91214B

IL91214A IKSEMICON | Alldatasheet

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April 2013, Ver. 02 TONE / PULSE DIALER WITH FLASH FUNCTION IL91214A and IL91214B are tone/pulse dialers designed for providing standard DTMF or pulse signals. The ICs enable to: - generate standard DTMF or pulse signals of dialing as well as “flash” pulses; - store and redial last number; - generate pause in the transmitted package of dial signals; ICs are designed to be used in telephone sets. Figure. BLOCK DIAGRAM IL91214A/B IL91214A/BN Plastic IL91214A/BD SOIC KEYBOARD LOGIC REDIAL MEMORY

32 DIGITS

OSC. CONTROL LOGIC INPUT LOGIC MODE IN HK OSCI OSCO VDD TONE DP KT XMIT MUTE MODE OUT

ORDERING INFORMATION

TA = -20 to 70 C DIP16 Tube IL91214AD SOP16 Tube IL91214ADT SOP16 Tape & Reel IL91214BN DIP18 Tube IL91214BD SOP18 Tube IL91214BDT SOP18 Tape & Reel D SUFFIX SOIC

IL91214A, IL91214B April 2013, Ver. 02 PIN DESCRIPITION KEYBOARD ASSIGNMENT 1. */T – At Pulse mode this key works as Pulse -> DTMF key (T key), at DTMF mode the key works as *key. */T key will occupy one memory digit in either use. 2. F1 – Flash key. The break time is 297ms 3. F2 – Flash key for break time 640ms 4. P – Pause key (2.2 seconds) 5. RD – One key redial key 6. # - At pulse mode this key input is neglected, at DTMF mode this key works as # key. R4HK MODE IN OSCI OSCO XMIT MUTE DP 06 11 Vss Vdd TONE R4HK MODE IN OS CI OS CO XMIT MUTE DP Vss Vdd TONE 09 10 MODE OUT KT IL91214A IL91214B RD # 0 */T P 9 8 7 F2 6 5 4 F1 3 2 1 C1 C2 C3 C4 Pin # Designation Description A B 1 1 HK Hook switch input 2 2 MODE IN MODE IN = VDD: pulse mode, 10 Hz, М/В = 1/2, MODE IN = VSS: tone mode, MODE IN = floating mode,

20 Hz, М/В = 1/2

4 4 OSCO Oscillator output 5 5 VSS Ground 6 6 VDD Supply output 7 7 TONE Tone dialing output 8 8 XMIT MUTE Dialing transmission mute output

9 MODE OUT Mode output pin

10 KT Key-in tone output

9 11 DP Dialing pulse output 10 12 C1 Keyboard column input 11 13 C2 Keyboard column input 12 14 C3 Keyboard column input 13 15 R1 Keyboard row input 14 16 R2 Keyboard row input 15 17 R3 Keyboard row input 16 18 R4 Keyboard row input

IL91214A, IL91214B April 2013, Ver. 02 DESCRIPTION OF IC PINS FUNCTION HK pin (01) – hook switch input. This inverter input detects the condition of the phone set hook switch contact. "Off Hook" means connecting to GND, "On Hook" - connecting to VDD. MODE IN pin (02) - The mode selection pin for three states. The mode selection pin is checked for tone / pulse dialing the number at each entering with numeric key. In pulse mode, the dialing speed is checked with М /В ratio when entering with the first key. OSCI, OSCO pins (03, 04) – input and output pins of the generator between w hich the 3.58 MHz quartz resonator is connected. GND, VDD pins (05, 06) – power supply pins. TONE pin (07) – tone dialing signal output. When the actual keystroke is detected in DTMF mode, appropriate low and high band frequencies are generated that are the output dual tone signal. TONE output is in "Off" state (switched off) in pulsed mode. MUTE XMIT pin (08) – dial transmission output in silent mode. This is N -channel open drain output. Normally the pin is set to "Off". During DTMF dialing this output is set to "Enable" state. MODE OUT pin (09) – Only IC IL91214VN pin. Output mode pin. This is N -channel open d rain output. The pin is set to "On" for the tone output signal and to “Off” for the pulse output signal. KT pin (10) – Only IC IL91214 ВN pin. Tone output of key input. This pin with N -channel open drain forms the signal for every keystroke in pulse mode by pressing the function keys (RD, T, F1, F2, P). The output frequency is 437 Hz, the tone duration is 23 ms. DP pin (09 for IL91214АN, 11 for IL91214ВN) – pulse dialling output. This is N-channel open drain output. The output signal will be switched on during bond braking and switched off during bond formation in pulse dialling mode. R4 , C1 – C3 pins (10 – 16 for IL91214АN, 12 – 18 for IL91214ВN) – Keyboard pins. These pins serve as the interface to XY matrix keyboard. On the matrix keyboard 4 x 4 the input from the fourth bump C4 should be connected to GND.

