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DATA BULLETIN
Document #20480148.001 May 1996
Preliminary Information * International Special Information Tone Identification Worldwide Tone Compatibility * - 40C to 85C 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
* * * * *
CLOCK / XTAL
VDD
AVAILABLE PACKAGES
CLOCK
XTAL VSS
ENABLE
DETECT1
MX643P 8-pin PDIP
SIGIN
SLICER
SIGNAL ANALYZER
CONTROL LOGIC
DETECT2
DETECT3
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).
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Call Progress Tone Detector
2
MX643 - Preliminary Information
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.
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
3
MX643 - Preliminary Information
1. Block Diagram
VDD VDD
CLOCK / XTAL
CLOCK
XTAL VSS
C2
ENABLE
DETECT1
SIGIN C1
SLICER
SIGNAL ANALYZER
CONTROL LOGIC
DETECT2
DETECT3
Note: XTAL used for 16-pin SOIC (MX643DW) only.
Figure 1: Block Diagram
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
4
MX643 - Preliminary Information
2. Signal List
P-Pin No. 1 DW-Pin No. 2 Signal CLOCK / XTAL Type input Description 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. Output of the on-chip oscillator. Not available on 8-pin DIP.. 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. 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. When a call progress signal is detected, this output goes to a logic 1. Signal input. Signals to this pin should be ac coupled. The dc bias of this pin is set internally. Negative supply. (ground). 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. Positive supply. This pin should be decoupled to VSS by a capacitor. Internal connection. Do not make a connection to these pins.
2
3 4
XTAL DETECT3
output output
3
5
ENABLE
input
4 5 6 7
7 10 12 13
DETECT1 SIGIN VSS DETECT2
output input power output
8
15 1, 6, 8, 9, 11, 14, 16
VDD N/C
power
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
5
MX643 - Preliminary Information
3. External Components
N/C
1 2 3 4
16 N/C
VDD
CLOCK
1
8
VDD
VDD
C3
XTAL/ CLOCK X1 XTAL
DETECT3 ENABLE
15
VDD
C2
C2 DETECT3
R1
C4
14 N/C 13 DETECT2
2
DETECT2
7
ENABLE
MX643P
3 6
MX643P MX643DW
5 6 7 8
1M 560pF at 3.3VDD 1.0nF at 5.0VDD 1.0F 33pF 33pF 3.579545MHz
VSS
12
VSS
N/C
11 N/C 10 9
SIGIN C1
N/C
DETECT1
4
5
SIGIN C1
DETECT1
N/C
C1 C2
1.0nF 1.0F
20 20
R1 C1 C2 C3 C4 X1
10 20 20 20 20 refer to Sec. 6.1
For details of CLOCK frequency 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.
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
6
MX643 - Preliminary Information
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 VDD/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.
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
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MX643 - Preliminary Information
5.1 Decode Output Truth Table
DETECT3 0 1 0 1 0 1 0 1 DETECT2 0 0 0 0 1 1 1 1 DETECT1 0 0 1 1 1 1 0 0 CONDITIONS No Signal Special Information Tone: Will detect 950, 1400 and 1800Hz tones Call Progress Low Band: Will detect 350+440, 400+450 and 440+480Hz tones, for example Call Progress Low Band: Will detect single 400, 425, 440, and 450Hz tones, for example Call Progress High Band: Will detect 480+620Hz tones, for example Call Progress High Band: Will detect single 600 and 620Hz tones, for example Non Call Progress signal, e.g. Voice Activity 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 Supply (VDD - VSS) Voltage on any pin to VSS Current VDD VSS Any other pin P/DW Package Total Allowable Power Dissipation at TAMB = 25C Derating above 25C Storage Temperature Operating Temperature -55 -40 800 13 125 85 mW mW/C above 25C C C -30 -30 -20 30 30 20 mA mA mA Min. -0.3 -0.3 Max. 7.0 VDD + 0.3 Units V V
Operating Limits Correct operation of the device outside these limits is not implied. Notes Supply (VDD - VSS) Xtal Frequency Min. 3.0 3.57 Max. 5.5 3.59 Units V MHz
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
8
MX643 - Preliminary Information
Operating Characteristics For the following conditions unless otherwise specified: Xtal Frequency = 3.579545MHz, S/N = 16 dB, Noise Bandwidth = 5 kHz, VDD = 3.3V to 5.0V, TAMB = - 40C to 85C. 0dB = 775mVRMS. Notes DC Parameters Supply Current IDD (ENABLE = 1) (VDD = 5.0V) IDD (ENABLE = 1) (VDD = 3.3V) Enable Input Input Logic 1 Level Input Logic 0 Level Input Leakage Current (VIN = 0 to VDD) Input Capacitance Detect Output Output Logic 1 Level (lOH = 120A) Output Logic 0 Level (lOL = 360A) AC Parameters SIGIN pin Input Impedance (at 100Hz) Input Signal Level Input Signal Dynamic Range Signal to Noise Ratio Clock Input 'High' Pulse Width 'Low' Pulse Width Input Impedance (at 100Hz) Gain (input = 1mVRMS at 100Hz) Operating Characteristics Notes: 1. 2. 3. 4. 5. 6. Not including any current drawn from the device pins by external circuitry. ENABLE pin. DETECT1, DETECT2 and DETECT3 pins. Small signal impedance. The input level is not critical as the detector uses a stochastic algorithm. Timing for an external input to the CLOCK pin. 6 6 40 40 10 20 ns ns M dB 4 5 5 -40 40 16 350 k dB dB dB 3 3 90% 10% VDD VDD 2 2 2 2 -5.0 10.0 80% 20% 5.0 VDD VDD A pF 1 1 0.5 0.3 1.0 0.7 mA mA Min. Typ. Max. Units
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
9
MX643 - Preliminary Information
Timing Characteristics For the following conditions unless otherwise specified: Xtal Frequency = 3.579545MHz, VDD = 3.3V to 5.0V, TAMB = - 40C to 85C, S/N = 20dB. Timing (ref. Figures 3, 4, 5 and 6) tI tL tGI tGD tRP tDRP tGDR tNG tNRP tDNRP tCH tV Burst Length Ignored Burst Length Detected Call Progress Tone Gap Length Ignored Call Progress Tone Gap Length Detected Call Progress Tone Response Time Call Progress Tone De-response Time Gap Detected Recorded Non Call Progress Signal Gap Length Ignored Non Call Progress Signal Response Time Non Call Progress signal De-response Time State Change DETECT1, DETECT2, and DETECT3 Response Time 5 0 145 Notes 1 1 1, 2 1, 2 1 1 1, 3 4 145 80 6 80 40 145 145 145 20 Min. Typ. Max. 70 Units ms ms ms ms ms ms ms ms ms ms ms 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
tI
No Signal
tL Call Progress Low Band tRP Call Progress High Band
tGD Call Progress High Band tRP tDRP tRP tDRP
tGI Call Progress High Band
SIGIN
ENABLE DETECT1
tGDR DETECT2 DETECT3
Note: DETECT3 is logic high only when the Call Progress Signal, or the Non Call Progress Signal is a single frequency tone.
