CLARE M-980-02S 3v/5v general purpose call progress tone detector Datasheet

M-980-02
3V/5V General Purpose Call Progress Tone Detector
Features
• Covers the 315 to 640 Hz range (common call
progress)
• Sensitivity to -38 dBm
• Dynamic range over 38 dB
• 40 ms minimum detect
• 8-pin DIP or 16-pin SOIC
• Single supply CMOS (low power)
• Supply range 2.8 to 5.5 VDC
• Inexpensive 3.58 MHz time base
• Low power consumption (<_15 mW at 3V)
Applications
• Automatic dialers
• Dialing modems
• Traffic measurement equipment
• Test equipment
• Service evaluation
• Billing systems
Pin Diagram
Description
The M-980-02 is an integrated circuit tone detector for
general purpose use in automatic following of switched
telephone calls. The circuit uses low-power CMOS
techniques to provide the complete filtering and control
required for this function. The basic timing of the M980-02 is designed to permit operation with almost any
progress tone system.
The use of integrated circuit techniques allows the
M-980-02 to pack the complete frequency and amplitude portion of call progress following into a single 8pin DIP or 16-pin SOIC. A 3.58 MHz crystal-controlled
time base guarantees accuracy and repeatability.
3V/5V operation increases customer flexibility,
improves reliability, and minimizes power consumption.
Ordering Information
Part #
M-980-02P
M-980-02S
M-980-02T
Description
8-pin plastic DIP
16-pin SOIC
16-pin SOIC, Tape and Reel
Block Diagram
DS-M980-02-R3
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1
M-980-02
Absolute Maximum Ratings
DC Supply Voltage (VDD - VSS)
6.0V
Voltage on SIGNAL IN(VDD+ 0.5V) to (VSS-12V)
Voltage on Any Pin Except SIGNAL IN
(VDD + 0.5V) to VSS -0.5V
Storage Temperature Range
-65° to 150°C
Operating Temperature
-40°C to 85°C
Lead Soldering Temperature
260° for 5 seconds
Absolute Maximum Ratings are stress ratings. Stresses in
excess of these ratings can cause permanent damage to
the device. Functional operation of the device at these or
any other conditions beyond those indicated in the operational sections of this data sheet is not implied. Exposure of
the device to the absolute maximum ratings for an extended period may degrade the device and effect its reliability.
Note:
Exceeding these ratings may permanently damage the M-980-02.
Specifications
Parameter
Supply Current
Signal Detection
Signal Rejection
Level (5V)
Level (3V)
Duration
Level
Quiet Interval Detect
Duration
“Detect” Output Pin
Logic 0
Logic 1
Logic 0
Logic 1
“Enable”, “XIN” Input Pin
“XIN” Duty Cycle
“XOUT” Loading
“VREF” Output Pin
“SIGIN” Input Pin
Power Consumption
Inband (5V)
Inband (3V)
Outband
Deviation
Resistance
AC + DC level
Impedance (500 Hz)
3V operation
5V operation
Min
-38
-40
40
40
85
VDD - 0.5
VSS
VDD - 0.2
40
-2
3.25
VSS - 5V
80
-
Max
5
0
0
-50
-55
0
0.5
VSS + 0.2
VDD
60
10
+2
6.75
VDD
15
25
Units
mA
dBm
dBm
ms
dBm
dBm
dBm
ms
ms
V
V
V
V
%
pF
%
kΩ
V
kΩ
mW
mW
Notes
101,2
1,2
1,3
8
9
4
4
5
5
6
7
-
Unless otherwise noted, VDD - VSS = 2.8 to 5.5 V and Ta = 25°C
Notes:
1. 0 dBm = 0.775 Vrms.
2. F = 315 to 640 Hz.
3. F > 1025 Hz, < 190 Hz.
4. Output current = 1 mA, VSS - VDD - 3.0V.
5. Input current - 10 mA max.
6. External clock.
7. Nominal = (VDD + VSS)/2.
8. Signal dropping from -38 to -65 dBm.
9. Signal dropping from -10 to -65 dBm.
Pin Description
Pin
Descriptions
SIGIN
Signal input AC or DC coupled (see level limitations elsewhere).
DETECT
Active output indicating signal detection. Activated by ENABLE.
ENABLE
Enables DETECT output. Used to mask signal activity.
VDD
Most positive power supply pin.
VREF
Internally generated reference voltage. (VSS + VDD) /2 volts.
VSS
Most negative power supply pin.
XIN, XOUT
Crystal attachment pins. XIN may be used as the input for an external 3.58 MHz clock.
2
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Rev. 3
M-980-02
Signal Timing
Call Progress Tone Detection
Call progress tones are audible tones sent from switching systems to calling parties to show the status of
calls. Calling parties can identify the success of a call
placed by what is heard after dialing. The type of tone
used and its timing vary from system to system, and
though intended for human ears these signals can provide valuable information for automated calling systems.
