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DATA BULLETIN
MX633
Features
* * * * * * * * Worldwide Tone Compatibility Single and Dual Tones Detected U.S. Busy-Detect Output Voice-Detect Output Wide Dynamic Range > 40dBm Low Supply Current (0.3mA/0.5mA) Low Supply Voltage (3.3V/5.0V) Standard 3.58MHz Xtal
Call Progress Tone Detector
PRELIMINARY INFORMATION
Applications
* Automatic Calling Products
XTAL/ CLOCK XTAL / CLOCK OSCILLATOR XTAL
VDD VSS
ENABLE
DETECT1 SIGIN SLICER SIGNAL ANALYZER CONTROL LOGIC
DETECT2
The MX633 is a low cost, low power device that uses signal processing techniques to detect audible tone signals such as Dial, Ringing, Busy and other conditions found when placing a call throughout the world's telecom systems. Detection of these call progress stages is essential to the proper operation of automatic calling products. The MX633 adds new features to Call Progress monitoring. It detects and indicates the `U.S. Busy' tones, reducing the need to measure `tone cadence' to identify `U.S. Busy'. It also detects and indicates voice and other signals from Call Progress tones, reducing voice-falsing and adding voice-answer as a connection prompt. The MX633 may be used with a 3.0V to a 5.5V supply and is available in the following package styles: 8-pin PDIP (MX633P) and 16-pin SOIC (MX633DW).
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
2
MX633 - PRELIMINARY INFORMATION
CONTENTS
Section ............................................................................................................................................... Page 1. Block Diagram .................................................................................................................................. 3 2. Signal List ......................................................................................................................................... 4 3. External Components ...................................................................................................................... 5 4. General Description ......................................................................................................................... 6
4.1 Glossary .................................................................................................................................................... 6 4.2 Overall Function Description ..................................................................................................................... 6 4.3 Block Diagram Description (Reference Figure 1)...................................................................................... 6
4.3.1 Slicer ..................................................................................................................................................................6 4.3.2 Signal Analyzer ..................................................................................................................................................6 4.3.3 Control Logic......................................................................................................................................................7 4.3.4 Xtal/Clock Oscillator...........................................................................................................................................7
4.4 Decode Output Truth Table....................................................................................................................... 7
5. Performance Specification.............................................................................................................. 7
5.1 Electrical Performance .............................................................................................................................. 7
5.1.1 Absolute Maximum Ratings ...............................................................................................................................7 5.1.2 Operating Limits.................................................................................................................................................8 5.1.3 Operating Characteristics ..................................................................................................................................8 5.1.4 Timing ................................................................................................................................................................9
5.2 Packaging ................................................................................................................................................ 11
MX*COM, Inc. reserves the right to change specifications at any time and without notice
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
3
MX633 - PRELIMINARY INFORMATION
1. Block Diagram
C1 R1 C2
XTAL/ CLOCK X1 XTAL XTAL / CLOCK OSCILLATOR
VDD VSS C4
ENABLE
DETECT1 SIGIN C3 SLICER SIGNAL ANALYZER CONTROL LOGIC
DETECT2
Figure 1: Block Diagram
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
4
MX633 - PRELIMINARY INFORMATION
2. Signal List
Package / Pin No. P 1 2 3 DW 2 3 5 XTAL/CLOCK
XTAL
Signal
Type input output input
Description Input to the on-chip oscillator, for external Xtal circuit or clock Output of the on-chip oscillator inverted A logic 1 applied to this input enables the decoder and detection outputs. A logic 0 pulse of at least 1s applied to this input resets the decoder circuits and forces both DETECT1 and DETECT2 outputs to a logic 0. When a Call Progress signal is detected, DETECT1 output state changes 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 Output used in conjunction with DETECT1. When a Call Progress High Band signal is detected and DETECT1 output state is a logic 1, then DETECT2 output state changes to a logic 1. When a Non Call Progress signal is detected and DETECT1 output state is a logic 0, then DETECT2 output state changes to a logic 0. Positive supply. This pin should be bypassed to VSS by a capacitor mounted close to the device pins. Table 1: Signal List
ENABLE
4 5 6 7
7 10 12 13
DETECT1 SIGIN VSS DETECT2
output input power output
8
15
VDD
power
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
5
MX633 - PRELIMINARY INFORMATION
3. External Components
XTAL/ CLOCK X1
XTAL C2 ENABLE 2 DETECT2 7
C1
1
VDD
8
C4
R1
MX633P
3 6
VSS
DETECT1
4
SIGIN
5
C3
Figure 2: Recommended External Components R1 C1 C2 C3 C4 X1 Note 1 1 M 33pF 33pF 560pF at 3.3VDD 1nF at 5.0VDD 1.0F 3.579545MHz 10% 20% 20% 20% 20% refer to sec.5.1
Table 2: Recommended External Components Notes: 1. For best results, a crystal oscillator design should drive the clock inverter input with signal levels of at least 40% of VDD, peak to peak. Tuning fork crystals generally cannot meet this requirement. To obtain crystal oscillator design assistance, consult your crystal manufacturer.
