IL2533

IL2533 INTEGRAL | Alldatasheet

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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 ─ 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). ─ 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 LS MFL RO VDD AGND STB CI LO LCC OSC HS/DP MODE RI LI VSS CS LED FCI package pin out PACKAGE IL2533D assembly to 28-pin SO-package MS-013AE. IL2533N assembly to 28-pin DIP-package MS-011AB.

Versatility of the circuit provides possibility of variants selecting on circuit\s 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. La L b Adaptation to line Power supply generating Masking on direct current VDD CS Line current reading Soft encrease LS Tune generator Ring frequency determination Controlling logic VSS HS/DP Генератор тона LLC R1 STB AGND Clock oscillator OSC AGNDLLC Hi LLC Lo LLC Off Keyboard controller RAM MFL Sound switch off LED RO С4С3С2С1 Keyboard MODE R7 R8 R10 R11 R13 R12 R14 R15 R16 R17 R18 R19 R20 R21 C5 C6 C10 C11 SA1 SA2 SA3 VD1 VD2 VD3 VD4 VD5 VD6 VD9 VD10 VD8 VD7 VT1 VT2 VT3 VT4 Figure 2 – Typical application flow-chat

Table 1 – Circuit pins description Pin No Pin letter symbol Function 01 LS Line current input. Input for line current determination (responsibility setup) 02 MFL MF level setup. For DTMF level setup can be used potential divider, connected from this pin to AGND and to VSS

03 RO Receipt output

Output for controlling of dynamic hearing aid with impedance from 140 to 300 Оhm 04 VDD Positive supply voltage. Supply voltage output for circuit

05 AGND Analog ground, Analog ground for amplifiers

06 STB Balanced input side tone. Input for side tone suppression 07 CI Entire impedance output. For complex impedance, capacitor should be connected to this output 08 MO Melody output. Melody generator PWM-output for tone ring. When output not active, in “Switch off” state 09 LLC Line waste compensation. Selected output for loss compensation in line. LLC=AGND : 20-50 mА; LLC=VDD : 45-75 mА; LLC=VSS :no compensation 10 HS/DP 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 11 OSC Oscillator input. Input for ceramic resonator (3.5 МHz) 12 MODE Input of mode denomination selection. Mode output Function Open Interlocking number dialing Row 1 LD mode, 10 pulse/s, 33/66ms Row 2 LD mode, 10 pulse /s , 40/60ms Row 3 LD mode, 20 pulse /s , 16/33ms Row 4 LD mode, 20 pulse /s , 20/30ms Row 5 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 C4 14 C3 15 C2 16 C1 Keyboard line. (see keyboard scheme at figure 3)

Keyboard line. (see keyboard scheme at figure 3) 21 FCI 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 Microphone outputs 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) 4 Indirect memory (two key) 10 Redialing yes LNR key yes Insert by LNR pause key yes Pause key PS yes Р/М key or МТ Р/М Tone/Pulse key (Т/Р) yes Temporary MF key "∗" yes Automatic setup key (А – D) yes Volumes keys (VOL, "-/+") yes Volume reset by off-hook yes Tone ring programming yes Pause duration “flash” R3 600m

Keyboard connecting is shown at figure 3. Key closed, RON MAX = 1 Ohm Key opened, ROFF MIN = 1 Ohm P/M 1 2 3 4 5 6 7 8 9 0 * # R1 R2 R3 LNR VOL + - A B C D RP PS T/P M1 M2 M3 M4 MR C1 C2 C3 C4 Figure 3 – Keyboard connecting Power-up set up On-chip voltage on preset circuit traces supply v oltage 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 А. Operational range by lowered effectiveness is from 5 to 13 mА (parallel operation). In operational range all functions are active. By line currents lower than 13 m А 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 mА by following form: VLS = VLI + ILINE × 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 Z AC, Ohm, is determining according to following form ZAC = 33 × Z1

Good side tone suppression can be reached by using of following equal LINE BAL Z Z Z Z = (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 mА, when LLC = AGND, and by currents from 45 to 75 m А, when LLC corresponds to high state (@R1=30 Ом). Line attenuation compensation become disconnected, when LLC corresponds to low state (see figure 7).

