M-980-02 3V/5V General Purpose Call Progress Tone Detector Features • Covers the 315 to 640 Hz range (common call progress) • Sensitivity to -38 dBm • Dynamic range over 38 dB • 40 ms minimum detect • 8-pin DIP or 16-pin SOIC • Single supply CMOS (low power) • Supply range 2.8 to 5.5 VDC • Inexpensive 3.58 MHz time base • Low power consumption (<_15 mW at 3V) Applications • Automatic dialers • Dialing modems • Traffic measurement equipment • Test equipment • Service evaluation • Billing systems Pin Diagram Description The M-980-02 is an integrated circuit tone detector for general purpose use in automatic following of switched telephone calls. The circuit uses low-power CMOS techniques to provide the complete filtering and control required for this function. The basic timing of the M980-02 is designed to permit operation with almost any progress tone system. The use of integrated circuit techniques allows the M-980-02 to pack the complete frequency and amplitude portion of call progress following into a single 8pin DIP or 16-pin SOIC. A 3.58 MHz crystal-controlled time base guarantees accuracy and repeatability. 3V/5V operation increases customer flexibility, improves reliability, and minimizes power consumption. Ordering Information Part # M-980-02P M-980-02S M-980-02T Description 8-pin plastic DIP 16-pin SOIC 16-pin SOIC, Tape and Reel Block Diagram DS-M980-02-R3 www.clare.com 1 M-980-02 Absolute Maximum Ratings DC Supply Voltage (VDD - VSS) 6.0V Voltage on SIGNAL IN(VDD+ 0.5V) to (VSS-12V) Voltage on Any Pin Except SIGNAL IN (VDD + 0.5V) to VSS -0.5V Storage Temperature Range -65° to 150°C Operating Temperature -40°C to 85°C Lead Soldering Temperature 260° for 5 seconds Absolute Maximum Ratings are stress ratings. Stresses in excess of these ratings can cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of the device to the absolute maximum ratings for an extended period may degrade the device and effect its reliability. Note: Exceeding these ratings may permanently damage the M-980-02. Specifications Parameter Supply Current Signal Detection Signal Rejection Level (5V) Level (3V) Duration Level Quiet Interval Detect Duration “Detect” Output Pin Logic 0 Logic 1 Logic 0 Logic 1 “Enable”, “XIN” Input Pin “XIN” Duty Cycle “XOUT” Loading “VREF” Output Pin “SIGIN” Input Pin Power Consumption Inband (5V) Inband (3V) Outband Deviation Resistance AC + DC level Impedance (500 Hz) 3V operation 5V operation Min -38 -40 40 40 85 VDD - 0.5 VSS VDD - 0.2 40 -2 3.25 VSS - 5V 80 - Max 5 0 0 -50 -55 0 0.5 VSS + 0.2 VDD 60 10 +2 6.75 VDD 15 25 Units mA dBm dBm ms dBm dBm dBm ms ms V V V V % pF % kΩ V kΩ mW mW Notes 101,2 1,2 1,3 8 9 4 4 5 5 6 7 - Unless otherwise noted, VDD - VSS = 2.8 to 5.5 V and Ta = 25°C Notes: 1. 0 dBm = 0.775 Vrms. 2. F = 315 to 640 Hz. 3. F > 1025 Hz, < 190 Hz. 4. Output current = 1 mA, VSS - VDD - 3.0V. 5. Input current - 10 mA max. 6. External clock. 7. Nominal = (VDD + VSS)/2. 8. Signal dropping from -38 to -65 dBm. 9. Signal dropping from -10 to -65 dBm. Pin Description Pin Descriptions SIGIN Signal input AC or DC coupled (see level limitations elsewhere). DETECT Active output indicating signal detection. Activated by ENABLE. ENABLE Enables DETECT output. Used to mask signal activity. VDD Most positive power supply pin. VREF Internally generated reference voltage. (VSS + VDD) /2 volts. VSS Most negative power supply pin. XIN, XOUT Crystal attachment pins. XIN may be used as the input for an external 3.58 MHz clock. 2 www.clare.com Rev. 3 M-980-02 Signal Timing Call Progress Tone Detection Call progress tones are audible tones sent from switching systems to calling parties to show the status of calls. Calling parties can identify the success of a call placed by what is heard after dialing. The type of tone used and its timing vary from system to system, and though intended for human ears these signals can provide valuable information for automated calling systems. The M-980-02 is a signal detector sensitive to the frequencies most often used for these progress tones. Electronic equipment monitoring the DETECT output of the M-980-02 can determine the nature of signals present by measuring their duty cycle. See Figure 4 for a diagram of a circuit that could be used to permit a microcomputer to directly monitor tones on the telephone line. Much of the character of the progress tones is in their duty cycle or cadence (sometimes referred to as interruption rate). This information, coupled with level and frequency indication from the M980-02, can be used to decide what progress tones have been encountered. Table 5 shows some call progress tones with on/off times; 