CLARE M-985-01S Precise call progress and special information tone generator Datasheet

M-985-01
Precise Call Progress and
Special Information Tone Generator
Features
•
•
•
•
•
•
•
•
•
•
Precise detection of call progress tones
Linear (analog) input
Digital (CMOS compatible), tri-state outputs
22-pin DIP and 20-pin SOIC
Single supply 3 to 5 volt (low power CMOS)
Inexpensive 3.58 MHz crystal time base
Wide dynamic range (30 dB)
Lower power consumption (power-down mode)
425 Hz detection
Special Information Tone (SIT) Detection
Applications
• Automatic dialers
• Dialing modems
• Traffic measurement equipment
• Test equipment
• Service evaluation
• Billing systems
Description
The M-985-01 is an integrated circuit precise tone
detector for call progress and special information
tones (SIT), as defined by CCITT.
The use of integrated circuit techniques allows the
M-985-01 to pack the eight filters for call progress
detection into a single 22-pin DIP or a 20-pin SOIC. A
3.58 MHz crystal-controlled time base guarantees
accuracy and repeatability.
The M-985-01 combines the call progress detection of
the M-982-02 and the SIT detection of the M-984-02.
It has an operating voltage range down to 3V. It has
low power consumption under normal operating conditions. A power down (PD) feature is provided to further reduce power consumption when inactive.
Ordering Information
Part #
Description
M-985-01P
M-985-01S
M-985-01T
22-pin plastic DIP
20-pin plastic SOIC
20-pin plastic SOIC,Tape and Reel
Pin Diagram
Block Diagram
DS-M985-01-R1
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1
M-985-01
Absolute Maximum Ratings
Storage Temperature
Operating Ambient Temperature
VDD
Input Voltage on SIGIN
Input Voltages (except SIGIN)
Lead Soldering Temperature
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.
-40 to 150°C
-40 to 85°C
7V
VSS - 6.5 to VDD + 0.3V
VSS - 0.3 to VDD + 0.3 V
260° C for 5 seconds
Note:
Exceeding these ratings may permanently damage the M-985-01.
Specifications
Operating
Conditions
Power
VREF
Signal
Detection,
all tones except
SIT tones.
Parameter
Conditions
-
Min
2.7
Max
5.5
Units
V
Notes
-
Power supply noise
Current drain (IDD)
VREF
Impedance
Frequency range
Level: VDD = 5.0v
0.1 - 5 kHz
in-band signal
XRANGE = open
XRANGE = VSS
XRANGE = open
XRANGE = VSS
for detection of both
48% of VDD
3.25
-1
-30 (24.5 mV)
-40 (7.8 mV)
-33 (17.4 mV)
-43 (5.5 mV)
200
-
20
15
52% of VDD
8.25
+1
0 (775 mV)
-10 (245 mV)
-3 (549 mV)
-13 (173.5 mV)
20
6
mV p-p
mA
V
kΩ
% of fo
dBm
dBm
dBm
dBm
ms
ms
dB
-
-
s
200
240
10
0 (775 mV)
-10 (245 mv)
-3 (549 mV)
-13 (173.5 mV)
15
+6
-50 (2.5 mV)
-60 (0.8 mv)
-53 (1.7 mV)
-65 (.55 mV)
200
ms
ms
µs
dBm
dBm
dBm
dBm
ms
ms
dB
% of f0
dBm
dBm
dBm
dBm
ms
ms
VDD
Level: VDD = 3.0V
Duration (tDD)
Signal drop out bridging time (tBB)
Level skew between adjacent
inband signals
High level to low level signal for
detection of both (tIL)
Time to output (tDO)
Time from OUT n to STROBE (tDS)
Signal Detection, Frequency Range
940, 1400, 1800 Level: VDD = 5.0V
Hz
Level: VDD = 3.0V
Duration
Signal drop out bridging time (tBB)
Signal to noise ratio
Signal Rejection, Frequency range
all tones except Level: VDD = 5.0V
SIT tones.