A B 13 100 мкФ 600 Ом 10n 10V 30 Ом 300 Ом 6 кОм 10 мкФ 1 мкФ КТ 660А (КТ 3107 Б) 15 нФ 50 мкФ x10 В 100 мкФ 150 Ом 100 мкФ 3.58 МГц 10 кОм SA1 1 SA2 мA мA V VP1 P4 SW1 SW210 кОм 22 кОм RL 330 кОм 10 нФ 10 нФ LED 22 1 кОм SW3 SW4 КТ 521 (КТ3107Б) КТ 520 (КТ 3102Б) 47 кОм 10 кОм 100 кОм 1 мОм

Figure 8 – Side Tone Balance DIALING FUNCTION DIGITAL KEYS Key scanning is allowed, when HS/DPN is set up as high and V DD is higher than VREF. A valid key is detected from the keyboard by connecting the appropriate row to the column (R ON < 1 кОм). 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 Р/М key is used for entry into the program/no-signal state. Pressing Р/М key disconnects speech circuit and device is set to program state. Repetitive pressing of P/M key disconnects no- signal 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 А, В, С 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.

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 с (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. Duri ng 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 М1 to М12 are keys of direct memory access, and MR key is used for abbreviated dialing. Table 2 Memory structure Quantity of numbers or keys Number storing 14 Keys of direct memory access 4 Indirect memory 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 М1, where "–" is pause/waiting, and 123 is extension number: 1) Lift up the receiver. Wait for tone signal; 2) Press М1 (45678 will be dialed); 3) Wait for tone signal from called РАВХ; 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. РАВХ – PAX with outcoming and incoming communication.

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 receiverснять, 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 ns 1 - 2 - 3 - А 697 Hz Sig ns 4 - 5 - 6 - В 770 Hz Sig ns 7 - 8 - 9 - С 852 Hz Sig ns * - 0 - # - D 941 Hz Upper Group Sig ns 1 - 4 - 7 - * 1209 Hz Sig ns 2 - 5 - 8 - 0 1336 Hz Sig ns 3 - 6 - 9 - # 1477 Hz Sig ns А – В - С – D 1633 Hz 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 В (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 Оhm) The preliminary distortion constitutes 2.6 dB. MF tones comply with the recommendations of CEPT.

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 Р/М and #, indicated with a sign in compliance with Table 4. Table 4 SIG N FREQUENCY OF REPETITION LOUDNESS 1 1 time (50 msec pause) -16 dB 2 1 time (50 msec pause) - 7 dB 3 1 time (50 msec pause) 0 dB (max) 4 4 times -16 dB 5 4 times - 7 dB 6 4 times (by default) 0 dB (max) 7 10 times -16 dB 8 10 times - 7 dB 9 10 times 0 dB (max)

0 None OFF

The procedure is completed by the repetitious pressing of the key Р/М. 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: 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 Р/М, 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.

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). ZLINE 30 Ом RI LI CS CI STB RO DTMF ZSYN (970 Ом) ZREF 32.3 x Z REF 20 k 20 k 8 k80 k 0 dB Громкость 26dB 10dB 23dB12dB Отключ. звука SC Комфорт. тон Компенсация потерь в линии ZBAL (10 x ZLINE) 300 Ом 하 Figure 9 – Speech circuit model by the alternating current

STATUSES INPUTS PROCESSING Processing in compliance Saving (storing in Forced break (sec) Number dialing (LD Receiver put- Receiver lift- Speech mode No operation (receiver put, no Number entry Key pressing Cut-off from outsiders Read-out from Entry in compliance Status in compliance w ith Incorrect entry Erroneous program entry Programming Figure 10 – Symbols

Figure 11 – Ring tone programming

Figure 12 – Time MF

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 Мягкое ограничение 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. МЕТHOD 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. е. from dialing incorrect numbers, deletion of the stored numbers, etc.; - to be matching, simple and convenient in operation. tIDP tPDP tB tM tB tM tIDP tPDP tB tM Молчание Маскирование HS/DP Figure 15 – Time chart of the number dialing