0.25/0.25 being 250 ms on, 250 ms off on a repeating basis. For example, dial tones as shown in the table are usually “on” continuously and last until the first dial digit is received by the switching system. Line Busy, on the other hand, is turned off and on at a rate of 1 Hz with a 50% duty cycle, or an interruption rate of 60 times per minute (60 IPM). The tones can be distinguished in this way. It should be noted that while such techniques will usually be effective, there are some circumstances in which the M-980-02 cannot be accurately used. Examples include situations where ringback tone may be short or not even encountered. Ringback may be provided at ringing voltage frequency (20 or 30 Hz) with some harmonics and may not fall in the detect range, and speech or other strong noise may obscure tones making cadence measurement difficult. Detection of “answer” is most difficult for many reasons. One way to determine if a called party has answered is by looking for a short burst of DETECT indications without a cadence match (produced by a click and “hello” at the far end). Some applications will require special methods like speech detection, but most can be reliably handled with the M-980-02 and simple cadence measurement. As can be seen, the tones used for the same purposes in different systems may not be the same. Standards do exist and should be consulted for your particular application. In North America AT&Ts “Notes on the Network” or EIAs RS-464 PBX standard should be reviewed. In Europe tone plans may vary with locale, in which case the CEPT administration in each country must be consulted. Outside these areas, national PTT organizations can provide information on the systems within their borders. Device Timing Time tMD tID tB Value 40 ms 40 ms @ -38 dBm 85 ms @ -10 dBm 18 ms Significance A valid tone will always be detected if it is at least 40 ms long. Inter-tone gaps must be detected if greater than this duration. Drop-outs of valid tone of up to 18 ms will be ignored. Note: Application or removal of high level signals outside the must detect range may cause momentary detection, which may be filtered by time guarding the output. Rev. 3 www.clare.com 3 M-980-02 Call Progress Tones Frequency 1 350 425 600 400 480 600 480 600 440 500 440 Frequency 2 +440 X 120 +620 X 120 +620 X 120 + 480 X 40 - On/Off Continuous 0.5/0.5s 0.25/0.25s 2.0/4.0s 0.5s burst Use Dial tones Line Busy Tones Reorder Tones Audible Ringing Various Telephone Line Circuit Application Detect Range 4 Input Signal Configuration www.clare.com Rev. 3 M-980-02 Mechanical Dimensions Tolerances Inches A A1 b b2 C D E E1 e ec L Min .015 .014 .045 .008 .355 .300 .240 Max .210 .022 .070 .014 .400 .325 .280 .100 BSC 0° .115 15° .150 Metric (mm) Min Max 5.33 .38 .36 .56 1.1 1.8 .20 .36 9.02 10.16 7.6 8.3 6.1 7.1 2.54 BSC 0° 15° 2.9 4.1 Tolerances Inches A A1 b D E e H L Min Max .0926 .1043 .0040 .0118 .013 .020 .3977 .4133 .2914 .2992 .050 BSC .394 .419 .016 .050 Metric (mm) Min Max 2.35 2.65 .10 .30 .33 .51 10.10 10.50 7.4 7.6 1.27 BSC 10.00 10.65 .40 1.27 Dimensions mm (inches) Rev. 3 www.clare.com 5 Worldwide Sales Offices CLARE LOCATIONS EUROPE ASIA/PACIFIC Clare Headquarters 78 Cherry Hill Drive Beverly, MA 01915 Tel: 1-978-524-6700 Fax: 1-978-524-4900 Toll Free: 1-800-27-CLARE European Headquarters CP Clare nv Bampslaan 17 B-3500 Hasselt (Belgium) Tel: 32-11-300868 Fax: 32-11-300890 Clare Switch Division 4315 N. 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Colombo 10/A I-20066 Melzo (Milano) Tel: 39-02-95737160 Fax: 39-02-95738829 http://www.clare.com Sweden Clare Sales Comptronic AB Box 167 S-16329 Spånga Tel: 46-862-10370 Fax: 46-862-10371 United Kingdom Clare UK Sales Marco Polo House Cook Way Bindon Road Taunton UK-Somerset TA2 6BG Tel: 44-1-823 352541 Fax: 44-1-823 352797 Clare, Inc. makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions at any time without notice. Neither circuit patent licenses nor indemnity are expressed or implied. Except as set forth in Clare’s Standard Terms and Conditions of Sale, Clare, Inc. assumes no liability whatsoever, and disclaims any express or implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right. The products described in this document are not designed, intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction of Clare’s product may result in direct physical harm, injury, or death to a person or severe property or environmental damage. Clare, Inc. reserves the right to discontinue or make changes to its products at any time without notice. Specification: DS-M980-02-R3 ©Copyright 2001, Clare, Inc. All rights reserved. Printed in USA. 7/20/01