M-984-02 Special Information Tone Detector Description Features The M-984-02 Special Information Tone Detector is a Detects single-frequency tones used for error monolithic integrated circuit designed to provide reli- indication and call progress in telephone systems able detection of many common telephone network Provides detection windows for: status signals. In particular, it detects the signals 400/425 Hz (Call Progress) known as Special Information Tones (SITs) or error 950 Hz (Special and error indication) tones as defined by the CCITT, and single tones often 1400 Hz (Special and error indication) used as dial tone, audible ringing, and other general 1800 Hz (Special and error indication) progress indications. The M-984-02 uses CMOS Separate tri-state outputs for each tone window switched capacitor filters and a crystal time base to Inexpensive 3.58 MHz crystal time base achieve the high stability and accuracy specified. Each Auxiliary 3.58 MHz clock output tone detection window has an associated output pin, 14-pin DIP package and 16-pin SOIC package which can be placed in a high impedance state for use Single supply 3 to 5 volt (low power CMOS) with time-share microcomputer bus applications. Wide dynamic range (30 dBm) In comparison with the earlier M-984, the M-984-02 Applications has wider acceptance bands for SIT tones to facilitate Automatic dialers reception of tape-loop tones, lower power consump- Modems tion at 5V operation, 3V operation, superior tempera- Telecom test equipment ture performance, lower cost, and is available in DIP, Telephone traffic measurement, SOIC, and SOIC tape and reel versions. Service evaluation Billing equipment Ordering Information Part Description Pin Diagram M-984-02P 14-pin plastic DIP M-984-02S 16-pin plastic, SOIC M-984-02T 16-pin SOIC, Tape and Reel Block Diagram DS-M984-02-R3 1 www.clare.comM-984-02 Absolute Maximum Ratings Absolute Maximum Ratings are stress ratings. Stresses in DC Supply Voltage 7V excess of these ratings can cause permanent damage to Input Voltage on SIGIN V - 6.5V to V +0.3V SS DD the device. Functional operation of the device at these or Input Voltage on Any Pin V - 0.3 to V + 0.3V SS DD any other conditions beyond those indicated in the opera- (except SIGIN) tional sections of this data sheet is not implied. Exposure of Storage Temperature Range -40C to +150C the device to the absolute maximum ratings for an extend- ed period may degrade the device and effect its reliability. Operating Temperature Range -40C to +85C Lead Soldering Temperature 260C for 5 seconds Note: Exceeding these ratings may permanently damage the device. Specifications Parameter Conditions Min Max Units Operating Conditions V - 2.7 5.5 V DD Power supply noise 0.1 - 5 kHz - 20 mV p-p Power Current drain (I)V open - 15 mA DD REF V V - 48% of V 52% of V V REF REF DD DD Impedance - 3.25 8.25 k Signal Detection Frequency Range - Note 1 Note 1 - Level: V = 5.0V - -30 (24.5 mV) 0 (775 mV) dBm DD Level: V = 3.0V - -33 (17.4 mV) -3 (173.5 mV) dBm DD Duration f = 400 Hz 85 - ms c f = 950, 1400, 1800 Hz 50 - ms c Bridge Time - - 15 ms Signal to Noise Ratio - 16 - dB Signal Rejection Frequency Range - Note 1 Note 1 - Level: V = 5.0V - - -40 (7.8 mV) dBm DD Level: V = 3.0V - - -43 (5.5 mV) dBm DD Duration - - 50 ms Outputs Except X358 V I = -1.0 mA - 0.5 V OL SINK V I = 1.0 mA V -0.5 - V OH SOURCE DD Dn pins only I V = V , V -1 A OZ O DD SS Inputs EN pin V - - 0.5 V IL V V = 5V V -2.0 - V IH DD DD V = 2.7V V - 0.5 - V DD DD Pull-up and Pull- MODE = V V = 5V 12.5 50 A SS DD down currents V = 2.7V 4 20 A DD /XRANGE +V -2 6 A SS MODE2 = V V = 5V 12.5 100 A DD DD V = 2.7V 12.5 25 A DD PD = V - 4 10 A DD SIGIN pin Voltage range - -6.5 V V DD Input impedance f = 500 Hz 80 - k Input Spectrum - - 28 kHz Clock External clock V XOUT open - 0.2 V IL connected to V XOUT open V - 0.2 - V IH DD XIN pin Duty cycle XOUT open 40 60 % XIN, XOUT with Capacitance - - 10 pF crystal ocs. active Internal res. - 20 - M X358 pin V C = 20 pF, I = -1.0 mA - 0.5 V OL L SINK V C = 20 pF, I = 1.0 mA V - 0.5 - V OH L SOURCE DD Duty cycle C = 20 pF 40 60 % L Tri-state Operation t (High Z to Low Z) C = 50 pF - 250 ns EN L t (Low Z to High Z) RL = 100 K - 250 ns DE Unless otherwise noted, specifications hold over V - V = 2.8V to 5.5V power supply, and T -40C to +85C. DD SS OL Notes: 1. See the Detector Frequency Windows table on page 4 for detection/ rejection frequencies. Rev. 3 2 www.clare.com