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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 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 Line/speech circuit. LD/MF constant automatic dialer and tone ring at one 28-pin CMOS chip. Operational range 13 to 100 m (decreasing upto 5 m causes productivity deterioration). 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. Reference storage. 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. Active RC-filter on chip. Circuit of ring frequency determination. Three-tone melody generator
L S MFL RO VDD AGND ST B CI L O LCC HS/DP OS C MODE C4 C3
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 L I VSS CS M2 M1 L ED FCI R1 R2 R3 R4 C1 C2
package pin out
PACKAGE IL2533D assembly to 28-pin SO-package MS-013AE. IL2533N assembly to 28-pin DIP-package MS-011AB.
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Versatility of the circuit provides possibility of variants selecting on circuits pin and several outer components. It allows adapting easily to the requirements of different standard (post, telephone and telegraph). Description of circuits pins is shown at table 1.
R2 C1
La
SA1 VD1
R1
VT2 VD5 R9 R14 C5 R12 VT4 R7 R8 R10 R6 VT3
R15 R17 C7 C6 VD6
R19
L b
C11
L1 CS
C1
LS
R1
STB
AGND
LED
C8
Adaptation to line Power supply generating Masking on direct current VDD
Line current reading
Soft encrease
RO
R20 C9
R4 VT1 VD2 R11 C4 R3 R13
VSS
Sound RAM switch off Keyboard controller
M2 M1
C10 R21
Tune generator

R1 R2 R3 R4
Ring frequency determination
Controlling logic
Clock oscillator
OSC
MFL
SA3
HS/DP
R5 VD3 C2
LLC
MODE 1 2 3 4
LLC Hi
VD4 C3
R18 AGND SA2
LLC Lo LLC Off
R16
Keyboard
VD7 VD8 VD9 VD10
Figure 2 - Typical application flow-chat
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Table 1 - Circuit pins description Pin No 01 02 03 04 05 06 07 08 09 10 11 12 Pin letter symbol LS MFL RO VDD AGND STB CI MO LLC HS/DP OSC MODE Function Line current input. Input for line current determination (responsibility setup) MF level setup. For DTMF level setup can be used potential divider, connected from this pin to AGND and to VSS Receipt output Output for controlling of dynamic hearing aid with impedance from 140 to 300 hm Positive supply voltage. Supply voltage output for circuit Analog ground, Analog ground for amplifiers Balanced input side tone. Input for side tone suppression Entire impedance output. For complex impedance, capacitor should be connected to this output Melody output. Melody generator PWM-output for tone ring. When output not active, in "Switch off" state Line waste compensation. Selected output for loss compensation in line. LLC=AGND : 20-50 m; LLC=VDD : 45-75 m; LLC=VSS :no compensation Switch hook input and output of pulse dialing. Analog input/output, establishing by high switch hooks by off-hook and open drain set it in low state during interruptions for pulse dialing and flash pulses Oscillator input. Input for ceramic resonator (3.5 Hz) Input of mode denomination selection. Function Interlocking number dialing LD mode, 10 pulse/s, 33/66ms LD mode, 10 pulse /s , 40/60ms LD mode, 20 pulse /s , 16/33ms LD mode, 20 pulse /s , 20/30ms LD mode, 10 pulse /s, 33/66ms. Temporary MF with tone on first button input "" Row 6 Only MF, 82/82ms Row 7 Only MF, 82/160ms Note - Pulse/s -- pulses per second. During temporary MF : 82/160ms 13 14 15 16 C4 C3 C2 C1 Keyboard line. (see keyboard scheme at figure 3) Mode output Open Row 1 Row 2 Row 3 Row 4 Row 5
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Table 1 continued Pin No 17 18 19 20 21 Pin letter symbol R4 R3 R2 R1 FCI Function Keyboard line. (see keyboard scheme at figure 3)
Frequency comparator input. Schmitt flip-flop input for ring frequency determination 22 LED LED output driver. Output for LED control, blinking in "Program / Mute "state 23 M1 Microphone outputs 24 M2 Differential inputs for microphone (electret type) 25 CS Input of current shunting control. Given N-channel output with open drain controls outer shunting high capacity transistor for modulation of line voltage and for line shorting during period of pulse number dialing 26 VSS Negative supply connection 27 LI Line input. Input is used for power abstraction and (adjusting) of line current 28 RI Receipt input. Input for signal received *Note - LD - pulse number dialing; *MF - frequency number dialing; *DTMF - two-frequency dialing (often case of frequence dialing)
