M-984-02
Special Information Tone Detector
Features • Detects single-frequency tones used for error indication and call progress in telephone systems • Provides detection windows for: 400/425 Hz (Call Progress) 950 Hz (Special and error indication) 1400 Hz (Special and error indication) 1800 Hz (Special and error indication) • Separate tri-state outputs for each tone window • Inexpensive 3.
58 MHz crystal time base • Auxiliary 3.
58 MHz clock output • 14-pin DIP package and 16-pin SOIC package • Single supply 3 to 5 volt (low power
CMOS) • Wide dynamic range (30 dBm) Applications • • • • • • Automatic dialers Modems Telecom test equipment Telephone traffic measurement, Service evaluation Billi...