Call Progress Signal

SIGIN

DETECT1

ENABLE

No Signal

Call Progre s s

Low Band

Non Call

Progress Signal

Call Progre s s

Low Band

DETECT2

DETECT3

t

DRP

t

CH

t

NRP

t

RP

t

RP

Note: DETECT3 logic high only when the Call Progress signal, or the Non Call Progress signal is a single frequency tone.

Figure 5: Timing Diagram: Call Progress Tone(s) to Non Call Progress Signal

SIGIN

DETECT1 DETECT2

ENABLE

No Signal

Special

Information

Tone

Special

Information

Tone

Special

Information

Tone

Special

Information

Tone

DETECT3

0 Level

t

I

t

L

t

GD

t

RP

t

DRP

t

RP

t

GI

t

GDR

t

RP

t

DRP

Figure 6: Timing Diagram: Special Information Tones

Call Progress Tone Detector MX643 - Preliminary Information

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DETECT 1 DETECT 2 DETECT 3

XTAL/CLOCK

t

V

indeterminate signal valid signal

t = the time at which XTAL/CLOCK becomes stable

S

Figure 7: Timing Diagram: DETECT1, DETECT2, and DETECT3 Response time when ENABLE is high

DETECT 2

DETECT 1

DETECT 3

5V

0V

SITSIT SITSINGLETONE

VOICEVOICE

340Hz

596Hz

701Hz

1041Hz

200Hz

894Hz

1343Hz

1489Hz

1716Hz

1858Hz

896Hz

NOT DRAWNTO SCALE

5V

0V 5V

0V

Figure 8: MX643 Frequency Sweep Results

Call Progress Tone Detector MX643 - Preliminary Information

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6.2 Packaging

A

B

PIN1

MJ1

Y

E1

T

E

K

K1

P

H

C

J

F

L

A B C E

E1

F

H

TYP. MAX.MIN.

DIM.

J

J1

P Y

T

K1

K

L

M

0.200 (5.06)

0.260 (6.60)

0.390 (9.87).

7°

0.150 (3.81)

0.400 (10.16)

0.145 (3.68)

0.100 (2.54)

0.121 (3.07)

0.020 (0.51)

0.300 (7.62)

0.290 (7.37) 0.325 (8.22)

0.30 (7.62)

0.040 (1.01)

0.008 (0.20) 0.015 (0.38)

0.015 (0.38) 0.023 (0.58)

0.045 (1.14) 0.065 (1.65)

0.060 (1.52)

0.346 (8.790)

0.240 (6.10)

NOTE: All dimensions in inches (mm.)

Angles are in degrees

Pac kageTolerances

0.015 (0.38)

0.033 (0.84)

Figure 9: 8-pin PDIP Mechanical Outline:

Order as part no. MX643P

PIN 1

A

B

ALTERNATIVE

LOCA TION MARKING

X

P

J

Y

C

K

H

E

L

T

W

Z

NOTE: All dimensions in inches (mm.)

Angles are in degrees

Packa geTolerances

A B C E H

TYP.

MAX.MIN.

DIM.

J

P

X

W

T

Y

K

L

0.105 (2.67)0.093 (2.36)

0.419 (10.64)

45°

7°

0° 10°

0.050 (1.27)

0.041 (1.04)

0.413 (10.49)

0.299 (7.59)

0.050 (1.27)

0.016 (0.41)

0.390 (9.90)

0.020 (0.51)0.003 (0.08)

0.009 (0.23) 0.0125 (0.32)

0.013 (0.33) 0.020 (0.51)

0.395 (10.03)

0.286 (7.26)

Z

5°

Figure 10: 16-pin SOIC Mechanical Outline:

Order as part no. MX643DW

Datasheet MX643DW, MX643P Datasheet (MX COM)

Specifications and Main Features

Frequently Asked Questions

User Manual