Function selection (general table) Function Straight memory (single key) Indirect memory (two key) Redialing LNR key Insert by LNR pause key Pause key PS / key or Tone/Pulse key (/) Temporary MF key "" Automatic setup key ( - D) Volumes keys (VOL, "-/+") Volume reset by off-hook Tone ring programming Pause duration "flash" R3
4 10 yes yes yes yes / yes yes yes yes yes yes 600m
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KEYBOARD CONNECTING Keyboard connecting is shown at figure 3. Key closed, RON MAX = 1 Ohm Key opened, ROFF MIN = 1 Ohm
C1 C2 C3 C4
R1 R2 R3 R4
P/M 4 8 # LNR A RP M2
1 5 9 R1 VOL B PS M3
2 6 0 R2 + C T/P M4
3 7 * R3 D M1 MR
Figure 3 - Keyboard connecting Power-up set up On-chip voltage on preset circuit traces supply voltage V DD during receiver off-hook. When VDD increase reaches level approximately 1.2 V, preset circuit empties RAM. Direct current conditions Typical operational range is from 13 to 100 m. Operational range by lowered effectiveness is from 5 to 13 m (parallel operation). In operational range all functions are active. By line currents lower than 13 m microcircuit provides additional decrease lower than 4.5 V in order to allow parallel operation (see fig. 4). Direct current characteristic (excluding diode bridge) determining by voltage to LI and R1 resistor by line currents higher than 13 m by following form: VLS = VLI + ILINE x R1 (1). Voltage at LI is 4.5 V in typical operational range. In dialing mode, speech scheme and inactive device parts is in mode of decreased power consumption with the purpose of current saving. CS output pulls up to Vss in order to connect outer shunting transistor for supporting of low voltage at LS output within periods forming. IMPEDANCE FOR ALTERNATING CURRENT Circuit impedance on alternating current is adjusting by outer components. Impedance can be actual and complex. Alternating-current resistance ZAC, Ohm, is determining according to following form ZAC = 33 x Z1
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(2) Z1 direct current value should be 30 Ohm for maintaining of correct characteristics on direct current. Reverse damping and suppressing of side current can be set up not depending of each other.
8 (V) 6 5 4 3 2 1 0 10 20 30 40
Line current
VL S VL I
Variable signals absence
60
70
80
90 (m) 100
Figure 4 - Direct current characteristics. Dependence of potentials at LI and LS outputs from line current
SPEECH CIRCUIT Speech circuit consists of transmitting and receiving chains with double soft limitation, line attenuation compensation and side current suppression.
TRANSMITTING Amplification of transmitting chain is 37 dB for matched load line 600 Ohm from 1/2 to LS (see test circuit at figure 5). Microphone input is differential input with input resistance 20 kOhm. Soft limitation circuit limits output voltage at LI to 2 VPEAK (see figure 5). Increase front duration is 30mcs/6dB and decay front duration is 20mcs/6dB. When no-signal mode is active, during dialing or after / key pressing, amplification coefficient is reducing by more than 60 dB.
RECEIVING Amplification coefficient of receiving circuit is 3 dB for 600 Ohm of line load (test circuit at figure 5). Differential-mode signal RI and STB are receiving input. When no-signal mode is active during dialing, amplification coefficient decreases for more than 60 dB. During DIMF dialing, supporting tone is applied to the receiver. DIMF signal is supporting tone, with level lower than minus 30 dB relative to line signal. Pressing Volume key can change receiving amplification coefficient. VOL key gives raising 5.4 dB and has two-state function, i.e. repetitive key pressing sets up initial value of amplification coefficient. As alternative can be used "+/-" keys. "+"key increases coefficient by 8.1 dB in 3 levels, and "-" key decreases by 5.4 dB in 2 levels (general range 13.5 dB). Volume is set to initial value by switch hook actuation. Soft limitation circuit adjust voltage at receipt output (RO) no more than 1VPEAK (see figure 6) It prevents from sharp distortion and acoustic impact.
