Datasheet M-985-01T, M-985-01S, M-985-01P Datasheet (CLARE)

Part # Description

M-985-01P 22-pin plastic DIP
M-985-01S 20-pin plastic SOIC
M-985-01T 20-pin plastic SOIC,Tape and Reel

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DS-M985-01-R1

M-985-01

Precise Call Progress and

Special Information Tone Generator

1

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.

Block Diagram

Pin Diagram

Ordering Information

Specifications

Parameter Conditions Min Max Units Notes

Operating V

DD

- 2.7 5.5 V -

Conditions

Power supply noise 0.1 - 5 kHz - 20 mV p-p ­Power Current drain (IDD)--15mA­V

REF

V

REF

- 48% of V

DD

52% of V

DD

V-

Impedance - 3.25 8.25 kΩ
Signal Frequency range in-band signal -1 +1 % of f

o

1

Detection, Level: V

DD

= 5.0v XRANGE = open -30 (24.5 mV) 0 (775 mV) dBm

all tones except XRANGE = V

SS

-40 (7.8 mV) -10 (245 mV) dBm

SIT tones. Level: V

DD

= 3.0V XRANGE = open -33 (17.4 mV) -3 (549 mV) dBm

XRANGE = V

SS

-43 (5.5 mV) -13 (173.5 mV) dBm

Duration (t

DD

) - 200 - ms

Signal drop out bridging time (t

BB

)- - 20ms

Level skew between adjacent for detection of both - 6 dB

inband signals

High level to low level signal for High = 0 dBm (775 mV) 1 - s

detection of both (t

IL

) Low = -30 dBm (24.5 mV)

Time to output (t

DO

) SIGIN ≥ -24 dBm - 200 ms

SIGIN < -24 dBm - 240 ms

Time from OUT n to STROBE (tDS)- - 10µs
Signal Detection, Frequency Range - - - - 2

940, 1400, 1800 Level: V

DD

= 5.0V XRANGE = open -30 (24.5 mV) 0 (775 mV) dBm -

Hz XRANGE = V

SS

-40 (7.8 mV) -10 (245 mv) dBm

Level: V

DD

= 3.0V XRANGE = open -33 (17.4 mV) -3 (549 mV) dBm

XRANGE = V

SS

-43 (5.5 mV) -13 (173.5 mV) dBm
Duration - 50 - ms
Signal drop out bridging time (t

BB

)- - 15ms

Signal to noise ratio - 16 - dB

Signal Rejection, Frequency range - -6 +6 % of f

0

1

all tones except Level: V

DD

= 5.0V XRANGE = open - -50 (2.5 mV) dBm -

SIT tones. XRANGE = V

SS

- -60 (0.8 mv) dBm

Level: V

DD

= 3.0V XRANGE = open - -53 (1.7 mV) dBm

XRANGE = V

SS

- -65 (.55 mV) dBm

Interval duration (t

ID

) - 160 - ms

Time to end of output (t

IO

) - - 200 ms

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2

M-985-01

Rev. 1

Absolute Maximum Ratings

Storage Temperature -40 to 150°C
Operating Ambient Temperature -40 to 85°C
V

DD

7V
Input Voltage on SIGIN VSS- 6.5 to VDD+ 0.3V
Input Voltages (except SIGIN) VSS- 0.3 to VDD+ 0.3 V
Lead Soldering Temperature 260° C for 5 seconds

Note:

Exceeding these ratings may permanently damage the M-985-01.

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.

Specifications (Continued)

Parameter Conditions Min Max Units Notes

Signal Rejection, Frequency Range - - - - 2
950, 1400, 1800 Level: V

DD

= 5.0V XRANGE = open - -40 (7.8 mV) dBm -

Hz XRANGE = V

SS

- -50 (2.5 mV) dBm -

Level: V

DD

= 3.0V XRANGE= open - -43 (5.5 mV) dBm -

XRANGE= V

SS

- -53 (1.7 mV) dBm -

Duration - 50 ms - -

Outputs OUT n, V

OL

I

SINK

= -1mA - 0.5 V -

STROBE pins V

OH

I

SOURCE

= 1mA VDD-0.5 - V -

OUT n pins I

OZ

VO=VDD, V

SS

-1µA-

Inputs EN, OE, V

IL

- - 0.5 V -

XRANGE, MODE, V

IH

VDD= 5V VDD- 2.0 - V -

PD pins V

DD

= 2.7V VDD- 0.5 - V -

Pull-up and MODE = V

SS

VDD= 5V 12.5 50 µA-

Pull-down currents V

DD

= 2.7V 4 20 µA-

/XRANGE = V

SS

-26µA-

MODE2 = V

DD

VDD= 5V 12.5 100 µA-

V

DD

= 2.7V 12.5 25 µA-

PD = V

DD

-410µA-

PD pin Pull-down current PD = V

DD

12.5 50 µA-

SIGIN pin Voltage range - -6.5 V

DD

V­Input impedance f=500 Hz 80 - kΩ -
Input spectrum - - 28 kHz -

Clock External clock V

IL

XOUT open - 0.2 V -

connected to XIN V

IH

XOUT open VDD-0.2 - V -

pin Duty cycle XOUT open 40 60 % ­XIN, XOUT with Capacitance - - 10 pF -

crystal osc. active Internal resistance - 20 - MΩ -

Power up (t

PU

) PD hi to lo - 30 ms -

X358 pin V

OL

CL= 20 pF, - 0.2 V -

I

SINK

= -1mA

V

OH

CL= 20 pF, VDD- 0.2 - V -

I

SOURCE

= 1mA

Duty cycle CL= 20 pF 40 60 % -

Tri-state t

EN

(High Z to Low Z) CL= 50 pF, - 250 ns -

Operation t

DE

(Low Z to High Z) RL= 100 kΩ - 250 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.

