Document
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
HPR 01
RD 02 DT 03 DR 04
TIPX 05
RINGX 06
BGND 07
BGND 08
RINGRLY 09
VBat
10
RSG 11
22 HPT 21 VTX 20 VEE 19 RSN 18 AGND 17 RDC 16 С1 15 С2
14 DET 13 E0 12 E1
ILF3866N
Рins description
Number of
Symbol
Pin
01 HPR
02 RD
03 DT
04 DR
05 TIPX
06 RINGX
07 BGND
08 Vcc
09 RINGRLY
10 VBat 11 RSG
12 E1
13 Е0
14 DET
15 С2
16 С1
17 RDC
18 AGND
19 RSN
20 VEE 21 VTX
22 HPT
Purpose
First connection pin of the AC/DC separation capacitor СНР Pin of programming resistor for determining the receiver off – hook status RD Comparator first input of subscriber's reply when calling Comparator second input of subscriber's reply when calling First input of double wire port Second input of double wire port Common pin Supply pin from the voltage source of 5 V Driver output of bell relay Pin of battery supply voltage from minus 24 to minus 75 V Pin of programming saturation resistor RSG ТТL compatible input for control of operating modes ТТL compatible input for control of operating modes Detector output
ТТL compatible input for control of operating modes ТТL compatible input for control of operating modes Output of reference voltage source (used for control of line current) Common pin Input of quadruple port Supply pin from voltage source minus 5 V Output of quadruple port Second connection pin of separation AC/DC capacitor СНР
INTEGRAL
2
Block-diagram
03
04
05 01 22 06 08 20 10 18 07
Pair line
Call replay detector
Leakage detector
Line current control
Detector of the handset
lifting Speecch
tract
ILF3866N
Ring relay driver
Control logic
09
16 15 13 12 14
17 11
02 21 19
INTEGRAL
3
Maximum and absolute maximum ratings
Mode, Parameter, Unit
Symbol
D. C. supply voltage, V Vcc relative to AGND
VEE relative to АGND VBat relative to BGND Dissipated power, Wt: – with Т 70 С
– with Т 85 С
Voltage disbalance of pin AGND relative to pin BGND, V
Relay driver:
- relay voltage, V
- relay current, mА
Call comparator:
interruption
- input voltage, V
- input voltage, mА
Digital inputs, outputs (С1, С2, Е0, Е1, DET)
- low level input voltage, V
- high level input voltage, V
- output voltage, V
Vcc VEE VBat РD
VG
VRRly IRRly
VDT, VDR IDT, IDR
VIL VIH VO
maximum ratings
Min Max
-4.75 -5.25 -75*
-
-0.2
VBat -25
5.25 -4.75 -24
1.5 1.1
0.2
Vcc 0
VBat
0
-4 4
0 0.8 2.0 Vcc
0 Vcc
- output current, mА
Subscriber's signal port:
current by pin TIPX RINGX, mА
or
IO IRT
-5 - 50
Storage temperature, С Tstg -
-
Chip storage temperature, С
Tj
- 140
___________
* Minus 75 C within not over 30 minutes, minus 72 C — constantly
ILF3866N
absolute maximum ratings
Min. Max
-0.5 7.0
-7.0 0.5
-100
VEE
- 1.7 1.5
-0.3 0.3
VBat Vcc -30 0
VBat
0
-5 5
Vcc + 0. -0.3 3
-0.3
Vcc + 0. 3
-0.3
Vcc + 0. 3
-6
- 70
-60 125 - 150
INTEGRAL
4
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 k.