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SIDE TONE Good side tone suppression can be reached by using of following equal
Z BAL Z 2 = Z LINE Z1
(3).
Signal of side tone suppression is applied to STB input (see figure 8). LINE ATTENUATION COMPENSATION Line attenuation compensation is controlled by circuit output. When this mode is activated, transmission and receipt coefficient is decreasing by 6 dB by line currents from 20 to 50 m, when LLC = AGND, and by currents from 45 to 75 m, when LLC corresponds to high state (@R1=30 ). Line attenuation compensation become disconnected, when LLC corresponds to low state (see figure 7).
7
G5 SW1
330 21 10
A
1
521 (3107)
FCI LS
10
M2 G6 M1 R0 V P4 T2
3 150 23
24
P3 A
IL2533
100
T1
30 10 28 300 6 1 10 6
1 RI STB
100
47
G1 SW3
27
RL
600
10n
10V
1
660 ( 3107 )
25
S1 2 LI CS
13 14
V P1
G2
100
B 2
1 26
520 ( 3102)
"P/M" "4" "8" "#"
"1" "5" "9" "R1" "LNR" "A" "RP" "M2" "Vol" "B" "PS" "M3"
"2" "6" "0" "R2" "+" "C" "T/P" "M4"
"3" "7" "*" "R3" "-" "D" "M1" "MR"
10 10 HS/DP
SW2
VSS
10
C4 C3 C2 C1 R1 R2 R3 R4 15 16 20 19 18 17 SA1
1 2 3 4 5 6 7
G3
5
3 AGND
MFL OSC CI LLC MO 8 22 MODE 12
MULTI-STANDARD SINGLE CHIP TELEPHONE
2 100 3.58 11 7 15 9
G8 LED
VDD
22 1
1 2 3
SA2
5
4
G7 4
P2
SW4
A
G4
50 x10
IL2533
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Figure 6 - Soft limitation and distortion by receipt
1,2
AGC switching
12 VRO
Output voltage of receipt circuit (RO), VPEAK
1,0
10 9
Line current 20 m Frequency 800 Hz
7 6 5
0,6
0,4
Distortion
4 3
0,2
2 1
0 0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00
0
Input line voltage (LS), VPEAK
(dB ) 35 34 33 32 31 30 29
Tx
LLC = A GND f = 800 Hz ZLINE = 600 Ohm VLS = -10 dBm 20 30 40 50
LLC = VDD
LLC = VSS
Distortion
0,8
8
Current of line 60 70 80 (mA )
Typical characteristics and line attenuation compensation for transmitting circuit
(dB )
Rx
4 3 2 1 0 -1 -2
LLC = AGND f = 800 Hz ZLINE = 600 Ohm VLS = -10 dBm 20 30 40 50
LLC = VDD
LLC = VSS
Current of line
60
70
80
(mA )
Typical characteristics and line attenuation compensation for receiving circuit
Figure 7 - Typical characteristics and line attenuation compensation
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ZIN
Z1
ZBAL
Z2
Figure 8 - Side Tone Balance DIALING FUNCTION DIGITAL KEYS Key scanning is allowed, when HS/DPN is set up as high and VDD is higher than VREF. A valid key is detected from the keyboard by connecting the appropriate row to the column (RON < 1 ). It can be done using keyboard matrix N x M with single contacts. Four diodes are used for lines quantity extension (see keyboard connecting at figure 3.). Also it is possible to connect microcontroller to lines and columns. P/M KEY / key is used for entry into the program/no-signal state. Pressing / key disconnects speech circuit and device is set to program state. Repetitive pressing of P/M key disconnects nosignal mode and program state (function with two states). When program/no-signal state is activated, light-emitting indication is connected (flash: 80ms "ON" and 1s "OFF."). SELECTING OF DIALING MODE Initial mode (LD or MF) can be chosen by output mode. LD is default selection, time transfer to invoke by pressing T/P key or MF mode can be invoke by pressing T/P key or "" key (when mode input = line 5, by first pressing of "" key, MF tone generating). Circuit will revert to initial LD state after pressing of T/P key or after pressing of R (R1, R2 or R3) key or after switch arm actuation. When MF mode is selected by output mode, circuit can not be switched to LD and will stay in MF mode. AUTOMATIC SET UP KEY Letter keys allow to use easily services of interconnections automatic setup. Keys , , or D are available only in MF mode (including temporal MF) and are not saved. Pressing of one of these keys will invoke transferring of corresponding MF. Automatic set up keys are not saved to RAM, but sequentially entered signs are accumulated into FIFO buffer. Redialing of the last number (LNR) - is a possibility, that allows to transfer repetitive last hand-dialed number, without pressing the same keys. LNR can be repeated after every receiver put up. Current RAM contents is overwritten by newly entered data. Hand-entered number is automatically save to LNR RAM. RAM storage capacity is 31 digit. If dialed number is larger than 31 digit, LNR possibility will be blocked (until new data will be less than 31 digit) and further entered data will be buffered to FIFO. By PS key pressing, pauses can be put out.