Figure 19 – Time chart of the number redialing Table 5 – ELECTRIC CHARACTERISTICS ( VDD = (4.5 ± 0.5) V; ILINE = 15 mA; f = 800 Hz; Та = (–25; +70) °С, if otherwise not stated below) Norm Description of Parameter, Unit of Measurement Parameter Letter Identification Mode Not less Not more Remark Consumption current, mА IDD1 Speech mode – 5 – IDD2 MF dialing 1) 8.0 IDD3 LD dialing 2). VDD=2.5 V 400 IDD4 Ring mode. VDD=2.5 V 600 Storage current, mcА IDDO Standby mode. VDD = 2 V; Ta = 25 °C 0.1 Low level output current, mА by output CS IOL(CS) VOL = 0.4 V 1.5 – by output HS/DP IOL(HS/DP) 1.5 by output MO IOL(MO) 1.5 by output LED IOL(LED) 4.0 Line voltage (by preset default value), V VLI 13 mА ≤ IL ≤ 100 mА 4.0 5.0 Transfer (TX) Transfer gain coefficient, dB ATX М1, М2 relative to LI 35.1 38.1 Alteration of gain coefficient depending on frequency, dB ∆ATX/F М1, М2 relative to LI. f = (500 – 3400) Hz -0.8 0.8 Distortion coefficient, % THD1 VLI ≤ 0.25VRMS 3) – 2 Soft limitation level, V VAGC1 Speech mode 1.6VPEAK 4) 2.4VPEAK Soft limitation overload, dB ASCO – 15 25 Input signal rise time, mcsec/6dB tATTACK – 22.5 37.5 Input signal fall time, msec/6dB tDECAY – 15 25 Input impedance, kОhm, By inputs М1, М2 ZIN 15 25 Attenuation during silence, dB AMUTE Silence mode 60 – Output noise voltage, dBm VNO1 Та = 25 °C – - 72 Differential 0.75VPEAK 1.25VPEAK – Input voltage range, V, by inputs М1, М2 VIN MAX1 Single-sided 0.375VPEAK 0.625VPEAK

Norm Description of Parameter, Unit of Measurement Parameter Letter Identification Mode min max Remark Output Driver (BJT) Input voltage range, V, by input LI VIN MAX2 – -2VPEAK 2VPEAK Dynamic range, V VTX – 1.5VPEAK 2.5VPEAK Reflection attenuation, dB RL ZRL = 1000 Оhm, Та = 25 °C 18 – Attenuation alteration from temperature, Оhm/°С ∆ZAC/ТЕМР – 0.375 0.675 Reception (RX) Reception gain coefficient (by default), dB ARX0 LI relative to RO 1.5 4.5 Loudness gain coefficient, dB AVOL1 Key VOL 4.4 6.4 Loudness gain coefficient, dB AVOL2 (-/+) keys 7.1 9.1 Alteration of the gain coefficient from the input frequency, dB ∆ARX/F f from 500 to 3400 Hz -1.5 1.5 Distortion coefficient, % ТНD2 Speech mode. VRI ≤ 0.25 VRMS – 2 Soft limitation level, V VAGC2 Speech mode 0.8VPEAK 1.2VPEAK Soft limitation overload, dB ASCO Speech mode – 10 Input signal rise time, mcsec/6dB tATTACK VRI > 0.8 VRMS 22.5 37.5 Input signal fall time, msec/6dB tDECAY – 15 25 Noise output voltage, dBm 5) VNO2 Speech mode. Та = 25 °C – -72 Undesirable frequency components, dBm VUFC from 50 to 20 kHz -60 Input impedance, kOhm, by input RI ZIN RI Speech mode 7.5 8.5 Input voltage range, V, by input RI VIN RI Speech mode –2VPEAK 2VPEAK Side tone suppresion, dB AST VRI ≤ 0.25 VRMS 26 – Input voltage range, V, by input STB VINST Speech mode –2VPEAK 2VPEAK Input impedance, kOhm, by input STB ZIN STB Speech mode 75 85 DTMF 6) Mode Frequency deviation, % F – 1.2 1 VMF1 MFL = AGND -2.5 -5.5 – MF tone level (lower group), dB VMF2 MFL = VSS -14.5 -17.5 Fore-distortion from the low level to high level, dB ∆VL-H – 1.8 3.0 VUFC1 f from 300 Hz to 5 kHz – -40 2 VUFC2 f from 5 to 14 kHz -50 VUFC3 f from14 to 28.5 kHz -70 Undesirable frequency components, dBm MFL = VSS VUFC4 f from 28.5 to 40 kHz -80 Tone duration, msec tTD Mode: line 6 or 7 80 85 3, 4 Intertone pause, msec tITP1 Mode:line 6 80 85 3 tITP2 Mode: line 7 150 170 3, 4 Tone rise time, msec tTR – 5 5 Tone fall time, msec tTF Keyboard – Wobble elimination time, msec td 13.5 16.5 Input HS/DP Wobble elimination during transfer from low status to high status, msec tHS-L Receiver lift-up 13.5 16.5 Wobble elimination during transfer from high status to low status, msec tHS-H1 No LD number dialing 200 220 \`LD mode Number dialing rate, pulse/sec tDR1 Mode: line 1, 2 or 5 9.53 10.5 tDR2 Mode: line 3 or 4 19.05 21 Pulse duration, msec t/B1 Mode: line 2 57 63 t/B2 Mode: line 4 28.5 31.5 t/B3 Mode: line 1 or 5 63 69 t/B4 Mode: line 3 31.5 34.5

