Maker : Clare Inc.
Part No. : M-991-01SMTR

  Datasheet PDF : M-991-01SMTR.pdf
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Product Information

M-991 Call Progress Tone Generator Features 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) • • • • • • • • Applications • • • • • Telephone systems Test equipment Callback Security systems Billing systems Description 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. Ordering Information 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 -55° to 125° C -25° to 70° C -40° to 85° C 7.0V VSS -0.6 to VDD +0.6V 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: 1. Exceeding these ratings may permanently damage the M-991. Specifications Parameter Power Supply and Reference VDD Current Drain, IDD VREF Pin: Deviation from (VDD + VSS)/2 Internal Resistance from VREF to VDD, VSS Oscillator Frequency Deviation External Clock: (XOUT open) VIL VIH Duty Cycle XIN, XOUT Loading: Capacitance Resistance Tone Output Frequency Deviation Level Distorting Components Idle OUTDRIVE Envelope Rise Time Control DX, CE Pns: VIL VIH Mute Pins: VOL (ISINK = -100 µA) Timing VOH (ISOURCE = 100 µA) Data Setup (tDS) Data Hold (tDH) Chip Enable Fall (tPL) Tone On Delay (tTO) Tone Off Delay (tTD) Mute Delay from Outdrive (tMO) 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. Min 4.75 -2 3.25 -0.01 0 VDD - 0.2 40 20 -0.5 100 -35 2.5 VDD - 1.5 200 10 - Typ 2.0/4.0 - Max 5.25 +2 6.75 +0.01 0.2 VDD 60 10 +0.5 180 -60 4 0.5 1.5 90 5 5 200 Units V mA % kΩ % V V % pF MΩ % mV dB dBm ms V V V V ns ns ns ms ms ns Notes 1 8 7 10 2 3 4 5 6 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%. 2 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 ...

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