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Digits, dialed later, i.e. digits entered by hand after LNR invocation, are not stored to RAM, but buffered to FIFO. REDIALING The last hand-dialed number can be redial without lever pressing, with the help of RP key. If dialed number is busy, than pressing of RP key interrupts line for 1.6 (in order to pass to new dialing) and after pause number will be repeated. Redialing function is allowed, if number was dialed before pressing RP key. It can be called unlimited times till next pressing of the lever. During 1.6-second interval, device is in lower energy consumption mode for current saving. REPEATED CALL FUNCTION Repeated call activation (R1, R2 or R3 keys) will cause flash (with periodic intervals), at that R1 flashes are never accomplished in LD mode. R2 and R3 will be implemented independently of mode. If repeated call is repeated record in digit line, it will be stored into LNR RAM, when digit (digits) are entered after repeated call. If redial key is pressed after entering of digit line into FIFO buffer with sequentially entered digit. If redial key pressing does not accompanying by digits entering, LNR RAM stays untouched. After number redialing, pause with duration 270 ms will be accomplished. Keys from 1 to 12 are keys of direct memory access, and MR key is used for abbreviated dialing. Table 2 Memory structure Number storing Keys of direct memory access Indirect memory Quantity of numbers or keys 14 4 10
Numbers can be stored to on-chip RAM. Every number can contain upto 21 digit (including pauses). During programming several pauses can be entered by PS or LNR keys pressing. Every pause, inserted within first 5 entries will be automatically limited after 2 seconds, while pauses, inserted after position 5 in the digit line will stop dialing that can be continued after PS or LNR keys pressing. "Stop" function allows dialing in PABX extension. Example - 45678-123 is stored in 1, where "-" is pause/waiting, and 123 is extension number: 1) Lift up the receiver. Wait for tone signal; 2) Press 1 (45678 will be dialed); 3) Wait for tone signal from called ; 4) Press PS or LNR (123 will be dialed). Dialing from the memory is cascade. However, one memory cell contents shall be dialed before new one can be invoked. - PAX with outcoming and incoming communication.
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FLOATING MARKER METHOD In order to accomplish simple LNR dialing after connection with Automatic telephone system Protocol of floating marker is used. If new entry coincides with contained in RAM, LNR key pressing will cause automatic dialing of rest digits. If there is inequality in coincidence, than LNR blocked till next lever pressing, and RAM will contain new number. Example - (LNR912345 contents, where 9 is access code): 1) Lift up the receiver, wait for Automatic telephone system dial tone; 2) press 9 and wait for outer dial tone; 3) Press LNR (12345 will be dialed). TONE OSCILLATOR Tone oscillator includes DTMF tones, three main frequencies for tone ring and quieting DTMF tones. DTMF oscillator provides 8 frequencies, namely: Lower Group: Sig 1-2-3- 697 Hz ns Sig 4-5-6- 770 Hz ns Sig 7-8-9852 Hz ns Sig *-0-#-D 941 Hz ns Upper Group Sig 1-4-7-* 1209 Hz ns Sig 2-5-8-0 1336 Hz ns Sig 3-6-9-# 1477 Hz ns Sig --- 1633 Hz ns D The output level of MF can be set by means of the external divider to the pin MFL. Voltage at Pin MFL (2) DTMF Level (Lower Group) 1.50 (AGND) -4.0 dBm 1.27 B -5.2 dBm 1.15 B -6.4 dBm 1.03 B -7.6 dBm 0.90 B -8.8 dBm 0.70 B -10.0 dBm 0.54 B -11.2 dBm 0.42 B -12.4 dBm 0.30 B -13.6 dBm 0.18 B -14.8 dBm 0.00 B (VSS) -16.0 dBm (ZLINE = 600 hm) The preliminary distortion constitutes 2.6 dB. MF tones comply with the recommendations of CEPT.
