M-991 Call Progress Tone Generator Features Description • • • • • • • • Generates standard call progress tones Digital input control Linear (analog) output Power output capable of driving standard line 14-pin DIP and 16-pin SOIC package types Single supply 5V CMOS (low power) Inexpensive 3.58 MHz time base Temperature range from -25ºC to 70ºC (-01 version) • Temperature range from -40ºC to 85ºC (-02 version) The M-991 is a call progress tone generator integrated circuit for use in telephone systems. The circuit uses low-power CMOS techniques to generate tones which are digitally controlled and highly linear. The M-991 is designed to permit operation with almost any system. The use of integrated circuit techniques allows the M991 to incorporate the control, tone generating, and power output buffer into a single 14-pin DIP or a 16-pin SOIC. A 3.58-MHz (color burst) crystal-controlled time base guarantees accuracy and repeatability. Applications Ordering Information • • • • • Telephone systems Test equipment Callback Security systems Billing systems Part # M-991 M-991-01SM M-991-01SMTR M-991-02SM M-991-02SMTR Description 14-pin plastic DIP 16-pin SOIC 16-pin SOIC Tape and Reel 16-pin SOIC, Extended Temperature Range 16-pin SOIC, Extended Temperature Range, Tape and Reel Pin Assignments Block Diagram DS-M991-R1 www.clare.com 1 M-991 Absolute Maximum Ratings Storage Temperature Operating Ambient Temperature Operating Ambient Temperature for the M-991-02SM VDD Any Input Voltage 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. -55° to 125° C -25° to 70° C -40° to 85° C 7.0V VSS -0.6 to VDD +0.6V Note: 1. Exceeding these ratings may permanently damage the M-991. Specifications Parameter Power Supply and Reference VDD Current Drain, IDD Min Typ Max Units Notes 4.75 - 5.25 V 1 - 2.0/4.0 - mA 8 VREF Pin: Oscillator Deviation from (VDD + VSS)/2 -2 - +2 % Internal Resistance from VREF to VDD, VSS 3.25 - 6.75 kΩ Frequency Deviation -0.01 - +0.01 % 7 External Clock: (XOUT open) VIL 0 - 0.2 V VIH VDD - 0.2 - VDD V 40 - 60 % - - 10 pF 10 - Duty Cycle XIN, XOUT Loading: Capacitance Tone Output Control Resistance 20 - - MΩ Frequency Deviation -0.5 - +0.5 % - Level 100 - 180 mV 2 Distorting Components -35 - - dB 3 Idle - - -60 dBm 4 OUTDRIVE Envelope Rise Time - - 4 ms 5 VIL - - 0.5 V 6 VIH 2.5 - - V DX, CE Pns: Mute Pins: VOL (ISINK = -100 µA) Timing VOH (ISOURCE = 100 µA) Data Setup (tDS) Data Hold (tDH) - 1.5 V - - V ns 10 - - ns Chip Enable Fall (tPL) - - 90 ns Tone On Delay (tTO) - - 5 ms Tone Off Delay (tTD) - - 5 ms Mute Delay from Outdrive (tMO) - - 200 ns Notes: (unless otherwise specified) 1. All DC voltages are referenced to VSS. 2. Vrms per tone, 540 W load. 3. Any one frequency relative to the lowest level output tone (f<4000 Hz). 4. 0 dBm = 0.775 Vrms. 5. To 90% maximum amplitude. 6. For all supply voltages in the operating range. 2 VDD - 1.5 200 11 7. At XOUT pin as compared to 3.579545 MHz. 8. OUTDRIVE with load >5 KW/OUTDRIVE with 540 W load. 9. Resistance at VREF to VDD or VSS > 1 MW. 10. Crystal oscillator active. 11. Measured 90% to 10%. www.clare.com Rev. 1 M-991 Call Progress Tone Generation Call progress tones are audible tones sent from switching systems to calling parties (or equipment) to indicate the status of calls. Calling parties can identify the success of a placed call by what is heard after dialing. The M-991 series utilizes a highly linear tone generator that produces the unique frequencies (singly or in pairs) that are common to call progress signals. Duration and frequency selection are digitally controlled (see the Data/Tone Selection table below for data settings