DATA BULLETIN
MX613
MXCOM MiXed Signal CMOS
Covers Worldwide Call Progress Frequencies
(300Hz TO 2150Hz)
Decode Single or Modulated Tones
SERIAL CLOCK
Global Call Progress Detector
PRELIMINARY INFORMATION
Analog In / Serial Data Out
µProcessor Compatible Outputs
Speech Discrimination Ability
Low Power Operation
DATA OUT
0 1 2 3 4 5
SERIAL OUTPUT
PORT (6-BITS)
CHIP SELECT
V DD
CS
AVAILABLE
PACKAGES
LATCH
COUNT
TIME
SIGNAL IN
f
FILTER &
BAND SELECTOR
HI / LO BAND
f/4
FREQUENCY
COUNTER
RESET
LEVEL IN
LEVEL
DETECTOR
MX613DW
16-pin SOIC
VBIAS
DECODE
ON / OFF
HI / LO
V SS
f/4
SIGNAL QUALITY
ASSESSOR
RESET
GOOD/BAD
LOGIC
RESET
CS
HI / LO
TIME
XTAL/CLOCK
3.579545MHz
MX613P
14-pin PDIP
IRQ
CLOCK
GENERATOR
TIMER
LO = 39.4ms
HI = 13.16ms
XTAL
The MX613 is a wide-band, ‘N-Tone’ non-predictive tone decoder that measures telephone system call progress
tones in PABX, Pay/Feature-Phone, Fax and Modem systems.
Adhering to Must/Must-Not Decode limits and able to measure inband frequencies in outband modulation, this
decoder measures the frequency of input signals in the range 300 to 2,150Hz. The result of each measurement is
presented to a system µProcessor as a 6-bit serial word.
The decode frequency range, which covers the world's call progress application spectrum, is processed internally
as two bands: LO = 300 to 660Hz and HI = 900 to 2150Hz. Frequency measurement is achieved by counting the
number of cycles in a set time period
(LO = 39.47ms or HI = 13.16ms). Bad signal/level quality or
N
OTONE
results in a count-abort, timing-reset and no
output from the decoder.
Front-end filtering is achieved using our patented Auto-Correlator. Current frequency information is output for the
µProcessor
using a Serial Data, Clock and Interrupt interface.
Data from the MX613 should be processed by a µProcessor whose algorithms are able to recognize the
frequency, sequence and/or cadence of input signals as national call progress information; e.g.: ‘Dial,’ ‘Busy,’
‘Number-Unobtainable,’ ‘Ringing’ and automatic tones used by fax and modem systems. Software can be simply
configured to reject speech frequencies.
Available in SOIC and PDIP packages, this low-cost, mixed signal IC has a typical power requirement of less
than 1mA at 3 volts and utilizes a telecom-system clock input of 3.579545MHz to maintain frequency accuracy.
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: 910 744-5054
Doc. # 20480086.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USAAll trademarks and service marks are held by their respective companies
CMLMICRO [ CML MICROCIRCUITS ]