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Tone Ring (MELODY / LOUDNESS) The three main parts for the melodies are as follows: F1 = 800 Hz, F2 = 1067 Hz and F3 = 1333 Hz ( 5 %). Frequency of repetition and loudness of the tone melody rings can be programmed by pressing / and #, indicated with a sign in compliance with Table 4.
Table 4 SIG FREQUENCY OF REPETITION N 1 1 time (50 msec pause) 2 1 time (50 msec pause) 3 1 time (50 msec pause) 4 4 times 5 4 times 6 4 times (by default) 7 10 times 8 10 times 9 10 times 0 None
LOUDNESS -16 dB - 7 dB 0 dB (max) -16 dB - 7 dB 0 dB (max) -16 dB - 7 dB 0 dB (max) OFF
The procedure is completed by the repetitious pressing of the key /. The default setting complies with the figure 6, i.e. after the supply ON preset the device will be started with the repetition rate of 4 and the maximum loudness. If the sign 0 is programmed, then the tone ring will be disabled until the next receiver lift, when it is set for the last preset value, previous to zero. The programmed preset values are stored in RAM on the chip. The repetition frequency signifies, that the sequence from 6 frequencies is repeated 1.4 or 10 times during 1 sec. The frequency sequence is controlled by means of the sequence register as follows: Sequence F1 F2 F3 F1 F2 F3 ..... QUIETING TONE During the MF dialing the number the DIMF tones are applied to the phone speaker as a comforting tone. In the course of programming entry of the keys is indicated by means of the quieting tone of 1477 Hz. The quieting tone level constitutes approximately 60 mB at the output of RO. Duration constitutes 40 msec. After each key pressing in the program mode. When the program mode is terminated with the key /, the identification tone is applied of 140 msec. An erroneous key pressing shall cause termination of the program mode, indicated by the denial tone 4 times of 40 msec with the pauses of 28 msec between the tone enablings.
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IDENTIFICATION OF THE RING FREQUENCY The ring frequency identification block assumes, that only the signals with the frequencies between 13 and 70 Hz shall be considered as the real ringing signals. The real ringing signal identification time constitutes 1/f sec, where f is equal to the ring frequency. When the real ringing signal is continuously available during 73 msec, the melody generator is activated and remains active as long as the ring signal is available. As soon as the melody generator is started, the ring signal is continuously monitored, and the melody generator is enabled or disabled instantly in compliance with the short time availability of the correct or erroneous ring signal appropriately (until the next supply enabling or hanging up the recever).
.
SC
0 dB
26dB +
80 k STB ZBAL (10 x ZLINE)
+
8k RI 300 LI 30 ZREF
10dB +
RO
Z LINE DTMF

20 k
+
12dB 23dB + 20 k M1
ZSYN (970 )
CS
+ .
CI 32.3 x Z
REF
M2
Figure 9 - Speech circuit model by the alternating current
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LEGEND STATUSES INPUTS PROCESSING
No operation (receiver put, no
Receiver
lift-
Forced break (sec)
Speech mode
Receiver putNumber dialing (LD Key pressing Saving (storing Number entry in
Cut-off from outsiders
Programming
Processing in compliance Read-out from
Erroneous program entry
Entry in compliance
Incorrect entry
Status compliance
in with
Figure 10 - Symbols
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Figure 11 - Ring tone programming
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Figure 12 - Time MF
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Figure 13 - Storing numbers
Complex impedance (270 hm + 750 hm // 150 nF) Figure 14 - Automatic number dialing
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Those components are included only, which are required for representing the complete functions of the microcircuits. The external components can be altered for compliance with the requirements of the various national standards and for matching the various converters.