Figure 3: Timing Diagram: Call Progress Tone(s)
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
10
MX643 - Preliminary Information
tI
No Signal
tL Non Call Progress Signal
tNG Non Call Progress Signal
SIGIN
ENABLE tNRP tNDRP DETECT1 DETECT2 DETECT3
Note: DETECT3 is logic high only when the Call Progress Signal, or the Non Call Progress Signal is a single frequency tone. 0 Level
Figure 4: Timing Diagram: Non Call Progress Signal
SIGIN
No Signal
Call Progress Low Band
Non Call Progress Signal
Call Progress Low Band
ENABLE tRP DETECT1 DETECT2 tCH DETECT3
Note: DETECT3 logic high only when the Call Progress signal, or the Non Call Progress signal is a single frequency tone.
tNRP
tRP
tDRP
Figure 5: Timing Diagram: Call Progress Tone(s) to Non Call Progress Signal
tI
No Signal
tL Special Information Tone Special Information Tone
tGD Special Information Tone tRP
tGI Special Information Tone
SIGIN
ENABLE DETECT1 DETECT2 DETECT3
0 Level 0 Level
tRP
tDRP
tRP
tDRP tGDR
Figure 6: Timing Diagram: Special Information Tones
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
Call Progress Tone Detector
11
MX643 - Preliminary Information
tV DETECT 1 indeterminate signal DETECT 2 valid signal DETECT 3
XTAL/CLOCK tS = the time at which XTAL/CLOCK becomes stable
Figure 7: Timing Diagram: DETECT1, DETECT2, and DETECT3 Response time when ENABLE is high
5V
DETECT 3
0V 5V
SINGLE TONE
SIT
SIT
SIT
896Hz
1041Hz
1343Hz
1489Hz
1716Hz
DETECT 2
0V 5V
VOICE
VOICE
DETECT 1
0V
200Hz
340Hz
596Hz
701Hz
894Hz
NOT DRAWN TO SCALE
Figure 8: MX643 Frequency Sweep Results
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
1858Hz
Call Progress Tone Detector
12
MX643 - Preliminary Information
6.2 Packaging
Package Tolerances
A
DIM.
B E1 E
MIN.
TYP.
MAX.
Y
PIN1
J1
M
T
K H L P J F
K1
C
A B C E E1 F H J J1 K K1 L M P T Y
0.400 (10.16) 0.346 (8.790) 0.260 (6.60) 0.240 (6.10) 0.145 (3.68) 0.200 (5.06) 0.390 (9.87). 0.300 (7.62) 0.290 (7.37) 0.325 (8.22) 0.30 (7.62) 0.015 (0.38) 0.040 (1.01) 0.015 (0.38) 0.023 (0.58) 0.045 (1.14) 0.065 (1.65) 0.060 (1.52) 0.060 (1.52) 0.121 (3.07) 0.150 (3.81) 0.033 (0.84) 0.020 (0.51) 0.100 (2.54) 0.008 (0.20) 0.015 (0.38) 7
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 9: 8-pin PDIP Mechanical Outline: Order as part no. MX643P
Package Tolerances
A Z B E W L PIN 1 X Y C H J P K T
DIM. A B C E H J K L P T W X Y Z MIN. TYP. MAX.
0.395 (10.03) 0.413 (10.49) 0.286 (7.26) 0.299 (7.59) 0.093 (2.36) 0.105 (2.67) 0.390 (9.90) 0.419 (10.64) 0.003 (0.08) 0.020 (0.51) 0.013 (0.33) 0.020 (0.51) 0.041 (1.04) 0.050 (1.27) 0.016 (0.41) 0.050 (1.27) 0.009 (0.23) 0.0125 (0.32) 45 0 10 5 7 5
ALTERNATIVE PIN LOCATION MARKING
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 10: 16-pin SOIC Mechanical Outline: Order as part no. MX643DW
(c) 1996 MX*COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001

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