TECHNICAL DATA TONE / PULSE DIALER WITH FLASH FUNCTION IL91214A/B 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. ORDERING INFORMATION Device IL91214AN IL91214AD IL91214ADT IL91214BN IL91214BD IL91214BDT Operating Temperature Range Package Packing TA = -20 to 70 C DIP16 SOP16 SOP16 DIP18 SOP18 SOP18 Tube Tube Tape & Reel Tube Tube Tape & Reel D SUFFIX SOIC IL91214A/BN Plastic IL91214A/BD SOIC R1 DP KEYBOARD LOGIC KT R4 REDIAL MEMORY 32 DIGITS C1 OUTPUT LOGIC XMIT MUTE C3 MODE OUT VDD DTMF GENERATOR TONE MODE IN HK INPUT LOGIC CONTROL LOGIC OSCI OSC. OSCO Figure. BLOCK DIAGRAM April 2013, Ver. 02 IL91214A, IL91214B PIN DESCRIPITION Pin # A B 16 R4 MODE IN 02 15 R3 OSC I 03 14 R2 13 R1 12 C3 11 C2 10 C1 09 DP OSC O 04 Vss 05 Vdd 06 TONE 07 XMIT MUTE IL91214A 01 HK 08 HK 01 18 R4 MODE IN 02 17 R3 16 R2 15 R1 14 C3 13 C2 12 C1 XMIT MUT E 08 11 DP MODE OUT 09 10 KT 03 OSCO 04 Vss 05 Vdd 06 T ONE 07 IL91214B OSCI 1 2 1 2 Designation OSCI OSCO VSS VDD Hook switch input 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 Oscillator input Oscillator output Ground Supply output TONE Tone dialing output HK MODE IN 3 4 5 6 7 3 4 5 6 7 8 8 9 10 11 12 13 14 15 16 9 10 11 12 13 14 15 16 17 18 Description XMIT MUTE MODE OUT KT DP C1 C2 C3 R1 R2 R3 R4 Dialing transmission mute output Mode output pin Key-in tone output Dialing pulse output Keyboard column input Keyboard column input Keyboard column input Keyboard row input Keyboard row input Keyboard row input Keyboard row input KEYBOARD ASSIGNMENT 1 2 3 F1 4 5 6 F2 7 8 9 P */T 0 # RD C1 C2 C3 C4 R1 R2 R3 R4 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. April 2013, Ver. 02 IL91214A, IL91214B 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 which 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. XMIT MUTE 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 drain 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 IL91214ВN 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. R1 – 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. April 2013, Ver. 02 IL91214A, IL91214B 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 can 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. April 2013, Ver. 02 IL91214A, IL91214B b) Off Hook _ */Т _ D1 … Dn or Off Hook _ HFI _ D1 … Dn The initial mode is pulse when the mode selection pin MODE IN = VDD 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 accepted 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 /——— Pulse mode———————/ 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 discharge * / 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 = VDD or floating. At that time the mode can be set to DTMF mode by pressing * / T key. April 2013, Ver. 02 IL91214A, IL91214B 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. Both 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. April 2013, Ver. 02 IL91214A, IL91214B ABSOLUTE MAXIMUM RATINGS* Parameter Supply voltage Input voltage Output voltage Output voltage (DP, XMIT MUTE). Tone output current Power dissipation Storage temperature Symbol Absolute maximum value VDD VIN VOUT VOUT 6.0V VSS-0.3V ~ VDD+0.3V VSS-0.3V ~ VDD+0.3V 1.2V ITONE PD TSTG 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 O (VDD = 3.5 V, VSS = 0 V, FOSC = 3.579 МHz, T = 25 C, unless otherwise specified) Parameter Supply voltage, V Memory retention voltage, V Memory retention current, uА Symbol VDD VMR Min. Typ Max. Condition 2.0 5.5 Pulse mode 2.0 5.5 Tone mode 1 * IMR 0.05 0.4 VDD = 1.0 V HK = VDD IDDP 0.32 1.0 Pulse IDDT 0.6 2.0 Tone 0.03 0.05 0.5 10 All outputs unloaded Operation current, mА Standby current, uА * ISO VIH 0.8 VDD VDD VIL 0 0.2 VDD