As a microcircuit is a component, but not a complete system, it cannot be applied as a separately positioned individual element on the standard basis. Consequently, the complete compliance with any standards depends upon application, where a microcircuit is used, and therefore selection of the standard application is the responsibility prerequisite of the Customer, and the manufacturer does not check the device for compliance with the concrete standards.
1 Line adaptation. Power selection. D. C. masking. 2 Line current read-out. 3 Soft limitation of the automatic gain control. 4 Melody sequence setting block. 5 Ring frequency limitation. 6 Control logic. 7 Current generator. 8 Oscilloscope. 9 RAM. Melody. Automatic number dialer. 10 Keyboard. HOD OF OPERATION PRINCIPLES OF OPERATION Methods of the microcircuit potentialities application are optimized in such a way, so as: - to comply with the expectations of the user; - to be easy for training and upgradation; - not to cause any automatic functions, which are not expected by the user - to protect the user from making the critical errors, i.. from dialing incorrect numbers, deletion of the stored numbers, etc.; - to be matching, simple and convenient in operation.
HS/DP
tIDP
tPDP
tB
tM
tB
tM
tIDP
tPDP
tB
tM
Figure 15 - Time chart of the number dialing
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IL2533
MUTE MASK HS/DPN
tIDP
tPDP
tB
tM
tB
tM
tAP
tIDP
tPDP
tB
tM
Figure 16 - Time chart of the LD number dialing with the access pause
MUTE MASK HS/DPN
TONE tIDP tIDP tAP tIDP
Figure 17 - Time chart of the MF number dialing
MUTE
MASK HS/DPN
tM
tFD
tM
tPFP
tM
tFD
tM
Figure 18 - Flashing time chart
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Figure 19 - Time chart of the number redialing
Table 5 - ELECTRIC CHARACTERISTICS
( VDD = (4.5 0.5) V; ILINE = 15 mA; f = 800 Hz; = (-25; +70) , if otherwise not stated below)
Description of Parameter, Unit of Measurement Consumption current, m
Storage current, mc Low level output current, m by output CS by output HS/DP by output MO by output LED Line voltage (by preset default value), V Transfer gain coefficient, dB Alteration of gain coefficient depending on frequency, dB Distortion coefficient, % Soft limitation level, V Soft limitation overload, dB Input signal rise time, mcsec/6dB Input signal fall time, msec/6dB Input impedance, khm, By inputs 1, 2 Attenuation during silence, dB Output noise voltage, dBm Input voltage range, V, by inputs 1, 2
Parameter Letter Identification IDD1 IDD2 IDD3 IDD4 IDDO
Mode Speech mode MF dialing 1) LD dialing 2). VDD=2.5 V Ring mode. VDD=2.5 V Standby mode. VDD = 2 V; Ta = 25 C
Norm Not less - Not more 5 8.0 400 600 0.1 -
Remark -
IOL(CS) VOL = 0.4 V IOL(HS/DP) IOL(MO) IOL(LED) VLI 13 m IL 100 m Transfer (TX) ATX 1, 2 relative to LI 1, 2 relative to LI. ATX/F f = (500 - 3400) Hz THD1 VLI 0.25VRMS 3) VAGC1 Speech mode ASCO - tATTACK - tDECAY - ZIN AMUTE VNO1 VIN MAX1 Silence mode = 25 C Differential Single-sided
1.5 1.5 1.5 4.0 4.0 35.1 -0.8 - 1.6VPEAK 4) 15 22.5 15 15
5.0 38.1 0.8 2 2.4VPEAK 25 37.5 25 25
60 - - - 72 0.75VPEAK 1.25VPEAK 0.375VPEAK 0.625VPEAK
-
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Table 5 Continued