M-985-01

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3

Rev. 1

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.

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.

Truth Table

Signal Present (fo) Mode OUT 1 OUT 2 OUT 3 OUT 4 D425 Strobe PD OE EN

350 Hz X 1 0 0 0 X 1 0 1 1
400 Hz (Note 1) 0 0 1 0 0 X 1 0 1 1
425 Hz X X X X X 1 1 0 1 1
440 Hz X 1 1 0 0 X 1 0 1 1
480 Hz X 0 0 1 0 X 1 0 1 1
620 Hz (Note 2) 1 1 0 1 0 X 1 0 1 1
950 Hz X 0 1 1 0 X 1 0 1 1
1400 Hz X 1 1 1 0 X 1 0 1 1
1800 Hz X 0 0 0 1 X 1 0 1 1
350 & 440 Hz X 1 0 0 1 X 1 0 1 1
350 & 480 Hz X 0 1 0 1 X 1 0 1 1
350 & 620 Hz (Note 2) 1/open 1 1 0 1 X 1 0 1 1
440 & 480 Hz X 0 0 1 1 X 1 0 1 1
440 & 620 Hz (Note 2) X 1 0 1 1 X 1 0 1 1
480 & 620 Hz (Note 2) X 0 1 1 1 X 1 0 1 1
Invalid Tone Combination X 1 1 1 1 X 1 0 1 1
Other (no detect) X 0 0 0 0 0 0 0 1 1
Any X 0 0 0 0 0 0 1 1 X

Pin Functions

Pin Function

OUT 1 Active high tri-state output, per Truth Table.
OUT 2 Active high tri-state output, per Truth Table.
OUT 3 Active high tri-state output, per Truth Table
OUT 4 Active high tri-state output, per Truth Table
D425 Active high tri-state output, indicates 425 Hz detection.
EN Active high enabled, when low drives STROBE low.
OE Active high input. When low tri-states OUT n pins.
SIGIN Analog signal input (internally capacitive coupled).
STROBE Active high output, indicates valid OUT n or D425
VDD Most positive power supply input pin.
VREF Internally generated mid-power supply voltage (output)
V

SS

Most negative power supply input pin.
X358 Buffered oscillator output (3.58 MHz).
XIN Crystal oscillator or digital clock input.
XOUT 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 (V

DD

) for normal operation. Tie low or leave

open to emulate M-982 operation.

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4

M-985-01

Rev. 1

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.

Detector Frequency Windows for SIT Tones

Detector Low Reject Low Accept High Accept High Reject

D950 835 885 1016 1070
D1400 1275 1328 1472 1527
D1800 1656 1722 1854 1924

Truth Table (Continued)

Signal Present (fo) Mode OUT 1 OUT 2 OUT 3 OUT 4 D425 Strobe PD OE EN

Any X 0 0 0 0 0 0 0 1 0
Any X High Impedance X 0 0 1
Any X High Impedance 0 0 0 0
Any X High Impedance X 1 0 X

Notes:

1. This output indicates 400 Hz detect when MODE is connected to V

SS

.

2. This output indicates 620 Hz detect when MODE is open or connected to V

DD

.

M-985-01

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5

Rev. 1

SIT Timing

Call Progress Tones

Frequency (HZ)

1 2 Use

350 440 Dial Tone
400 Off Special
440 Off Alert Tone
440 480 Audible Ring
440 620 Pre-empt
480 Off Bell High Tone
480 620 Reorder (Bell Low)
350 Off Special
620 Off Special
425 Off European

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6

M-985-01

Rev. 1

Signal Timing (See Specifications)

Tri-State Timing

Power-Down Timing

Typical Application

Tolerances SAE approximation

(mm) (inches)

Min Max Min Max
A 2.35 2.65 .0926 .1043
A1 .10 .30 .0040 .0118
b .33 .51 .013 .020
D 12.60 13.00 .4961 .5118
E 7.4 7.6 .2914 .2992
e 1.27 BSC .050 BSC
H 10.00 10.65 .394 .419
L .40 1.27 .016 .050

Tolerances (inches) Metric

Approximation (mm)

Min Nom Max Min Nom Max

A .210 5.33
A1 .015 .38
b .014 .022 .36 .56
b2 .045 .060 .065 1.1 1.5 1.7
C .009 .015 .23 .38
D 1.065 1.085 1.120 27.1 27.6 28.4
E .390 .415 .425 9.9 10.5 10.8
E1 .330 .360 .390 8.4 9.1 9.9
e .100 BSC 2.54 BSC
ec 0° 15° 15° 0° 15°
L .115 .130 .160 2.9 3.3 4.1

M-985-01

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7

Rev. 1

Dimensions

mm

(inches)

MECHANICAL DIMENSIONS

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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