MX623 Datasheet | CML

DATA BULLETIN MX623 Line-Powered Call Progress Tone Detector - MX- Mi Xed Signal CMOS - Custom Tone Decoder (13 Call-Progress Frequencies Recognized) - Operates to a 3.579545MHz Telephone System Clock - Operates Under Simple Logic or µProcessor System Control PRELIMINARY INFORMATION - Measures Call Progress Tone Frequencies (‘Busy’, ‘Dial’, ‘Fax-Tone’ etc.) - Telephone, PABX, Fax and Dial-Up Modem Applications - Low-Power Requirement (600µA at 3.3 Volts TYP) for Line-Powered Applications SIGNAL IN CHIP SELECT LIMITER DIGITAL FILTER XTAL/CLOCK XTAL HOLD PURS XTAL/CLOCK Clocks OSCILLATOR CONTROL CIRCUITRY MEASUREMENT DECODE Clocks TIMER DATA CHANGE OUTPUT LATCHES DATA OUTPUTS Q0 Q1 Q2 Q3 AVAILABLE PACKAGES MX623P 16-pin PDIP The MX623 is a low-power decoding integrated circuit that measures the frequency of telephone system call progress tones. With progress signals input from the telephone line, this single-chip product is programmed to recognize up to thirteen of the World's most monly used call-progress frequencies, analyze signal quality, and present the measured result as a 4-bit parallel data word at the tri-state Data Output. Using the parallel information from the MX623, the host system, can recognize such call progress information as: ‘Dial’, ‘Busy’, ‘Number Unobtainable’, ‘Ringing’ and Fax/Modem system signals. This information can then be used in simple or plex applications to control telephone operations. The data output will require a software format that can analyze the frequency information from the MX623. Requiring only a single 3.0[MIN] volt power supply, the MX623 may be line-powered and will operate under simple logic or system µProcessor control using the 'Data-Change, 'Hold' and 'Chip-Select' functions. The MX623, whose small size and low power consumption makes it ideal for remote applications, requires a 3.579545MHz telephone system clock or Xtal input, is available in a 16-pin PDIP. © 1997 MX- Inc. .mx. Tele:...