Parameter Mode Letter Identification Output Driver (BJT) Input voltage range, V, by input LI VIN MAX2 - Dynamic range, V VTX - Reflection attenuation, dB RL ZRL = 1000 hm, = 25 C Attenuation alteration from temperature, - ZAC/ hm/ Reception (RX) Reception gain coefficient (by default), dB ARX0 LI relative to RO Loudness gain coefficient, dB AVOL1 Key VOL Loudness gain coefficient, dB AVOL2 (-/+) keys Alteration of the gain coefficient from the f from 500 to 3400 Hz ARX/F input frequency, dB Distortion coefficient, % D2 Speech mode. VRI 0.25 VRMS Soft limitation level, V VAGC2 Speech mode Soft limitation overload, dB ASCO Speech mode Input signal rise time, mcsec/6dB tATTACK VRI > 0.8 VRMS Input signal fall time, msec/6dB tDECAY - Noise output voltage, dBm 5) VNO2 Speech mode. = 25 C Undesirable frequency components, dBm VUFC from 50 to 20 kHz Input impedance, kOhm, by input RI ZIN RI Speech mode Input voltage range, V, by input RI VIN RI Speech mode Side tone suppresion, dB AST VRI 0.25 VRMS Input voltage range, V, by input STB VINST Speech mode Input impedance, kOhm, by input STB ZIN STB Speech mode DTMF 6) Mode Frequency deviation, % F MF tone level (lower group), dB VMF1 MFL = AGND MFL = VSS VMF2 Fore-distortion from the low level to high - VL-H level, dB Undesirable frequency components, dBm VUFC1 f from 300 Hz to 5 kHz MFL = VSS VUFC2 f from 5 to 14 kHz VUFC3 f from14 to 28.5 kHz VUFC4 f from 28.5 to 40 kHz Tone duration, msec tTD Mode: line 6 or 7 Intertone pause, msec tITP1 Mode:line 6 tITP2 Mode: line 7 Tone rise time, msec tTR Tone fall time, msec tTF Keyboard Wobble elimination time, msec td Input HS/DP Wobble elimination during transfer from low tHS-L Receiver lift-up status to high status, msec Wobble elimination during transfer from tHS-H1 No LD number dialing high status to low status, msec LD mode Number dialing rate, pulse/sec tDR1 Mode: line 1, 2 or 5 tDR2 Mode: line 3 or 4 Pulse duration, msec t/B1 Mode: line 2 t/B2 Mode: line 4 t/B3 Mode: line 1 or 5 t/B4 Mode: line 3 Description of Parameter, Unit of Measurement Norm min -2VPEAK 1.5VPEAK 18 0.375 max 2VPEAK 2.5VPEAK - 0.675 Remark
1.5 4.4 7.1 -1.5 - 0.8VPEAK - 22.5 15 -
4.5 6.4 9.1 1.5 2 1.2VPEAK 10 37.5 25 -72 -60 8.5 2VPEAK - 2VPEAK 85 1.2 -5.5 -17.5 3.0 -40 -50 -70 -80 85 85 170 5 1 -
7.5 -2VPEAK 26 -2VPEAK 75 - -2.5 -14.5 1.8 -
2
80 80 150 -
3, 4 3 3, 4 5 -
13.5 13.5 200
16.5 16.5 220
9.53 19.05 57 28.5 63 31.5
10.5 21 63 31.5 69 34.5
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IL2533
Table 5 Continued
Parameter Norm Mode Remark Letter min max Identification In progress of LD number dialing 260 280 tHS-H2 Duration of interpulse pause, msec tM1 Mode: line 2 38 42 tM2 Mode: line 4 19 21 tM3 Mode: line 1 or 5 31.5 34.5 tM4 Mode: line 3 15.7 17.3 Fore-digit pause, msec tPDP LD dialing. Alternately buttons 2, 31.5 38.5 1 are pressed Internal sign pause, msec tIDP Mode: line 1, 2, 3, 4 or 5 800 880 Flash duration, msec tFD1 Key R1 100 102 Key R2 270 300 tFD2 tFD3 Key R3 600 650 Duration of entry pause, msec tAP - 2.0 2.12 6 Time of repeat line interruption, sec tRP LD dialing. 