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M-985-01T Arkusz danych(PDF) 3 Page - Clare, Inc.

Numer części M-985-01T
Szczegółowy opis  Precise Call Progress and Special Information Tone Generator
Download  8 Pages
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Producent  CLARE [Clare, Inc.]
Strona internetowa  http://www.clare.com
Logo CLARE - Clare, Inc.

M-985-01T Arkusz danych(HTML) 3 Page - Clare, Inc.

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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
V
DD -0.5
-
V
-
OUT n pins
I
OZ
V
O=VDD, VSS
-1
µA-
Inputs
EN, OE,
V
IL
-
-
0.5
V
-
XRANGE, MODE,
V
IH
V
DD = 5V
V
DD - 2.0
-
V
-
PD pins
V
DD = 2.7V
V
DD - 0.5
-
V
-
Pull-up and
MODE = V
SS
V
DD = 5V
12.5
50
µA-
Pull-down currents
V
DD = 2.7V
4
20
µA-
/XRANGE = V
SS
-2
6
µA-
MODE2 = V
DD
V
DD = 5V
12.5
100
µA-
V
DD = 2.7V
12.5
25
µA-
PD = V
DD
-4
10
µA-
PD pin
Pull-down current
PD = V
DD
12.5
50
µA-
SIGIN pin
Voltage range
-
-6.5
V
DD
V-
Input impedance
f=500 Hz
80
-
k
-
Input spectrum
-
-
28
kHz
-
Clock
External clock
V
IL
XOUT open
-
0.2
V
-
connected to XIN V
IH
XOUT open
V
DD-0.2
-
V
-
pin
Duty cycle
XOUT open
40
60
%
-
XIN, XOUT with
Capacitance
-
-
10
pF
-
crystal osc. active Internal resistance
-
20
-
M
-
Power up (t
PU)
PD hi to lo
-
30
ms
-
X358 pin
V
OL
C
L = 20 pF,
-
0.2
V
-
I
SINK = -1mA
V
OH
C
L = 20 pF,
V
DD - 0.2
-
V
-
I
SOURCE = 1mA
Duty cycle
C
L = 20 pF
40
60
%
-
Tri-state
t
EN (High Z to Low Z)
C
L = 50 pF,
-
250
ns
-
Operation
t
DE (Low Z to High Z)
R
L = 100 kΩ
-
250
ns
Unless otherwise noted, V
DD - 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
www.clare.com
3
Rev. 1
Call Progress Tone Detection
Call progress tones are audible tones sent from switch-
ing 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 pres-
ent 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 (some-
times referred to as interruption rate). This information,
coupled with level and frequency indication from the M-
985-01, can be used to decide what progress tones
have been encountered.


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