IL91210E

IL91210E INTEGRAL | Alldatasheet

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Technical content

High-Performance Silicon-Gate CMOS

ORDERING INFORMATION

TA = -20° to 70° C The IL91210E is a single-chip, silicon gate, CMOS integrated circuit with an on-chip oscillator for a 3.58 MHz crystal or ceramic resonator. It provides dialing pulse (DP) or dual tone m ulti-frequency (DTM F) dialing. A standard 4x4 matrix keyboard can be used to support either DP or DTMF modes. Up t o 32 di gits can be saved i n the on-chip RAM for reading. In t he DTM F m ode, m inimum t one durat ion and minimum intertone pause are provided for rapid dialing. Maximum tone duration is dependent upon the key depression time in manual dialing.

• One touch redial operation
• Tone/Pulse switchable
• 32-digit capacity for redialing
• Automatic mixed redialing (last number redial) of pulse to DTMF with multiple automatic access pauses • PABX auto-pause is 2.2 second
• DTMF Timing: Manual dialing: minimum duration for bursts and pauses Redialing: calibrated timing
• Wide operating voltage range: 2 V to 5.5 V
• Digits dialed manually after redialing are cascadable and stored as additional digits for the next redialing
• Uses inexpensive ceramic resonator (3.58 MHz)
• Built-in power up reset circuit
• Four extra function keys: flash, pause, redial and DP or DTMF mixed dialing
• Four-by-four (or 2 of 8) keyboard can be used
• Low standby current
• Dial Pulse Rate: 10 pps PIN ASSIGNMENT

PIN 11 = GND PIN 10 = VCC Keyboard Assignments* 1 2 3 F1 R1 4 5 6 F2 R2 7 8 9 P R3 */T 0 # RD R4 C1 C2 C3 Internal Pull Low *Notes: 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 mode. 2. F1 - Flash key. The break time is 96 ms. 3. F2 - Flash key for break time 640 ms. 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.

Pin No. Designation Description 1 R1 2 R2 3 R3 4 R4 5 HK Hook switch input. This inverter input pin detects the state of the hook switch contact. “Off Hook” is represented by a GND condition. “On Hook” is represented by a VCC condition. 6 M/B Make/Break Ratio Select Input. This input allows selection of the Make/Break ratio. M/B = VCC : 1/2 M/B = GND : 2/3 7 MODE SELECT Mode select input. This input allows the selection of pulse mode or DTMF mode. MODE SELECT = VCC : Pulse mode operation MODE SELECT = GND : Tone mode operation OSCI OSC0 Oscillator Input and Output pins. The time base for IL91210E is a crystal controlled on-chip oscillator, which is completed by connecting a 3.58 MHz crystal or ceramic resonator between OSCI and OSC0 pins.

10 VCC

11 GND

12 TONE Tone dialing output. When a valid keypress is detected in the DTMF mode, appropriate low group and high group frequencies are generated, which hybridize the dual tone output. TONE output is in the “OFF” state in pulse mode. 13 XMITMUTE Dialing transmission mute output. This is an N-channel open drain output The XMIMUTE is normally “OFF”. During pulse or DTMF dialing this output is “ON”. 14 DP Dialing pulse output. This is an N-channel open drain output. The normal output will be “ON” during Break and “OFF” during Make in the pulse dialing mode. 15 C1 16 C2 17 C3 18 C4 Internal Pull low. Key board pins. These inputs serve as the interface to a 4x4 matrix keyboard. Power supply pins. This device is designed to operate from 2.0 V to 5.5 V. Key board pins. These inputs serve as the interface to a 4x4 matrix keyboard.