IL91214A, IL91214B April 2013, Ver. 02 OPERATING PROCEDURE Description of symbols: In the description below, the signals are defined in relation to the push buttons or keys that are active. Off Hook – means that the receiver is off the hook switch. On Hook – means that the receiver is on the hook switch. D1 – represents the first digit dialed in the chain of digits. Dn – represents the last digit dialed in the chain of digits. Dn+1 – represents the beginning of a new chain of digits. Dn+m – represents the last digit of a new chain of digits. HFI – represents a switch that activates the mode of dialing the number without lifting the handset switching to the logic zero condition. */Т – is the key of transition from pulse dialing to DTMF- dialing RD – redial key. O – zero key (ZERO). P – pause key. F –"Flash" key. RECOMMENDED OPERATIONS:

1 Pulse mode operation

а) Off Hook _ D1 … Dn The pulse mode is defined as the initial mode, when the first entry from the keyboard is not * / T key accompanying Off Hook condition, and the mode selection pin is floating (MODE IN = VDD or floating). b) On Hook _ HFI_ D1 … Dn The pulse mode is defined as the initial mode, when entering with D1 key is not * / T, while MODE IN mode selection pin is either VDD or floating. The device will hold pause for 824 ms, then Off Hook condition is automatically detected, or HFI key is pressed. This occurs with pulse or DTMF dialling, if you press any key. The dial speed, or the bond formation / bond braking ratio is determined by entering with the first key, checking MODE IN status, and will not change. MODE IN status ca n switch over to dialling only from pulse to DTMF after entering with the first key.

2 Operation in DTMF mode

а) Off Hook _ D1 … Dn or On Hook _ HFI_ D1 … Dn, DTMF mode is determined as the initial mode, as MODE IN mode pin is connected to GND.

IL91214A, IL91214B April 2013, Ver. 02 b) Off Hook _ */Т _ D1 … Dn or Off Hook _ HFI _ D1 … Dn The initial mode is pulse when the mode selection pin MODE IN = V DD or is floating. * / T key can switch over the dial mode to tone mode. In contrast to the normal mode switch, entering with * / T key as the first key pressed, will not give any pause time. There are only 31 digits for redial memory available in the buffer to be used for operations (a) and (b) because * / T mode switch key will take one digit of the space.

3 Manual dialing with automatic access pause

Off Hook _ O _ P _ D1 … Dn Entering with the pause key can be a ccepted and stored in the redial memory. Each one is stored as a digit. Each key entering will result in 2.2 second pause.

4 Redial

а) Off Hook _ RD or On Hook _ HFI_ RD Up to 32 digits (pulse mode) or 31 digits (in tone mode) can be dialed using RD key. RD key is prohibited when pulse or tone signals are transmitted. Redial is prohibited, if the number exceeds 32 digits, as the redial memory can hold up to 32 digits. b) Off Hook _ RD _ D1 … Dn or On Hook _ HFI_ RD_ D1 … Dn After pressing RD key, we can add digits to the number in the redial memory. At the end of the dial the redial memory will contain the original digits plus the digits dialed after pressing RD key. Every time you press the redial key the saved number is dialed exactly as it was dialed before, regardless of the status of MODE IN pin.

5 Tone / pulse switch operation

а) Off Hook _ D1 … Dn _ /MODE IN pin switches to GND/_ Dn+1 … Dn+m Mode selection pin is always checked on entering with the tone or pulse mode key. Dialling can be switched from pulse to tone mode, but not vice versa. Switching MODE IN pin to GND will cause the chip to save the di scharge * / T before the first tone digit in the redial memory, and will automatically insert 2.2 second pause before tonal dialed digits. After switching the mode, the mode selection pin status will no longer be checked. So it will be not possible to switch from dial to pulse mode. b) Off Hook _ D1 … Dn _ */Т _ Dn+1 … Dn+m / Pulse mode / / DTMF mode / Pulse mode is initially determined by MODE IN pin = V DD or floating. At that time the mode can be set to DTMF mode by pressing * / T key.