Input voltage, V Input current R1-R4, uА Tone out voltage, mV Sink current XMUTE, mА Sink current DP, mА Distortion, % HK=VDD НК=VSS All outputs unloaded. No key selected. VDD=1.5V VDD = 3.5 V IR 115 VOC 584 730 876 Column VOR 456 570 684 Row IOL1 0.9 5.3 VDD=3.5V, VOL=0.4V IOL2 1.1 5.3 VDD=3.5V, VOL=0.4V DIS % 1 VDD=3.5V RL=5K 5 * - in this mode IC functioning is not guaranteed. April 2013, Ver. 02 IL91214A, IL91214B AC CHARACTERISTICS O (VDD = 3.5 V, VSS = 0 V, FOSC = 3.579 МHz, T = 25 C, unless otherwise specified) Parameter Symbol TPAU TAOBK TD 0 TKD TKTD FKT TMFD 21 23 437 94 TTIDP 96 TMFDR TTIDPR 94 96 TM Break time, ms ТВ Pause time, s Auto-redial break time, s Delay time key valid to signal out, ms Key-in debounce, ms Key-in tone duration, ms Key-in tone frequency, Hz Minimal tone duration time, ms Minimum tone inter-digit pause, ms Redial tone duration, мs Redial tone inter-digit duration, ms Typ 33.3 16.7 66.6 33.3 824 458 2.2 2.2 Make time, ms Inter-digit pause time, ms Min. TIDP Max. Condition Dialing speed, pps 10 M/B=1/2 20 M/B=1/2 10 M/B=1/2 20 M/B=1/2 10 pps 20 pps VALUES OF GENERATED FREQUENCIES R/C Frequency Error, % Unit R1 697 + 0.31 Hz 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 Conditions FOSC = 3.579 МHz April 2013, Ver. 02 IL91214A, IL91214B 1. Pulse dialing mode. HK Key input 2 1 3 TKD : debouncing time 21 ms КТ TKTD (23 ms), f = 437 Hz XMIT MUTE TD TIDP 21 ms TM TM DP TM TB 2. Tone dialing mode. HK Key input 4 КТ 3 * 9 TKD XMIT MUTE TD 2.3 ms TMFD 2.3 ms 2.5 ms 2.3 ms TONE TTIDP MODE OUT 3. Redialing. HK Key input RD КТ XMIT MUTE TD TMFDR 2.5 ms TONE TTIDPR MODE OUT April 2013, Ver. 02 IL91214A, IL91214B 4. Switching mode operation (MODE IN control). HK Key input 2 3 */T 6 4 MODE IN КТ DP TM TIDP TM MODE OUT TIDP TD XMIT MUTE TPAU TMFD TONE 5. Switching mode operation (*/T key entry). HK Key input 2 3 */T 6 4 MODE IN КТ DP TM TIDP TM MODE OUT XMIT MUTE TD TIDP TPAU TMFD 2.5 ms 2.5 ms TONE April 2013, Ver. 02 IL91214A, IL91214B 6. One key redial using RD key (DTMF mode for example). HK Key input 2 RD 3 XMIT MUTE DP TAOBK TD TD 2.5 ms 2.5 ms TONE MODE OUT 7. Flash dialing HK Key input F 6 4 3 XMIT MUTE TFSH DP MODE OUT TPAU 2.5 ms 2.5 ms TONE April 2013, Ver. 02 IL91214A/B IL91214A, IL91214B April 2013, Ver. 02 IL91214A, IL91214B PACKAGE DIMENSION N SUFFIX PLASTIC DIP (MS - 001BB) A Dimension, mm 9 16 Symbol MIN MAX A 18.67 19.69 B 6.1 7.11 B 1 8 C F L C 5.33 D 0.36 0.56 F 1.14 1.78 G 2.54 H 7.62 -T- SEATING PLANE N G K M H D J 0.25 (0.010) M T NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. J 0 10 K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 D SUFFIX SOIC (MS - 012AC) Dimension, mm A 16 9 H B 1 G P 8 R x 45 C -TK D SEATING PLANE J 0.25 (0.010) M T C M 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. F M 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 1.27 H 5.72 J 0 8 K 0.1 0.25 M 0.19 0.25 P 5.8 6.2 R 0.25 0.5 April 2013, Ver. 02 IL91214A, IL91214B N SUFFIX PLASTIC DIP (MS - 001AC) A Dimension, mm 18 10 B 1 9 Symbol MIN MAX A 22.35 23.37 B 6.1 7.11 C F L C 5.33 D 0.36 0.56 F 1.14 1.78 G 2.54 H 7.62 -T- SEATING PLANE N G M K H D J 0.25 (0.010) M T NOTES: 1. Dimensions “A”, “B” do not include mold flash or protrusions. Maximum mold flash or protrusions 0.25 mm (0.010) per side. J 0 10 K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38 D SUFFIX SOIC (MS - 013AD) Dimension, mm A 18 10 H B 1 G 9 R x 45 C -TK D SEATING PLANE J 0.25 (0.010) M T C M 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. F M 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 1.27 H J 0 8 K 0.1 0.3 M 0.23 0.32 P 10 10.65 R 0.25 0.75 April 2013, Ver. 02