MX623 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – Line-Powered Call Progress Tone Detector

DATA BULLETIN
MX623 Line-Powered Call Progress
Tone Detector
• MX•COM MiXed 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
V_DD
MEASUREMENT
AND
DECODE
V_SS
Clocks
TIMER
DATA
CHANGE
OUTPUT
LATCHES
DATA
OUTPUTS
Q0
Q1
Q2
Q3
IRQ
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 commonly 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 complex 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•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: [phone]
Doc. # 20480091.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.