The M-980-02 is a signal detector sensitive to the frequencies most often used for these progress tones.
Electronic equipment monitoring the DETECT output
of the M-980-02 can determine the nature of signals
present by measuring their duty cycle. See Figure 4 for
a diagram of a circuit that could be used to permit a
microcomputer to directly monitor tones on the telephone line. Much of the character of the progress
tones is in their duty cycle or cadence (sometimes
referred to as interruption rate). This information, coupled with level and frequency indication from the M980-02, can be used to decide what progress tones
have been encountered.
Table 5 shows some call progress tones with on/off
times; 0.25/0.25 being 250 ms on, 250 ms off on a
repeating basis. For example, dial tones as shown in
the table are usually “on” continuously and last until the
first dial digit is received by the switching system. Line
Busy, on the other hand, is turned off and on at a rate
of 1 Hz with a 50% duty cycle, or an interruption rate of
60 times per minute (60 IPM). The tones can be distinguished in this way.
It should be noted that while such techniques will usually be effective, there are some circumstances in
which the M-980-02 cannot be accurately used.
Examples include situations where ringback tone may
be short or not even encountered. Ringback may be
provided at ringing voltage frequency (20 or 30 Hz)
with some harmonics and may not fall in the detect
range, and speech or other strong noise may obscure
tones making cadence measurement difficult.
Detection of “answer” is most difficult for many reasons. One way to determine if a called party has
answered is by looking for a short burst of DETECT
indications without a cadence match (produced by a
click and “hello” at the far end). Some applications will
require special methods like speech detection, but
most can be reliably handled with the M-980-02 and
simple cadence measurement.
As can be seen, the tones used for the same purposes in different systems may not be the same.
Standards do exist and should be consulted for your
particular application. In North America AT&Ts “Notes
on the Network” or EIAs RS-464 PBX standard should
be reviewed. In Europe tone plans may vary with
locale, in which case the CEPT administration in each
country must be consulted. Outside these areas,
national PTT organizations can provide information on
the systems within their borders.
Device Timing
Time
tMD
tID
tB
Value
40 ms
40 ms @ -38 dBm
85 ms @ -10 dBm
18 ms
Significance
A valid tone will always be detected if it is at least 40 ms long.
Inter-tone gaps must be detected if greater than this duration.
Drop-outs of valid tone of up to 18 ms will be ignored.
Note:
Application or removal of high level signals outside the must detect range may cause momentary detection, which may be filtered by time guarding the output.
Rev. 3
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3
M-980-02
Call Progress Tones
Frequency 1
350
425
600
400
480
600
480
600
440
500
440
Frequency 2
+440
X 120
+620
X 120
+620
X 120
+ 480
X 40
-
On/Off
Continuous
0.5/0.5s
0.25/0.25s
2.0/4.0s
0.5s burst
Use
Dial tones
Line Busy Tones
Reorder Tones
Audible Ringing
Various
Telephone Line Circuit Application
Detect Range
4
Input Signal Configuration
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Rev. 3
M-980-02
Mechanical Dimensions
Tolerances
Inches
A
A1
b
b2
C
D
E
E1
e
ec
L
Min
.015
.014
.045
.008
.355
.300
.240
Max
.210
.022
.070
.014
.400
.325
.280
.100 BSC
0°
.115
15°
.150
Metric (mm)
Min
Max
5.33
.38
.36
.56
1.1
1.8
.20
.36
9.02
10.16
7.6
8.3
6.1
7.1
2.54 BSC
0°
15°
2.9
4.1
Tolerances
Inches
A
A1
b
D
E
e
H
L
Min
Max
.0926
.1043
.0040
.0118
.013
.020
.3977
.4133
.2914
.2992
.050 BSC
.394
.419
.016
.050
Metric (mm)
Min
Max
2.35
2.65
.10
.30
.33
.51
10.10
10.50
7.4
7.6
1.27 BSC
10.00
10.65
.40
1.27
Dimensions
mm
(inches)
Rev. 3
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5
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Clare, Inc. makes no representations or warranties with respect to
the accuracy or completeness of the contents of this publication
and reserves the right to make changes to specifications and
product descriptions at any time without notice. Neither circuit
patent licenses nor indemnity are expressed or implied. Except as
set forth in Clare’s Standard Terms and Conditions of Sale, Clare,
Inc. assumes no liability whatsoever, and disclaims any express or
implied warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement of any intellectual property right.
The products described in this document are not designed,
intended, authorized or warranted for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or where malfunction
of Clare’s product may result in direct physical harm, injury, or
death to a person or severe property or environmental damage.
Clare, Inc. reserves the right to discontinue or make changes to its
products at any time without notice.
Specification: DS-M980-02-R3
©Copyright 2001, Clare, Inc.
All rights reserved. Printed in USA.
7/20/01
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