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M-985-01S Folha de dados(PDF) 4 Page - Clare, Inc.

Nome de Peças M-985-01S
Descrição Electrónicos  Precise Call Progress and Special Information Tone Generator
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Fabricante Electrônico  CLARE [Clare, Inc.]
Página de início  http://www.clare.com
Logo CLARE - Clare, Inc.

M-985-01S Folha de dados(HTML) 4 Page - Clare, Inc.

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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 V
SS, 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.
www.clare.com
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 switch-
ing 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 effec-
tive, there are some circumstances in which the M-985-
01 cannot be accurately used. Examples include
situations where ringback tone may be short or not
even encountered. Ringback may be provided at ring-
ing voltage frequency (20 or 30 Hz) with some harmon-
ics 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 par-
ticular 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.


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