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
6
MX633 - PRELIMINARY INFORMATION
4. General Description
The following Glossary and Decode Truth Table (found in section 4.4), describe the MX633 decoding features and functions.
4.1 Glossary
Call Progress Tones: The single and dual frequency tones in the range 350Hz to 620Hz specified widely for call progress signaling. Call Progress Band: The nominal range 340Hz to 650Hz within which the MX633 will detect Call Progress tones. The detection algorithm requires that the tones have the characteristics typical of Call Progress Tones. Call Progress Low Band: The nominal range 340Hz to 490Hz. The MX633 will detect single or dual tones falling entirely within this range as Call Progress Low Band tones. Call Progress High Band: The nominal range 600Hz to 650Hz. Single tones in this range, or dual tones (e.g. 480 + 620Hz), having a material frequency component within this range are detected as Call Progress High Band tones. 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 MX633 will usually interpret this 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. No Signal: A signal falling outside the nominal range 120Hz to 900Hz or the absence of an input signal. Either will be detected as a No Signal condition. 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 MX633 Call Progress Tone Detector uses tone detection methods different from those methods commonly found in other Call Progress Tone Detectors. Many Call Progress Tone Detectors 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 checked against a level threshold. Any signal of acceptable level in this frequency band is classified as a Call Progress tone, including speech and noise signals. False outputs caused by speech are commonly indicated by such products and background noise may lead to a stuck detect output. In contrast, the MX633, uses a stochastic signal processing technique. This technique is based on analysis of both the frequency and time domains, with signal amplitude forming a small part in the decision process. This analysis includes checks on whether the signal has a profile that matches international standards for Call Progress tones, speech, noise or other Non-Call-Progress signals. It also checks for U.S. Busy signal tones.
4.3 Block Diagram Description (Reference Figure 1)
4.3.1 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. 4.3.2 Signal Analyzer The frequency range, quality and consistency of the input signal is analyzed by this functional block. To be classified as a call progress signal, the input signal frequencies should lie between 340Hz and 650Hz. The signal to noise ratio must be 16dB or greater and the signal must be consistent over a period of about 140 ms. This decode criteria is continuously monitored and the assessment 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.
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
7
MX633 - PRELIMINARY INFORMATION
4.3.3 Control Logic This block categorizes the nature of the signal into various decode output states and controls the two output pins. See Table 3. 4.3.4 Xtal/Clock Oscillator If the on-chip Xtal oscillator is to be used, then external components X1, R1, C1 and C2 are required. If an external clock source is to be used, then it should be connected to the XTAL/CLOCK input pin and the XTAL pin should be left unconnected.
4.4 Decode Output Truth Table
DETECT2 0 0 DETECT1 0 1 No Signal Call Progress Low Band: Will detect 350+440, 400+450, 440+480,400, 425, 440, and 450Hz tones Call Progress High Band: Will detect 480+620, 600 and 620Hz tones Non Call Progress signal, e.g. voice activity CONDITIONS
1 1 Note:
1 0
1. DETECT1 responds to the entire range of call progress tones from 340Hz to 650Hz. Table 3: Decode Output Truth Table
5. Performance Specification
5.1 Electrical Performance
5.1.1 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 DW / DIP Package Total Allowable Power Dissipation at TAMB = 25C Derating above 25C Storage Temperature Operating Temperature
- 55 - 40 - 30 - 30 - 20
Min.