Level: VDD = 3.0V
Interval duration (tID)
Time to end of output (tIO)
2
High = 0 dBm (775 mV)
1
Low = -30 dBm (24.5 mV)
SIGIN ≥ -24 dBm
SIGIN < -24 dBm
XRANGE = open
-30 (24.5 mV)
XRANGE = VSS
-40 (7.8 mV)
XRANGE = open
-33 (17.4 mV)
XRANGE = VSS
-43 (5.5 mV)
50
16
-6
XRANGE = open
XRANGE = VSS
XRANGE = open
XRANGE = VSS
160
-
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1
2
-
1
-
Rev. 1
M-985-01
Specifications (Continued)
Parameter
Signal Rejection, Frequency Range
950, 1400, 1800 Level: VDD = 5.0V
Hz
Level: VDD = 3.0V
Outputs
Inputs
Duration
OUT n,
STROBE pins
OUT n pins
EN, OE,
XRANGE, MODE,
PD pins
Pull-up and
Pull-down currents
VOL
VOH
IOZ
VIL
VIH
MODE = VSS
/XRANGE = VSS
MODE2 = VDD
PD = VDD
Pull-down current
Voltage range
Input impedance
Input spectrum
External clock
VIL
connected to XIN VIH
pin
Duty cycle
XIN, XOUT with Capacitance
crystal osc. active Internal resistance
Power up (tPU)
X358 pin
VOL
PD pin
SIGIN pin
Clock
VOH
Tri-state
Operation
Duty cycle
tEN (High Z to Low Z)
tDE (Low Z to High Z)
Conditions
XRANGE = open
XRANGE = VSS
XRANGE= open
XRANGE= VSS
ISINK = -1mA
ISOURCE = 1mA
VO=VDD, VSS
VDD = 5V
VDD = 2.7V
VDD = 5V
VDD = 2.7V
VDD = 5V
VDD = 2.7V
PD = VDD
f=500 Hz
XOUT open
XOUT open
XOUT open
PD hi to lo
CL = 20 pF,
ISINK = -1mA
CL = 20 pF,
ISOURCE = 1mA
CL = 20 pF
CL = 50 pF,
RL = 100 kΩ
Min
50
VDD -0.5
VDD - 2.0
VDD - 0.5
12.5
4
2
12.5
12.5
4
12.5
-6.5
80
VDD-0.2
40
20
-
Max
-40 (7.8 mV)
-50 (2.5 mV)
-43 (5.5 mV)
-53 (1.7 mV)
ms
0.5
1
0.5
50
20
6
100
25
10
50
VDD
28
0.2
60
10
30
0.2
Units
dBm
dBm
dBm
dBm
V
V
µA
V
V
V
µA
µA
µA
µA
µA
µA
µA
V
kΩ
kHz
V
V
%
pF
MΩ
ms
V
Notes
2
-
VDD - 0.2
-
V
-
40
-
60
250
250
%
ns
ns
-
Unless otherwise noted, VDD - VSS = 5V, Ta = 25°C, PD at logical low state, and XRANGE at a logical high state. Power levels are in dBm referenced to 600 ohm. DC voltages are referenced to VSS.
Notes:
1. Per tone.
2. See Table 4 for detection/rejection frequencies.
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-985-01 contains five signal detectors sensitive to
the frequencies often used for these progress tones.
Rev. 1
Electronic equipment monitoring the OUTn outputs of
the M-985-01 can determine the nature of signals present by measuring their duty cycle. See Mechanical
Dimensions 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 M985-01, can be used to decide what progress tones
have been encountered.
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3
M-985-01
Pin Functions
Pin
OUT 1
OUT 2
OUT 3
OUT 4
D425
EN
OE
SIGIN
STROBE
VDD
VREF
VSS
X358
XIN
XOUT
Function
Active high tri-state output, per Truth Table.
Active high tri-state output, per Truth Table.
Active high tri-state output, per Truth Table
Active high tri-state output, per Truth Table
Active high tri-state output, indicates 425 Hz detection.
Active high enabled, when low drives STROBE low.
Active high input. When low tri-states OUT n pins.
Analog signal input (internally capacitive coupled).
Active high output, indicates valid OUT n or D425
Most positive power supply input pin.
Internally generated mid-power supply voltage (output)
Most negative power supply input pin.
