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 4 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. 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 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 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. © 1996 MX•COM, INC. Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054 Doc. #20480148.001 Call Progress Tone Detector 7 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. 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 = - 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 9 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) © 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 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 © 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 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. Tele: 800 638 5577, 910 744 5050, Fax: 910 744 5054 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