TECHNICAL DATA IL9151-3 PULSE DIALER The IL9151-3 pulse dialer is a monolithic CMOS integrated circuit which converts pushbutton inputs to a series of pulses suitable for telephone dialing. It is intended to replace mechanical telephone dialers and can operate directly from telephone lines. CMOS technology is used to produced this device, resulting in very low power requirements and high noise immunity. The IL9151-3 can be easily interfaced with a variety of telephones, requiring only a minimal number of external components. • Direct telephone line operation • 4 x 3 matrix keyboard interface • Supply voltage range of 2.0 to 5.5 volts • Inexpensive RC oscillator • Low power standby mode for redialing • 22-digit redial memory • Redial with either * or # key • Dialer reset for line power breaks > 200 ms • Selectable make/break ratio • High speed test capacity ORDERING INFORMATION IL9151-3N Plastic TA = -20° to 70° C for package PIN ASSIGNMENT LOGIC DIAGRAM KEYBOARD ASSIGNMENT R1 R2 R3 R4 PIN 5 = VCC PIN 12 = GND 1 2 3 4 5 6 7 8 9 * 0 # C1 C2 C3 (*,# : Redial) IL9151-3 PIN DESCRIPTION PIN No. NAME 1 2 3 4 R1~R4 Key inputs. 14 15 16 C1~C3 These inputs can be interfaced to either an XY matrix keyboard or a 2 of 7 type keyboard. The keypad inputs are normally held at high. When a key is depressed, scanning signals are presented at C1, C2, and C3 inputs; the dialer identifies the key by examining the R1~R4 inputs. Debouncing is provided to avoid false entry. 5 12 VCC GND Positive power supply input. Negative power supply input. 6 7 8 CK1,CK, CK Oscillator circuit input/output. DESCRIPTION The oscillator consists of two inverters, with oscillator frequency controlled by external RC components: RCK1=270KΩ, RCK=150KΩ, CCK=150 pF 9 10 __ DP Dialing pulse output. M/B Make/Break ratio select input. This output consists of an N-channel open drain device. Normally this output will be in off state during make and on during break. Dialing pulse rate = 10pps and inter-digital pause = 800 ms when FOSC=18KHz in normal mode. In normal mode, this input is used to select the Make/Break ratio: when input = VCC , M/B ratio = 1/2. when input = GND, M/B ratio = 2/3. when connected to the clock output (pin 7), this input can trigger the IN9151-3 into test mode, generating high speed dialing. 11 13 __ HK MUTE Hook switch input. This input is used to detect whether the telephone is in the On-Hook or Off-Hook state: VCC=on-hook GND=off-hook. (Resetting time = 200 ms minimum) Mute output. This output is an inverter normally at low state when there is no key entry. During outdialing it changes to high state and is used to mute the speech network. IL9151-3 MAXIMUM RATINGS* Symbol Parameter VCC DC Supply Voltage (Referenced to GND) VIN DC Input Voltage (Referenced to GND) PD Tstg TL Value Unit -0.3 to +5.5 V -0.3 to VCC +0.3 V 600 mW -55 to +150 °C 260 °C ** Power Dissipation in Still Air , Plastic DIP Storage Temperature Lead Temperature, 1mm from case for 10 seconds * 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 VCC DC Supply Voltage (Referenced to GND) VIN DC Input Voltage (Referenced to GND) TA Operating Temperature Min Max Unit 2.0 5.5 V 0 VCC V -10 +70 °C This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this high-impedance circuit. For proper operation, VIN and VOUT should be constrained to the range GND≤(VIN or VOUT)≤VCC. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused outputs must be left open. DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND, VCC = 2.0 V to5.5 V, TA = -20 to +70°C) Guaranteed Limits Symbol Parameter Test Conditions Min Max Unit IMR Maximum Memory Retention Current VCC=1.0 V, HK=VCC ,all outputs unloaded 1 µA ICC Maximum Supply Operating Current oscillator running, all outputs unloaded 200 µA ISB Maximum Standby Current all outputs unload HK=VCC 4 µA IOL Minimum Output Sink Current (Mute, DP) VCC=2.0V, VOUT=0.5V, f=18KHz 2 mA IOH Minimum Output Drive Current (Mute) VCC=2.0V, VOUT=VCC-1V, f=18KHz 1 mA VIL Min High-Level Input Voltage 0.8VCC VIL Max Low-Level Input Voltage GND IIN Max. Input Leakage Current VCC=5.5V VCC VCC 0.2VCC ±1.0 µA IL9151-3 AC ELECTRICAL CHARACTERISTICS (FOSC = 18 KHz, VCC=2.0 to 5.5 V, TA=-20 to +70°C ) Symbol Parameter Test Conditions Min. M/B DR TM TB TIDP TPDP TMDP TKD Make/Break Ratio Dial Pulse Rate Maximum Make Time (Figure 3) Maximum Break Time (Figure 3) Maximum Inter-digital Pause Time (Figure 3) Maximum Pre-digital Pause (Figure 3) Maximum Mute Delay Time (Figure 3) Minimum Key Debounce Time M/B=VCC M/B=GND FOSC=18KHz FOSC=36KHz 10pps 10pps 20pps 20pps 10pps 10pps 20pps 20pps 10pps 10pps 20pps 20pps 10pps 10pps 20pps 20pps 10pps 10pps 20pps 20pps VIN=GND or VCC 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 1/2 2/3 30 Guaranteed Limit Typ. 1/2 2/3 10 20 Unit Max pps 33 40 16.6 20 66 60 33 30 800 800 400 400 800 800 400 400 33 40 16.6 20 ms IL9151-3 Operation Procedures Symbol Definitions: DP: pulse digit (0 through 9) ZiZiZi: conversation 0-0↑: off-hook. 0-0↓: on-hook. * or # : Redial Recommended Operations: Normal Dialing: 0-0↑; DP ... DP; ZiZiZi; 0-0↓ Dial pulse begins as soon as first key is entered. Debounced and detected on chip. Redialing: 0-0↑; * or # key (* or # key can be accepted as first key entry after OffHook.) Functional Description 1) N-channel open drain output - DP (Figure 1). 2) Clock oscillator The clock oscillator consists of two inverters, with the frequency of oscillation controlled by external components connected to pins 6,7, and 8. The circuit is sufficiently versatile to allow the use of a variety of external component configurations. The oscillator circuit is shown in figure 2. Figure 1 Figure 2 IL9151-3 SWITCHING WAVEFORMS EXPANDED LOGIC DIAGRAM IL9151-3 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 5.33 C F L C D 0.36 0.56 F 1.14 1.78 G 2.54 H 7.62 -T- SEATING PLANE N G K M D H 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 J 0° 10° K 2.92 3.81 L 7.62 8.26 M 0.2 0.36 N 0.38