CML MX643 International special information tone identification Datasheet

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
CLOCK /
XTAL
VDD
AVAILABLE
PACKAGES
CLOCK
VSS
XTAL
ENABLE
DETECT1
SIGIN
SLICER
SIGNAL
ANALYZER
CONTROL
LOGIC
MX643P
8-pin PDIP
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).
© 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.
© 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
CLOCK /
XTAL
VDD
CLOCK
VSS
XTAL
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
© 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
2. Signal List
P-Pin
No.
1
DW-Pin
No.
2
Signal
Type
Description
CLOCK / XTAL
input
2
3
4
XTAL
DETECT3
output
output
3
5
ENABLE
input
4
7
DETECT1
output
5
10
SIGIN
input
6
7
12
13
VSS
DETECT2
power
output
8
15
VDD
power
1, 6, 8,
9, 11,
14, 16
N/C
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.
© 1996 MX•COM, INC.
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Doc. #20480148.001
Call Progress Tone Detector
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MX643 - Preliminary Information
3. External Components
N/C
CLOCK
1
8
VDD
VDD
C2
DETECT3
DETECT2
2
7
MX643P
ENABLE
3
6
DETECT1
5
4
VSS
SIGIN
16 N/C
VDD
2
15
X1
XTAL
3
14 N/C
DETECT3
4
13 DETECT2
ENABLE
5
12
N/C
6
11 N/C
DETECT1
7
10
N/C
8
9
C3
R1
C4
1
XTAL/
CLOCK
C1
MX643P
MX643DW
VDD
C2
VSS
SIGIN
C1
N/C
C1
1.0nF
±20
R1
1MΩ
±10
C2
1.0µF
±20
C1
560pF at 3.3VDD
±20
1.0nF at 5.0VDD
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.
© 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
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.
© 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
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 VSS
-0.3
VDD + 0.3
V
VDD
-30
30
mA
VSS
-30
30
mA
Any other pin
-20
20
mA
Current
P/DW Package
Total Allowable Power Dissipation at TAMB = 25°C
800
mW
13
mW/°C above 25°C
Derating 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
© 1996 MX•COM, INC.
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Doc. #20480148.001
Call Progress Tone Detector
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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 = - 40°C to 85°C. 0dB = 775mVRMS.
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
20%
VDD
5.0
µA
Enable Input
Input Logic 1 Level
2
Input Logic 0 Level
2
Input Leakage Current (VIN = 0 to VDD)
2
Input Capacitance
2
80%
VDD
-5.0
10.0
pF
Detect Output
Output Logic 1 Level (lOH = 120µA)
3
Output Logic 0 Level (lOL = 360µA)
3
90%
VDD
10%
VDD
AC Parameters
SIGIN pin
4
Input Signal Level
5
-40
dB
Input Signal Dynamic Range
5
40
dB
16
dB
Signal to Noise Ratio
350
kΩ
Input Impedance (at 100Hz)
Clock Input
'High' Pulse Width
6
40
ns
'Low' Pulse Width
6
40
ns
Input Impedance (at 100Hz)
10
MΩ
Gain (input = 1mVRMS at 100Hz)
20
dB
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.
© 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
Timing Characteristics
For the following conditions unless otherwise specified:
Xtal Frequency = 3.579545MHz, VDD = 3.3V to 5.0V, TAMB = - 40°C to 85°C, S/N = 20dB.
Notes
Timing (ref. Figures 3, 4, 5 and 6)
tI
Burst Length Ignored
Min.
Typ.
1
Max.
Units
70
ms
tL
Burst Length Detected
1
tGI
Call Progress Tone Gap Length Ignored
1, 2
tGD
Call Progress Tone Gap Length Detected
1, 2
tRP
Call Progress Tone Response Time
1
145
ms
tDRP
Call Progress Tone De-response Time
1
145
ms
tGDR
Gap Detected Recorded
1, 3
4
tNG
Non Call Progress Signal Gap Length Ignored
tNRP
Non Call Progress Signal Response Time
tDNRP
Non Call Progress signal De-response Time
tCH
State Change
tV
DETECT1, DETECT2, and DETECT3 Response
Time
145
ms
20
40
ms
ms
6
ms
80
145
ms
ms
80
0
ms
ms
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
tI
SIGIN
tL
No Signal
tGD
Call Progress
Low Band
Call Progress
High Band
tGI
Call Progress
High Band
tRP
ENABLE
Call Progress
High Band
tRP
tDRP
tRP
tDRP
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)
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Doc. #20480148.001
Call Progress Tone Detector
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MX643 - Preliminary Information
tL
tI
No Signal
SIGIN
tNG
Non Call
Progress Signal
Non Call
Progress Signal
ENABLE
tNRP
tNDRP
0 Level
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.
Figure 4: Timing Diagram: Non Call Progress Signal
SIGIN
No Signal
Non Call
Progress Signal
Call Progress
Low Band
Call Progress
Low Band
ENABLE
tNRP
tRP
DETECT1
tRP
tDRP
DETECT2
tCH
DETECT3
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
tI
No Signal
SIGIN
tGD
tL
Special
Information
Tone
tGI
Special
Information
Tone
Special
Information
Tone
Special
Information
Tone
tRP
ENABLE
DETECT1
DETECT2
tRP
tDRP
tRP
tDRP
0 Level
tGDR
0 Level
DETECT3
Figure 6: Timing Diagram: Special Information Tones
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Call Progress Tone Detector
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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
SINGLE TONE
DETECT 3
SIT
SIT
SIT
1858Hz
1716Hz
0V
1489Hz
VOICE
1343Hz
VOICE
DETECT 2
1041Hz
5V
896Hz
0V
5V
DETECT 1
894Hz
701Hz
596Hz
340Hz
200Hz
0V
NOT DRAWN TO SCALE
Figure 8: MX643 Frequency Sweep Results
© 1996 MX•COM, INC.
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Doc. #20480148.001
Call Progress Tone Detector
12
MX643 - Preliminary Information
6.2 Packaging
Package Tolerances
A
DIM.
B
J1
PIN1
E1
T
K1
P
Y
M
K
H
L
A
B
C
E
E1
F
H
J
J1
K
K1
L
M
P
T
Y
E
C
J
F
MIN.
TYP.
MAX.
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
ALTERNATIVE
PIN
LOCATION
MARKING
B
DIM.
E
W
L
T
PIN 1
X
Y
C
H
K
P
J
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°
NOTE : All dimensions in inches (mm.)
Angles are in degrees
Figure 10: 16-pin SOIC Mechanical Outline: Order as part no. MX643DW
© 1996 MX•COM, INC.
Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054
Doc. #20480148.001
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