IL91214A, IL91214B April 2013, Ver. 02 DTMF mode will begin as soon as the last pulse is transmitted. In this mode the signal from D n +1 Dn + m is sent through TONE pin as DTMF signal. If the sequence of digits before or after entering * / T key contains P key pin, or if MODE IN switch is pressed, a 2.2 second pause will be added to automatically inserted pause time, which also makes 3.57 seconds. B oth of the above described switch modes can store up to 31 digits in the redial memory.

6 One key redial

Off Hook _ D1 … Dn _ RD or On Hook _ HFI _ D1 … Dn _ RD If the dialing from D1 to Dn is finished, pressing RD will make force pulse dialing pin to go to a low state at 1.67 from the breaking moment, and 824 ms pause will be added automatically. If the pulses with the dialed number from D1 to Dn are not over, pressing the redial key will be ignored.

7 Flash key dial

Off Hook _ F _ D1 … Dn _ RD or On Hook _ HFI _ F _ D1 … Dn _ RD F keys imitate the fast operations of hook off/ hook on. Pressing the flashing keys F1 or F2 will cause 96 ms or 640 ms pause (or 297 ms, or 640 ms, depending on the model) at DP output. Then a 824 ms pause is made and dialing the digits from D1 to Dn continues. Then these digits are stored in the redial memory. Each time when you press F, the memory of the re dialed number will be cleaned to save the new entry. Moreover, MODE IN pin status will be checked again to set tone / pulse dialing mode. Similarly, to ensure that IC is operating properly, entering of new F keys will be ignored as long as the dialed digits end.

IL91214A, IL91214B April 2013, Ver. 02 ABSOLUTE MAXIMUM RATINGS* Parameter Symbol Absolute maximum value Supply voltage Input voltage Output voltage Output voltage (DP, XMIT MUTE). Tone output current Power dissipation Storage temperature VDD VIN VOUT VOUT ITONE PD TSTG  6.0V VSS-0.3V ~ VDD+0.3V VSS-0.3V ~ VDD+0.3V 1.2V  50 mA  500 mW -40ОС ~ +125ОС * Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICS (VDD = 3.5 V, VSS = 0 V, FOSC = 3.579 МHz, T = 25OC, unless otherwise specified) Parameter Symbol Min. Typ Max. Condition Supply voltage, V VDD 2.0 5.5 Pulse mode 2.0 5.5 Tone mode Memory retention voltage, V VMR 1 Memory retention current, uА * IMR 0.05 0.4 VDD = 1.0 V HK = VDD All outputs unloaded Operation current, mА IDDP 0.32 1.0 Pulse IDDT 0.6 2.0 Tone Standby current, uА * ISO 0.03 0.05 HK=VDD All outputs unloaded. No key selected. VDD=1.5V 0.5 10 НК=VSS Input voltage, V VIH 0.8 VDD VDD VDD = 3.5 V VIL 0 0.2 VDD Input current R1-R4, uА IR 115 Tone out voltage, mV VOC 584 730 876 Column VDD=3.5V RL=5K VOR 456 570 684 Row Sink current XMUTE, mА IOL1 0.9 5.3 VDD=3.5V, VOL=0.4V Sink current DP, mА IOL2 1.1 5.3 VDD=3.5V, VOL=0.4V Distortion, % DIS % 1 5 * - in this mode IC functioning is not guaranteed.

