FX613P データシートの表示（PDF） - CML Microsystems Plc
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FX613P Datasheet PDF : 8 Pages
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CML Semiconductor Products
PRODUCT INFORMATION
FX613 Universal Call Progress Decoder
Features
Covers Worldwide Call Progress
Frequencies (300Hz to 2,150Hz)
3 Volt <1mA Requirement
Decodes Single or Modulated
Tones
Analogue In/Serial Data Out
Publication D/613/3 December 1995
Speech Discrimination Ability
µProcessor Compatible Outputs
Telephone/Telecoms, Radio and
Fax/Modem Applications
Mixed Analogue/Digital
Technology
VDD
SIGNAL IN
LEVEL IN
SERIAL CLOCK
CHIP SELECT
SERIAL OUTPUT
PORT (6-BITS)
CS
LATCH
FILTER &
BAND SELECTOR
f
f/4
HI / LO BAND
COUNT
FREQUENCY
COUNTER
RESET
LEVEL
DETECTOR
DECODE
ON / OFF
HI / LO
DATA OUT
012345
TIME
VBIAS
FX613
V SS
f/4
SIGNAL QUALITY GOOD/BAD
ASSESSOR
LOGIC
RESET
RESET
CS
HI / LO
TIME
XTAL/CLOCK
3.579545MHz
CLOCK
GENERATOR
TIMER
LO = 39.4ms
HI = 13.16ms
IRQ
XTAL
Fig.1 Functional Block Diagram
Brief Description
The FX613 is a wide-band, ‘N-Tone’, non-predictive
tone decoder to measure 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 300Hz 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 = 300Hz to 660Hz and HI =
900Hz 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 NOTONE results in a count-abort, timing-reset and no
output from the decoder.
Current frequency information is output for the
µProcessor using a Serial Data, Clock and Interrupt
interface.
Data from the FX613 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
employed by Fax, Modem systems. Software can be
simply configured to reject speech frequencies.
Due to its ‘N-Tone’, non-predictive decoding capability,
units employing the FX613 can be redeployed under a
new national standard by a simple software amendment.
Available in 16-pin plastic S.O.I.C. SMD and 14-pin
plastic DIL packages, this low-cost, mixed analogue/digital
microcircuit 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.
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