1.5 1.7 - RP button pressing Tone Ring Melody output, V VMO Ring mode - - Melody delay, tMO - 10 Ring frequency, Hz f1 760 840 f2 1015 1120 f3 1260 1400 Call signal detection time, msec tDT - 150 Minimum detectable frequency, Hz fMIN Ring mode - 13 - Maximum detectable frequency, Hz fMAX 70 - - Quieting Tone. Program Mode Tone frequency, Hz fPT Programming mode, key entry 1400 1550 Voltage level at output RO, mV VRT Programming mode 55 65 Pulse duration while pressing a key, msec tRTD-E Key value entry 35 - Confirmation pulse duration, msec tRTD-A Limited by the key / 105 175 Deviation pulse duration, msec tRTD-R Incorrect key entry in the 140 180 7 program mode - Light Diode Output LED enabling time, msec tLED-ON Programming mode 80 - Interval, sec tLED-OFF 1 - Comfort Tone (DIMF) Voltage level at output RO relative to the VCT - -30 voltage level at input LS, dB Notes 1 It does not enable the frequency deviation of the ceramic resonator 2 Relative to the high group 3 Values are valid at the time of the automatic number dialing and have the minimum value at the time of the manual number dialing, i.. the tones will last as long as the key is pressed 4 At the time of the temporary MF mode 5 Rise time is the time from reaching 10% of the final value till the tone amplitude gets 90% of its final value 6 Pauses, entered within the limits of the first 5 entries of the sign chain, shall be automatically limited after 2 sec. Pauses, entered after position 5, can be limited manually only by pressing the key PS or LNR 7 Incorrect entry of a key in the program mode shall cause the tone sequence with 4 packs of tones of 40 msec and the pauses between the packs of 28 msec and the forced exit from the program mode Description of Parameter, Unit of Measurement
1) 2)
MF dialing - frequency number dialing LD dialing - pulse number dialing 3) VRMS - functioning voltage of the sinusoidal signal 4) VPEAK - peak (amplitude span) voltage of the sinusoidal signal 5) dBm - voltage value, determined by formula 1 dBm = 20 lg V / 0.775 V (4) where V - voltage, V 6) DTMF - dual frequency number dialing ( particular case of the frequency dialing)
25
IL2533
Table 6 - Limit Permissible and Limit Modes of Microcircuit Operation
Description of Mode Parameter, Unit of Measurement Supply voltage, V Low level input voltage, V High level input voltage, V Input voltage by pin LS, By pin LI, CS By pin STB, RI By pin MO Input current, mA Frequency, MHz Storage temperature, II F TSTG - - 3.58 - Parameter Letter Identification VDD VIL VIH VI Limit Mode min 4.0 0 0.7VDD - Permissible Norm max 5.0 0.3VDD VDD - min -0.3 -0.3 0.7VDD -0.3 -0.3 -2.0 -0.3 -25 - -65 Limit Mode Norm max 7.0 0.3VDD VDD+0.3 1.0 8.0 VDD+0.3 35.0 25 3.58 125
2,5
Soft limitation
10 9 VLS 8 7
Output voltage of line (LS), VPEAK
2,0
1,5
Current of line 20 mA Frequency 800Hz
6 5
1,0
Distortion
4 3
0,5
2 1
0 25 50 75 100 125 150
0
Output voltage (microphone inputs M1,M2), VPEAK
Figure 20 - Soft limitation and distortion during transfer
Distortion, %
26
IL2533
N SUFFIX PLASTIC DIP (MS - 001AB)
A 28 15 B 1 14
Dimension, mm Symbol A B C
F L
MIN 35.1 12.32
MAX 39.7 14.73 6.35
D F G
0.36 0.77 2.54
0.56 1.78
C -T- SEATING N G D 0.25 (0.010) M T K
PLANE
H
H J
15.24 0 2.92 15.24 0.2 0.38 10 5.08 15.87 0.38
M
J K L M N
NOTES: 1. Dimensions "A", "B" do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side.
D SUFFIX SOIC (MS - 059AD) Dimension, mm
A 28 15
Symbol A
B P
MIN 17.7 8.23 2.35 0.35 0.4 1.27
MAX 18.5 8.9 3.05 0.5 1.27
H
B C
1
G
14 C R x 45
D F G
J F M
-TD 0.25 (0.010) M T C M K
SEATING PLANE
H J K M P R 0 0.05 0.14 11.5 0.25
11.43 8 0.35 0.32 12.7 0.75
NOTES: 1. Dimensions A and B do not include mold flash or protrusion. 2. Maximum mold flash or protrusion 0.15 mm (0.006) per side for A; for B 0.25 mm (0.010) per side.
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