TECHNICAL DATA
MULTISTANDARD CMOS IC OF SINGLE CHIP PHONE WITH
DOUBLE SOFT LIMITATION
Description
IL2533N, IL2533D is CMOS IC, supporting all functions, necessary for design of electronic
telephone with high characteristics. Standard application circuit is shown at figure 2.
Device includes LD/MF constant automatic dialer, melodies generation, ring frequency
identification and high quality circuit for line/speech.
RAM at chip, intended for redialing of 31-digit number and memory elements, containing upto 21
symbols/data. Floating marker method enables to use LNR function under control of different
РАВХ systems. Device contains volume control of hearing aid. Volume is controlled by VOL button
(5.4dB) or "–/+" button (plus 8.1/minus 5.4dB in 5 levels).
Main features
LS
MFL
RO
01
02
03
04
05
06
07
08
09
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RI
─
Line/speech circuit. LD/MF constant automatic dialer
and tone ring at one 28-pin CMOS chip.
Operational range 13 to 100 mА (decreasing upto 5 mА
causes productivity deterioration).
LI
VSS
CS
M2
M1
LED
FCI
R1
─
VDD
AGND
STB
─
─
─
─
─
─
─
─
─
─
─
─
Soft limitation for elimination of drastic distortion.
Controlling of received signal volume.
Automatic line loss compensation.
Low noise level (max – 72 dBmp).
Actual or complex impedance.
Switching LD/MF dialing.
Tone damper during programming.
Redial of the last 31 digit number.
CI
LO
LCC
HS/DP
OSC
MODE
C4
R2
R3
Reference storage.
R4
Redial of busy line or previous connection.
Pause button for applying to pause or waiting function.
3 pulse flashes: buttons, “R1”–100 ms, “R2” – 280 ms
and “R3” – 375/600 ms.
C1
C2
C3
package pin out
─
─
─
Active RC-filter on chip.
Circuit of ring frequency determination.
Three-tone melody generator
PACKAGE
IL2533D assembly to 28-pin SO-package
MS-013AE.
IL2533N assembly to 28-pin DIP-package
MS-011AB.
1
INTEGRAL [ INTEGRAL CORP. ]
