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PDF ILF3866N Data sheet ( Hoja de datos )
| Número de pieza | ILF3866N | |
| Descripción | Subscriber Line | |
| Fabricantes | Integral | |
| Logotipo |  |
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ILF3866N
Interface Circuit of Subscriber Line ILF3866N (Interface Circuit)
(Functional Analogue – TFF3866 by Company Megaxess)
Microcircuit ILF3866N is essentially the subsriber's line
interface (SLIC).
Microcircuit ILF3866N is intended for matching the
signals of the subsriber's telephone line and the internal tract of
the analogue or analogue-digital automatic telephone station
(АТS). Microcircuit is used in the automatic telephone station. In
the analogue-digital automatic telephone stations the microcircuit
ILF3866N is used in the kit with the codek microcircuit
IL145567N (IL145567DW), IL145557DW.
Functional features of the microcircuit:
- provides power supply to the subscriber's line and the
phone set (Phone);
- performs receipt and transfer of the signals in two
directions, as well as separation of signals between the
double-wire and quadruple wire station lines;
- ensures matching of impedances;
- determines the state of stub (receiver is on hook /receiver
is off hook);
- controls application of the call signal (via the external
relay);
- performs the line testing by the leakage current to the
ground;
- performs the line protection from short circuit (heat
protection);
- has the digital port for the commands receipt from the
microcontroller;
- temperature range is from minus 40 to plus 70 С.
Application of the microcircuit ILF3866N will make it
possible to reduce power consumption, dimensions and cost of
the telephone station, enhance quality and reliability of the phone
communication.
By design the microcircuit is made in the plastic twenty
two pin DIP package MS-010AА.
INTEGRAL
1
1 page  
ILF3866N
Electric Parameters
Parameter
Description, Symbol
Measurement Unit
Measurement Mode
Norm
Min Max
Overload level 1), %
Longitudinal balance from double
wire to quadruple wire line, dB
Harmonics ratio from double wire
to quadruple wire port, dB
Double Line Port (Fig. 3, 4)
КTRO
BLFE
RL = 600 Оhm,
f = 1 kHz, VTR=2.19 V
f = 1 kHz
КГ24
BLFE = 20 lg ELO/VTX
-
-
55
46
-
Overload level2), %
Quadruple wire transmitting port (VTX) (Fig. 5, 6)
KTXO
Load resistance is over
20 kOhm, f = 1 kHz,
-
VTX=2.19 V
Quadruple wire liongitudinal BFLE f = 1 kHz
balance, dB
BFLE = 20 lg VRX/VLO,
50
45
Internal losses (Fig. 7)
Transmission ratio from double
wire to quadruple wire line 3), 4),
G24
VTR = 0dBm, f =1 kHz,
G24 = 20 lg(VTX/VTR)
dB
-0.15
-0.20
Transmission
ratio
from G42 VRX = 0dBm, f =1 kHz,
quadruple wire to double wire line
3), 4), dB
G42 = 20 lg(VTR/VRX)
-0.15
-0.20
Transmission
ratio
from G44 VRX = 0dBm, f =1 kHz,
quadruple wire to quadruple wire
line3), 4), dB
G44 = 20 lg(VTX/VRX)
-0.15
-0.20
Battery power supply
Line current in active mode, mА
ILA ILA=50/ RL+(RDC1 +
27.4
+ RDC2)/50
RL=600 Оhm,
RDC1=RDC2=41 kOhm,
26.0
VBat = -60 V, VС1 = VIL,
VС2 = VIH
Line current in the stand-by ILS ILS=(VBat–3)/(RL+1800
19.9
mode, mА
Оhm)
VС1 = VIH, VС2 = VIL
VBat = -60 V,
RL = 600 Оhm
Line current sensor
17.6
Switch-on threshold current of line
current sensor, mА
ILThOn
RD = 48.7 kOhm
between inputs TIPX and
8.25
Switch-off threshold current of line
current sensor, mА
ILThOff
RINGX D.C. oscillator is
switched on IL
RD = 48.7 kOhm
7.5
7.2
6.5
Leakage to ground sensor
Switch-on current of leakage to
ground sensor, mА
ILOn D. C. oscillator is
connected
between
9.0
ground and inputs TIPX
or RINGX
8.0
Switch-off current of leakage to
ground sensor, mА,
ILOff
-
4.0
3.0
Current hysteresis of leakage to
ground sensor, mА
ILGK
ILOn - ILOff
3.0
0
0.8
-
-
-54
-53
0.8
-
-
0.15
0.20
0.15
0.20
0.15
0.20
33.6
35.0
27.6
29.6
10.7
11.5
9.4
10.2
16.0
17.0
11.0
12.0
8.0
9.0
Ambient
Tempera-
ture, С
25 10
25 10
-40; 70
25 10
-40; 70
25 10
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
25 10
-40; 70
INTEGRAL
5
5 Page 
ILF3866N
when it is used with the programmed codek-filters. Programmed codek-filter makes it
possible for the system controller to select the hybrid balance for matching the various
line impedances without the circuit revision. In addition to this the gain ratios can be
adjusted in transfer and receipt. Hybrid function can also be realized with application of
the vacant amplifier in combinations with the regular codek-filter (Figure 9). Via
impedance ZB the current, proportional to VRX, is injected to the summing-up node. From
expression (11) for the gain ratio G44, proportionate to VRX voltage is reversed to VTX.
This voltage is converted by means of the resistor RTX to the current, flowing to the
same summing node. These currents can be surpressed, considering
VTX
VRX
+
VRX
ZB
= 0 (EL = 0) .
(11)
Gain ratio G44 includes the required phase shift and thus the balance circuit ZB can
be computed by the formula
ZB
=
−R TX
⋅
VRX
VTX
=
R TX
⋅
Z RX
ZT
⋅
ZT
/ 1000 + 2RF
2RF + ZL
+ ZL
.
(12)
For instance: computation of the resistor RB for matching the line by the
microcircuit application pattern, indicated in Figure 14
RB
=
20 ⋅103
⋅
261
523
⋅10
⋅10
3
3
⋅
523
⋅103
/1000 +
600 + 2 ⋅
2 ⋅ 40
40
+
600
= 17.66
kОhm
(i. e. standard rated nominal value 17.8 kОhm ± 1%).
RFB
VTX
21
RTX
ILF3866N
ZT
19
RSN
ZRX
-+
VT
ZB Codec Filter
conbination
VRX
Figure 9 – Hybrid circuit (anti local effect)
INTEGRAL
11
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet ILF3866N.PDF ] | |
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