- 0.3 - 0.3
Max. 7.0 VDD + 0.3 30 30 20 800 13 125 85
Units V V mA mA mA mW mW/C above 25C C C
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
8
MX633 - PRELIMINARY INFORMATION
5.1.2 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
5.1.3 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, VSS = 0V, TAMB = 25C, 0dB = 775mVRMS. Notes DC Parameters Supply Current IDD (ENABLE = 1) IDD (ENABLE = 1) 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 (from 100Hz to 2kHz at 5.0V) Input Signal Level Input Signal Dynamic Range Signal to Noise Ratio Xtal/Clock Oscillator 'High' Input Pulse Width 'Low' Input Pulse Width Input Impedance (at 100Hz) Gain (input = 1mVRMS at 100Hz) Operating Characteristics Notes: 1. Not including any current drawn from the device pins by external circuitry. 2. ENABLE pin. 3. DETECT1 and DETECT2 pins. 4. Small signal impedance over the frequency range 100Hz to 2000Hz and at 5.0V 5. The input level is not critical as the detector uses a stochastic algorithm. 6. Timing for an external input to the XTAL/CLOCK pin. 6 6 40 40 10 20 ns ns M dB 4 5 5 40 16 350
-
Min.
Typ.
Max.
Units
(VDD = 5.0V) (VDD = 3.3V)
1 1 2 2 2 2 3 3 90%
- 5.0
0.5 0.3 80%
1.0 0.7
mA mA VDD
20% 5.0 10.0
VDD A pF VDD
10%
VDD
k dB dB dB
40
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
9
MX633 - PRELIMINARY INFORMATION
5.1.4 Timing For the following conditions unless otherwise specified: Xtal Frequency = 3.579545MHz, VDD = 3.3V to 5.0V, TAMB =25C, S/N = 20dB Timing (ref. Figures 3, 4, 5 and 6) tI Call Progress Burst Length Ignored tL Burst Length Detected tGI Call Progress Tone Gap Length Ignored tGD Call Progress Tone Gap Length Detected tRP Call Progress Tone Response Time tDRP Call Progress Tone De-response Time tGDR Gap Detected Recorded tNG Non Call Progress Signal Gap Length Ignored tNRP Non Call Progress Signal Response Time tNDRP Non Call Progress Signal De-response Time tCH State Change tV DETECT1 and DETECT2 Response Time Timing Notes: 1. Only applies to bursts of the same frequency. 2. For dual tones in 16dB SNR the Response Time may be longer. 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 and DETECT2 state when ENABLE is high.
tI tL tGD tGI
Notes
Min. 145
Typ.
Max. 70 20
1 1 2 3 4
40 145 145 6 80 145 80 0
5
145
Units ms ms ms ms ms ms ms ms ms ms ms ms
SIGIN
No Signal
Call Progress Low Band
Call Progress High Band
Call Progress High Band tRP
Call Progress High Band
ENABLE
tRP
tDRP
tGDR tRP tDRP
DETECT1
DETECT2
Figure 3: Timing Diagram: Call Progress Tone (s)
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
10
MX633 - PRELIMINARY INFORMATION
tI
tL
tNG No Signal
SIGIN
Non Call Progress Signal
Non Call Progress Signal
ENABLE 0 LEVEL DETECT1 tNRP DETECT2 tNDRP
Figure 4 : Timing Diagram: Non Call Progress Signal
SIGIN
No Signal
Call Progress Low or High Band
Non Call Progress Signal
Call Progress Low or High Band
ENABLE tRP DETECT1 tNRP DETECT2 tCH tRP
Figure 5 : Timing Diagram: Call Progress Tone (s) to Non Call Progress Signal
tV DETECT 1 DETECT 2 XTAL/CLOCK tS = the time at which XTAL/CLOCK becomes stable indeterminate signal valid signal
Figure 6: Timing Diagram: DETECT 1 and DETECT 2 Response Time when ENABLE is high
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003
Call Progress Tone Detector
11
MX633 - PRELIMINARY INFORMATION
5.2 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 7 : 8-pin PDIP Mechanical Outline: Order as part no. MX633P
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) 0.299 (7.59) 0.286 (7.26) 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) 0.016 (0.41) 0.050 (1.27) 0.050 (1.27) 0.009 (0.23) 0.0125 (0.32) 45 0 10 7 5 5
ALTERNATIVE PIN LOCATION MARKING
NOTE : All dimensions in inches (mm.) Angles are in degrees
Figure 8 : 16-pin SOIC Mechanical Outline: Order as part no. MX633DW
(c) 1997 MX*COM Inc.
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA
www.mxcom.com Tele: 800 638-5577 910 744-5050
All trademarks and service marks are held by their respective companies.
Fax: 910 744-5054
Doc. # 20480135.003

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