Buffered oscillator output (3.58 MHz).
Crystal oscillator or digital clock input.
Crystal oscillator output. Used only with a crystal. Use
X358 when clock output signal is required.
XRANGE Active low input. Adds 10 dB of gain to input stage.
MODE
Selects 400/620 Hz detector frequency, 400 Hz when
connected to VSS, 620 Hz when open.
PD
Power down operation, logic high inhibits internal
clock. Internal pulldown resistor.
MODE2 Tie high (VDD) for normal operation. Tie low or leave
open to emulate M-982 operation.
For example, dial tones shown in absolute Maximum
Ratings Table on page 3, 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-98501 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.
Standards exist and should be consulted for your particular application. In North America AT&Ts “Notes on
the Network” or EIA’s 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.
Truth Table
Signal Present (fo)
350 Hz
400 Hz (Note 1)
425 Hz
440 Hz
480 Hz
620 Hz (Note 2)
950 Hz
1400 Hz
1800 Hz
350 & 440 Hz
350 & 480 Hz
350 & 620 Hz (Note 2)
440 & 480 Hz
440 & 620 Hz (Note 2)
480 & 620 Hz (Note 2)
Invalid Tone Combination
Other (no detect)
Any
4
Mode
X
0
X
X
X
1
X
X
X
X
X
1/open
X
X
X
X
X
X
OUT 1
1
0
X
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
OUT 2
0
1
X
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
OUT 3
0
0
X
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
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OUT 4
0
0
X
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
D425
X
X
1
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
Strobe
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
PD
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
OE
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
EN
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
X
Rev. 1
M-985-01
Truth Table (Continued)
Signal Present (fo)
Any
Any
Any
Any
Mode
X
X
X
X
OUT 1
0
OUT 2 OUT 3
OUT 4
0
0
0
High Impedance
High Impedance
High Impedance
D425
0
Strobe
0
X
0
X
PD
0
0
0
1
OE
1
0
0
0
EN
0
1
0
X
Notes:
1. This output indicates 400 Hz detect when MODE is connected to VSS.
2. This output indicates 620 Hz detect when MODE is open or connected to VDD.
Detector Frequency Windows for SIT Tones
Detector
D950
D1400
D1800
Low Reject
835
1275
1656
Low Accept
885
1328
1722
High Accept
1016
1472
1854
High Reject
1070
1527
1924
Call Progress Tones
Frequency (HZ)
1
2
350
440
400
Off
440
Off
440
480
440
620
480
Off
480
620
350
Off
620
Off
425
Off
Use
Dial Tone
Special
Alert Tone
Audible Ring
Pre-empt
Bell High Tone
Reorder (Bell Low)
Special
Special
European
SIT Timing
Rev. 1
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5
M-985-01
Signal Timing (See Specifications)
Tri-State Timing
Power-Down Timing
Typical Application
6
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Rev. 1
M-985-01
MECHANICAL DIMENSIONS
Tolerances (inches)
Min
A
A1
b
b2
C
D
E
E1
e
ec
L
A
A1
b
D
E
e
H
L
Nom
Max
.210
.015
.014
.022
.045 .060 .065
.009
.015
1.065 1.085 1.120
.390 .415 .425
.330 .360 .390
.100 BSC
0°
15°
15°
.115 .130 .160
Tolerances
(mm)
Min
Max
2.35
2.65
.10
.30
.33
.51
12.60
13.00
7.4
7.6
1.27 BSC
10.00
10.65
.40
1.27
Metric
Approximation (mm)
Min Nom Max
5.33
.38
.36
.56
1.1
1.5
1.7
.23
.38
27.1 27.6 28.4
9.9
10.5 10.8
8.4
9.1
9.9
2.54 BSC
0°
15°
2.9
3.3
4.1
SAE approximation
(inches)
Min
Max
.0926
.1043
.0040
.0118
.013
.020
.4961
.5118
.2914
.2992
.050 BSC
.394
.419
.016
.050
Dimensions
mm
(inches)
Rev. 1
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Tel: 1-314-770-1832
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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-M985-01-R1
©Copyright 2001, Clare, Inc.
All rights reserved. Printed in USA.
7/24/01
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