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PDF TEA1083AT Data sheet ( Hoja de datos )
| Número de pieza | TEA1083AT | |
| Descripción | Call progress monitor for line powered telephone sets | |
| Fabricantes | NXP Semiconductors | |
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INTEGRATED CIRCUITS
DATA SHEET
TEA1083; TEA1083A
Call progress monitor for line
powered telephone sets
Product specification
File under Integrated circuits, IC03A
March 1994
1 page  
Philips Semiconductors
Call progress monitor for line powered
telephone sets
Product specification
TEA1083; TEA1083A
Table 1 Comparison of the TEA108X family.
PRODUCT
Application area
PD facility
MUTE or LSE facility
Dynamic limiter
Howling limiter
VBB setting
SEL
BTL
Number of pins
CONDITIONS
note 1
note 2
note 3
note 3
note 4
TEA1083
TEA1083A
call progress monitoring
−X
XX
−−
−−
−−
XX
−−
8 16
TEA1085/85A
listening-in
X
X
X
X
X
X
X
24
Notes
1. A call progress monitor is recommended by the
European Telecommunications Standards Institute
(ETSI) for telephone sets with automatic on-hook
dialling facilities so that audible, or visual, progress of
a call attempt can be monitored. In accordance with
the ETSI (at a frequency of 440 Hz and a line level of
20 dBm (600 Ω)), a minimum level of 50 dBA shall be
guaranteed at a distance of 50 cm from the set. This
corresponds to a minimum level of approximately
100 mV (RMS) (PO ≥ 0.2 mW) across a loudspeaker;
Philips type AD2071/Z50.
A listening-in set has to offer the user more facilities
e.g. howling limiting to reduce annoying loudspeaker
and line signals. Dynamic limiting of the loudspeaker
signal, with respect to supply conditions, can also be
required. Acoustic output levels for listening-in sets are
approximately 70 to 75 dBA. This corresponds to a
loudspeaker level of approximately 1 mV (RMS)
(PO ≈ 20 mW).
2. The MUTE function of the TEA1085A has a logic input;
the MUTE function of the TEA1085 has a toggle input.
3. SEL: loudspeaker connected in a single-ended-load
configuration
BTL: loudspeaker connected in a bridge-tied-load
configuration
4. Consult the product specification for the package
outline/s.
FUNCTIONAL DESCRIPTION
The TEA1083/83A is normally used in conjunction with a
transmission circuit of the TEA1060 family. The circuit
must be connected between the positive line terminal
(pin 2) and pin SLPE of the transmission IC. The
transmission characteristics (impedance, gain settings,
etc.) are not affected.
An interconnection between the TEA1083/83A and a
member of the TEA1060 family is illustrated in Fig.5.
Supplies SUP, SREF, VBB and VSS
In Fig.6 the line current is divided into ITR for the
transmission IC and ISUP for the monitoring circuit
TEA1083/83A.
ITR is constant:
ITR = Vint / R20
ISUP = Iline − ICC − ITR
Where:
• Vint is an internal temperature compensated reference
voltage of 500 mV (typ) between pins SUP and SREF
• R20 is a resistor connected between SUP and SREF
• ICC is the internal current consumption of the TEA106X
(approximately 1 mA).
A practical value for resistor R20 is 150 Ω; this produces a
current of approximately 3.3 mA (typ) for ITR and ISUP is
approximately equal to Iline − 4.3 mA.
March 1994
5
5 Page 
Philips Semiconductors
Call progress monitor for line powered
telephone sets
Product specification
TEA1083; TEA1083A
SYMBOL
PARAMETER
CONDITIONS
LSE input
VIL
VIH
II
∆G
LOW level input voltage
HIGH level input voltage
Input current
LSE = HIGH
Reduction of gain from LSI1/LSI2 LSE = LOW
to QLS
MIN.
TYP.
MAX. UNIT
0−
1.5 −
−5
60 80
0.3 V
VBB V
10 µA
− dB
handbook, full pagewidth
Iin
VSUP
ISUP
A
ICC
R1
620 Ω
ITR
R20
150 Ω
VSUP − VSREF
15
VCC
2
GAS1
1
LN
7
MIC−
VCC
3 (4) 2 (2) 8 (16)
SREF SUP
(13) 6
LSE
VBB
7 (15)
QLS
IBB
3
GAS2
8
MIC+
VCC
(12)
PD
TEA1083
C21
220 C20
Iline 5 TEA1060
QR+
(8) 4 (TEA1083A)
LSI1
µF VBB
470
µF
VLSI
VO
6 (9) 5
GAR
VEE STAB REG SLPE
LSI2
VSS
1 (1)
RLS
50 Ω
10 9
16 18
C1
100
µF
R5
3.6
kΩ
C3
4.7
µF
R9
20 Ω
MGR054
Fig.10 Test circuit.
Notes to figure 10
1. ISUP = IIN − ITR
2. Gv = 20 log V---V--L--o-S---I
3.
ITR
=
-V----S---U----P----–---S----R---E----F-
R 20
4. The pin numbers in parenthesis refer to the TEA1083A/AT
5. LSE has to be HIGH to measure the voltage gain
6. PD has to be HIGH to measure in PD conditions
7. The pins not shown in the TEA1060 are left open-circuit
8. An impedance in series with pin SUP (e.g. an ammeter) should
be avoided as it interferes with the values of ITR and ISUP.
March 1994
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet TEA1083AT.PDF ] | |
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