for a particular tone output). A typical control sequence for the M-991 is: (1) set data lines to desired frequency selection, (2) wait for data lines to settle, (3) drive the chip enable (CE) low, (4) maintain CE low for desired tone duration (Note: data lines may be changed after data hold time), and (4) return CE to Data/Tone Selection D0 D1 D2 D3 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 a logic high. (Commonly used call progress tones are shown in the Data/Tone Selection table below.) In a bus-oriented system, noise on the data lines may propagate through the device and appear at the output. To safeguard against this, use an external latch to lock the data into the device. In addition, it is good practice to bypass the VREF pin to ground with a small capacitor (0.01 mF) to reduce power supply noise. The designer should be aware of device timing requirements and design accordingly. The data input pins may be tied high (+5 VDC) or low (ground) as required, but D4 and D5 must be left open. Beware of hardwiring the CE pin for dedicated tone generation. This input is edge triggered. An RC network like that shown in the Power-on Reset Circuit on Page 4 should be used to momentarily reset the device immediately following power-up to ensure proper operation. Pin Function Frequency (Hz) 1 2 350 440 400 off 440 off 440 480 440 620 480 off 480 620 350 off 620 off 941 1209 Pin CE Use Dial Tone Special Alert Tone Audible Ring Pre-empt Bell high tone Reorder(Bell low) Special Special DTMF “*” D0 - D3 D4-D5 MUTE OUTDRIVE VDD VREF VSS XIN XOUT Function Latches data and enables output (active low input). Data input pins. (See Data/Tone Selection.) Leave open. Output indicates that a signal is being generated at OUTDRIVE. Linear buffered tone output. Most positive power supply input pin. Internally generated mid-power supply voltage (output). Most negative power supply input pin. Crystal oscillator or digital clock input. Crystal oscillator output. Standard Call Progress Tones Tone Name Frequency (Hz) 1 2 Interruption Rate Dial 350 440 Steady Reorder 480 620 Repeat, tones on and off 250 ms ± 25 ms each. Busy 480 620 Repeat, tones on and off 500 ms ± 50 ms each. Audible Ring 440 480 Reat, tones on 2 ± 0.2 s, tones off 4 ± 0.4 s Recall Dial 350 440 Three bursts tones on and off 100 ms ± 20 ms each followed by dial tone. Special AR 440 480 Tones on 1 ± 0.2s, followed by single 440 Hz on for 0.2s on, and silence for 3 ± 0.3 s, repeat. Intercept 440 620 Repeat alternating tones, each on for 230 ms ± 70 ms with total cycle of 500 ± 50 ms. Call Waiting 440 Off One burst 200 ± 100 ms Busy Verification 440 Off One burst of tone on 1.75 ± 0.25 s before attendant intrudes, followed by burst of tone 0.65 ± 0.15 s on, 8 to 20 s apart for as long as the call lasts Executive Override 440 Off One burst of tone for 3 ± 1 s before overriding station intrudes Confirmation 350 440 Three bursts on and off 100 ms each or 100 ms on, 100 ms off, 300 ms on Rev. 1 www.clare.com 3 M-991 Power-on Reset Circuit Timing Diagram Expanded Timing Diagram Typical Application 4 www.clare.com Rev. 1 M-991 Mechanical Dimensions Tolerances Inches A A1 b b2 C D E E1 e ec L Min .015 .014 .045 .008 .735 .300 .240 Max .210 .022 .070 .014 .775 .325 .280 .100 BSC 0° .115 15° .150 Metric (mm) Min Max 5.33 .38 .36 .56 1.1 1.8 .20 .36 18.7 19.7 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. 1 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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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-M991-R1 ©Copyright 2001, Clare, Inc. All rights reserved. Printed in USA. 7/26/01