IL91214A, IL91214B April 2013, Ver. 02 AC CHARACTERISTICS (VDD = 3.5 V, VSS = 0 V, FOSC = 3.579 МHz, T = 25OC, unless otherwise specified) Parameter Symbol Min. Typ Max. Condition Dialing speed, pps Make time, ms TM 33.3 10 M/B=1/2 16.7 20 M/B=1/2 Break time, ms ТВ 66.6 10 M/B=1/2 33.3 20 M/B=1/2 Inter-digit pause time, ms TIDP 824 10 pps 458 20 pps Pause time, s TPAU 2.2 Auto-redial break time, s TAOBK 2.2 Delay time key valid to signal out, ms TD 0 Key-in debounce, ms TKD 21 Key-in tone duration, ms TKTD 23 Key-in tone frequency, Hz FKT 437 Minimal tone duration time, ms TMFD 94 Minimum tone inter-digit pause, ms TTIDP 96 Redial tone duration, мs TMFDR 94 Redial tone inter-digit duration, ms TTIDPR 96 VALUES OF GENERATED FREQUENCIES R/C Frequency Error, % Unit Conditions R1 697 + 0.31 Hz FOSC = 3.579 МHz R2 770 + 0.19 Hz R3 852 + 0.03 Hz R4 941 + 0.10 Hz С1 1.209 + 0.57 Hz С2 1.336 - 0.32 Hz С3 1.477 - 0.35 Hz

IL91214A, IL91214B April 2013, Ver. 02 1. Pulse dialing mode. 2. Tone dialing mode. 3. Redialing. КТ HK 4 3 * 9 Key input КТ XMIT MUTE TONE MODE OUT TTIDP TMFD TD 2.3 ms 2.5 ms 2.3 ms 2.3 ms TKD HK Key input КТ XMIT MUTE TONE MODE OUT RD TD TMFDR TTIDPR 2.5 ms TKD : debouncing time 21 ms 2 1 3 TKTD (23 ms), f = 437 Hz TD TM TIDP TM TM TB 21 ms HK Key input XMIT MUTE DP

IL91214A, IL91214B April 2013, Ver. 02 4. Switching mode operation (MODE IN control). 5. Switching mode operation (*/T key entry). 2 3 */T 6 4 HK Key input MODE IN КТ DP MODE OUT XMIT MUTE TONE TM TIDP TM TIDP TD TPAU TMFD 2 3 */T 6 4 HK Key input КТ DP TM TIDP TM TIDP TD TPAU TMFD 2.5 ms 2.5 ms MODE IN XMIT MUTE MODE OUT TONE

IL91214A, IL91214B April 2013, Ver. 02 6. One key redial using RD key (DTMF mode for example). 7. Flash dialing 2.5 ms TD TD 2.5 ms TAOBK 2 3 RD HK DP XMIT MUTE MODE OUT Key input TONE F 6 4 3 TFSH TPAU 2.5 ms 2.5 ms HK Key input XMIT MUTE MODE OUT DP TONE

IL91214A, IL91214B April 2013, Ver. 02 IL91214A/B

IL91214A, IL91214B April 2013, Ver. 02 PACKAGE DIMENSION N SUFFIX PLASTIC DIP (MS - 001BB) Symbol MIN MAX A 18.67 19.69 B 6.1 7.11 C 5.33 D 0.36 0.56 F 1.14 1.78 G H J 0 10 K 2.92 3.81 NOTE S: L 7.62 8.26 1. Dimensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.36 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SUFFIX SOIC (MS - 012AC) Symbol MIN MAX A 9.8 10 B 3.8 4 C 1.35 1.75 D 0.33 0.51 F 0.4 1.27 G H J 0 8 NOTE S: K 0.1 0.25 1. Dimensions A and B do not include mold flash or protrusion. M 0.19 0.25 5.72 2.54 7.62 1.27 Dimension, mm Dimension, mm A BH C K C M J F M P G D R x 45 SEA TING 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

IL91214A, IL91214B April 2013, Ver. 02 N SUFFIX PLASTIC DIP (MS - 001AC) Symbol MIN MAX A 22.35 23.37 B 6.1 7.11 C 5.33 D 0.36 0.56 F 1.14 1.78 G H J 0 10 K 2.92 3.81 NOTE S: L 7.62 8.26 1. Dimensions “A”, “B” do not include mold flash or protrusions. M 0.2 0.36 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SUFFIX SOIC (MS - 013AD) Symbol MIN MAX A 10.1 10.5 B 7.4 7.6 C 2.35 2.65 D 0.33 0.51 F 0.4 1.27 G H NOTE S: J 0 8 1. Dimensions A and B do not include mold flash or protrusion. K 0.1 0.3 for A; for B ‑ 0.25 mm (0.010) per side. P 10 10.65 R 0.25 0.75 2.54 7.62 1.27 Dimension, mm Dimension, mm A BH C K C M J F M G D R x 45 SEA TING 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