Symbol Definitions: In the description below, signals are defined in terms of the key or switch which is activated. Off Hook means t he phone was t aken off the hook. On Hook means that the receiver is onf the hook. D1 stands for the first digit dialed in a string of digits. Dn stands for t he last digit dialed in a string of digits. Dn+1 stands for the begi nning of a new string of digits. Dn+m stands for t he last digit in a new string of digits. */T is the Pulse-to-DTMF key RD is the Redial key O is the Zero key. P is the Pause key. F is the Flash key. 1. Pulse mode operation Pulse mode is d efined as th e initial mode, provided the first keyboard input is not the */T key following the Off Hook condition and the mode selection pin is VCC (MODE SELECT = VCC). b. Pulse mode is d efined as th e initial mode, provided the key input D1 is not */T while the mode selection pin i s V CC. The chip will pause for 824 ms automatically after it detects an Off Hook condition. It then proceeds with pulse or DTMF dialing if any keys have been depressed. The di aling rat e or make/break ratio is d ecided at th e first key entry by checking the MODE SELECT & M/B status and will not be altered. The MODE SELECT status can only switch th e d ialing mode fro m Pu lse to DTMF after the first key entry. 2. DTMF mode operation DTMF m ode is d efined as th e in itial m ode o f the mode selection pin if MODE SELECT is GND. The initial mode is pulse mode if the mode selection pin, MODE SELECT, is V CC. The */T key can switch the dialing m ode t o t one m ode. Unlike normal mode switching, the */T key entry, as the first key pressed, will not produce any pause time. There are onl y 31 di git of redi al m emory available in t he buffer t o be used for operat ions a and b , sin ce th e m ode switch ing key, */T , will occupy one digit of space. 3. Manual dialing with automatic access pause Off Hook O */T D1 . . . . Dn Pause key entries can be accepted and stored in the redial memory. Each is stored as a digit. Each key-in will provide a pause of 2.2 seconds, depending on which model you are using. 4. Redial a. Off Hook RD Up to 32 di gits (in pulse mode) or 31 di gits (in tone mode) can be di aled using the RD is disabled while pulse or to ne sig nals are b eing tran smitted. Red ial will also b e in hibited if th e last n umber dialed exceeds 32 digits because the redial memory can only hold 32 digits. After pressing the RD key, we can add di gits to the number in redial memory. When finished dialing, the redial m emory will co ntain th e original digits plus the digits dialed after pressing RD. Each tim e the redial k ey is p ressed, th e sto red n umber will be dialed exactly the sam e as it was previously, regardless of the status of the MODE SELECT pin. 5. TONE/PULSE switching operation a. Off Hook D1 . . . Dn MODE SELECT pin Pulse Mode switched to GND Dn+1 . . . . Dn+m DTMF Mode The mode selection pin is always checked for tone or pulse mode key entry. Dialing can be swi tched from pulse to tone mode, but not from tone to pulse mode. Switching the MODE SELECT pin to GND will cause the chip to store a */T digit prior to the first to ne d igit in th e red ial m emory an d will automatically i nsert a 2.2 second pause before t he tone digits are dialed out . Aft er t he mode has been switched, the status of the mode selection pin will no longer be checked. Therefore, it will not be possible to switch from tone to pulse mode.

b. Off Hook D1 . . . Dn */T Dn+1 Pulse Mode Dn+m DTMF Mode If the dialing of D1 to Dn is completed, pressing RD will cause the p ulse d ialing p in to g o lo w fo r 2.2 seconds of break tim e and an 824 ms pause will automatically be added. Ot herwise, t he pressing of the redial key will be ignored. Pulse m ode is in itially d efined with th e m ode selection pin, MODE SELECT, equal to VCC. At this time, t he m ode can be swi tched t o DTM F by pressing th e * /T k ey. DTMF m ode will begin as soon as the last pulse has been transm itted. In this mode, Dn+1 t hrough Dn+m are sent t hrough t he TONE OUT pin as DTMF signals. If a P key entry is contained in the series of digits before or after the */T entry, or the MODE SELECT switch is depressed, 2.2 second pause will be added to the automatically inserted pause tim e, wh ich is also 2.2 seconds. Both of the above switching modes can store as many as 31 digits in the redial memory. 6. One-Key redialing 7. Flash dialing The fl ash key s em ulate qui ck On-Off Hook operations. Pressin g th e flash k eys, F1 or F2, will cause a break of 96 ms or 640 ms on the DP output pin. Then, it will pause for 824 ms and continue dialing th e d igits, D1 to Dn . Th ese d igits are then stored in the redial m emory. Each time the flash key is pressed, the redial memory will be cleared to store a new entry. In addition, the MODE SELECT status will be checked ag ain fo r th e settin g o f th e Tone/Pulse dialing mode. Similarly, to m ake su re th at th e IC is working properly, new flash key inputs will be ignored as long as the digits that were dialed have not finished. MAXIMUM RATINGS* Symbol Parameter Value Unit VCC DC Supply Voltage (Referenced to GND) -0.3 to +6.0 V VIN DC Input Voltage (Referenced to GND) -0.3 to VCC +0.3 V VOUT DC Output Voltage (Referenced to GND) -0.3 to VCC +0.3 V VOUT DC Output Voltage (DP, XMITMUTE) -0.3 to 1.2 V ITONE DC Output Current(Tone) 50 mA PD Power Dissipation in Still Air, Plastic DIP** 500 mW Tstg Storage Temperature -40 to +125 °C * Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. ** Durating: -10 mW/°C from 65°C to 70°C.

RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VCC DC Supply Voltage (Referenced to GND) 2.0 5.5 V VIN DC Input Voltage (Referenced to GND) 0 VCC V VOUT DC Output Voltage (Referenced to GND) 0 VCC V TA Operating Temperature -20 +70 °C This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions m ust be taken to avoid applications of any voltage highe r than maximum rated voltages to this high-impedance ci rcuit. For proper operat ion, V IN and V OUT should be const rained t o t he range GND ≤(VIN or VOUT)≤VCC. Unused inputs must always be t ied to an appropri ate logic voltage level (e.g., ei ther GND or VCC). Unused outputs must be left open. DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND, VCC =2.0 V to 5.5 V, TA = -20 to +70°C) Guaranteed Limits Symbol Parameter Test Conditions Min Max Unit VIH High-Level Input Voltage 0.8VCC VCC V VIL Low-Level Input Voltage 0 0.2VCC V VMR Minimum Memory Retention Voltage VCC = 1.0 V 1.5 V VOC Tone Output Voltage Column VCC = 3.5 V 400 1000 mVp-p VOR Tone Output Voltage Row RL = 5KΩ 300 800 mVp-p IR Input Current (R1 - R4, C1 - C3) VCC = 3.5 V VIL = 0 V 10 300 µA IOL1 Minimum Output Current, XMITMUTE VCC = 3.5 V VOL = 0.4 V 0.5 mA IOL2 Minimum OutputSink Current, DP VCC = 3.5 V VOL = 0.4 V 0.6 mA IMR Memory Retention Current VCC = 1.0 V, HK = VCC All outputs unloaded 0.6 µA ICCP Pulse mode 1.5 mA ICCT Maximum Operation Current Tone mode All outputs unloaded 3.0 mA ISBP Pulse mode HK=VCC=1.5 V 0.05 µA ISBT Maximum Standby Current Tone mode HK=GND All outputs unloaded. No key selected DIS% Distortion *Note 1, VCC = 3.5 V 7 % Note 1: DIS% = 100.(V1 2 + V2 2 +. . . + Vn (VOC 2 + VOR b. VOC and VOR are the individual frequency components of the DTMF signal.

AC ELECTRICAL CHARACTERISTICS (All Voltages referenced to GND. VCC= 2.0 V to 5.5 V, TA = - 20 to +70°C) Guaranteed Limits Symbol Parameter Test Conditions Min Max Unit M/B = 1/2 30 35 TM Make Time (Figure 1) M/B = 2/3 38 42 M/B = 1/2 64 69 ms TB Break Time (Figure 1) M/B = 2/3 57 63 ms TIDP Inter Digit Pause Time (Figures 1,2,3) 800 850 ms TPAU Pause Time (Figures 3,5) 2.1 2.3 sec TROBK Auto-redial Break Time (Figure 4) 2.1 2.3 sec TD Delay time Key valid to Signal Output (Figures 1,2,3) 0 3.0 ms TKD Key-in Debounce (Figure 1) 20 25 ms TKRD Key-release Debounce 3.0 5.0 ms TKTD Key-in Tone Duration 21 25 ms TMFD Minimum Tone Duration Time (Figures 2,3) 92 96 ms TTIDP Minimum Tone Inter-digit Pause (Figure 2) 94 98 ms TMFDR Redial Tone Duration (Figure 2) 92 96 ms TTIDPR Redial Tone Inter-digit Duration (Figure 2) 94 98 ms Comparisons of Specified vs. Actual Tone Frequencies R/C Spec. Actual Error(%) Unit Conditions R1 697 699.1 +0.31 Hz R2 770 771.5 +0.19 Hz R3 852 852.3 +0.03 Hz R4 941 942.0 +0.10 Hz FOSC = 3.579 MHz C1 1209 1,215.7 +0.57 Hz C2 1336 1,331.7 -0.32 Hz C3 1477 1,471.9 -0.35 Hz

Figure 5. Flash Dialing (DTMF mode for example)

(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 NOTES: 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 2.54 7.62 Dimension, mm L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C