Mode min max RemarkDescription of Parameter, Unit of Measurement tHS-H2 In progress of LD number dialing 260 280 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, 1 are pressed 31.5 38.5 Internal sign pause, msec tIDP Mode: line 1, 2, 3, 4 or 5 800 880 tFD1 Key R1 100 102 Flash duration, msec tFD2 Key R2 270 300 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. RP button pressing 1.5 1.7 – Tone Ring Melody output, V VMO Ring mode – – Melody delay, мс 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 Р/М 105 175 Deviation pulse duration, msec tRTD-R Incorrect key entry in the program mode 140 180 7 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 voltage level at input LS, dB VCT – -30 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.е. 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 w ithin the limits of the first 5 entries of the sign chain, s hall 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 1) MF dialing – frequency number dialing 2) 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)

Table 6 – Limit Permissible and Limit Modes of Microcircuit Operation Limit Permissible Mode Limit Mode Norm Norm Description of Mode Parameter, Unit of Measurement Parameter Letter Identification min max min max Supply voltage, V VDD 4.0 5.0 -0.3 7.0 Low level input voltage, V VIL 0 0.3VDD -0.3 0.3VDD High level input voltage, V VIH 0.7VDD VDD 0.7VDD VDD+0.3 Input voltage by pin LS, В VI – – -0.3 1.0 By pin LI, CS -0.3 8.0 By pin STB, RI -2.0 VDD+0.3 By pin MO -0.3 35.0 Input current, mA II -25 25 Frequency, MHz F – 3.58 – 3.58 Storage temperature, °С TSTG – – -65 125 150125100755025 0,5 1,0 1,5 2,0 2,5 VLS Current of line 20 mA Frequency 800Hz Distortion, % Output voltage of line (LS), VPEAK Output voltage (microphone inputs M1,M2), мVPEAK Distortion Soft limitation Figure 20 – Soft limitation and distortion during transfer

(MS - 001AB) Symbol MIN MAX A 35.1 39.7 B 12.32 14.73 C6 . D 0.36 0.56 F 0.77 1.78 G H J0 ° 10° K 2.92 5.08 NOTES: L 15.24 15.87 1. Dimensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.38 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N0 .38 D SUFFIX SOIC (MS - 059AD) Symbol MIN MAX A 17.7 18.5 B 8.23 8.9 C 2.35 3.05 D 0.35 0.5 F 0.4 1.27 G H NOTES: J0 ° 8° 1. Dimensions A and B do not include mold flash or protrusion. K 0.05 0.35 R 0.25 0.75 11.43 Dimension, mm Dimension, mm 2.54 15.24 1.27 A B C K C M J F M PH G D R x 45 SEATING PLANE 0.25 (0.010) M T -T- L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C