IL9151-3 INTEGRAL | Alldatasheet

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ORDERING INFORMATION

TA = -20° to 70° C for package 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 t elephone l ines. C MOS t echnology i s used t o produced this device, resulting in very l ow power requi rements and hi gh noi se i mmunity. 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 PIN ASSIGNMENT KEYBOARD ASSIGNMENT R1 1 2 3 R2 4 5 6 R3 7 8 9 R4 * 0 # C1 C2 C3 (*,# : Redial) LOGIC DIAGRAM PIN 5 = VCC PIN 12 = GND

PIN No. NAME DESCRIPTION R1~R4 C1~C3 Key inputs. These inputs can be interfaced to either an XY m atrix keyboard or a 2 of 7 type keyboard. The keypad inputs are normally held at high. When a key is depressed, scanning signals are present ed at C1, C2, and C 3 inputs; the dialer identifies the key by examining the R1~R4 inputs. Debouncing is provided to avoid false entry. VCC GND Positive power supply input. Negative power supply input. CK1,CK, CK Oscillator circuit input/output. The oscillator consists of two inverters, with oscillator frequency controlled by external RC components: RCK1=270KΩ, RCK=150KΩ, CCK=150 pF 9 __ DP Dialing pulse output. This output consists of an N-channel open drain device. Normally this output will be in off st ate during make and on duri ng break. Di aling pulse rate = 10pps and inter-digital pause = 800 ms when FOSC=18KHz in normal mode. 10 M/B Make/Break ratio select input. 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 __ HK 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) 13 MUTE Mute output. This out put i s an i nverter norm ally at low state when there is no key entry. During outdialing it changes to high state and is used to mute the speech network.

MAXIMUM RATINGS* Symbol Parameter Value Unit VCC DC Supply Voltage (Referenced to GND) -0.3 to +5.5 V VIN DC Input Voltage (Referenced to GND) -0.3 to VCC +0.3 V PD Power Dissipation in Still Air , Plastic DIP** 600 mW Tstg Storage Temperature -55 to +150 °C TL Lead Temperature, 1mm from case for 10 seconds 260 °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 TA Operating Temperature -10 +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 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 VCC VCC VIL Max Low-Level Input Voltage GND 0.2VCC IIN Max. Input Leakage Current VCC=5.5V ±1.0 µA

AC ELECTRICAL CHARACTERISTICS (FOSC = 18 KHz, VCC=2.0 to 5.5 V, TA=-20 to +70°C ) Symbol Parameter Test Conditions Guaranteed Limit Unit Min. Typ. Max M/B Make/Break M/B=VCC 1/2 Ratio M/B=GND 2/3 DR Dial Pulse FOSC=18KHz 10 pps Rate FOSC=36KHz 20 Maximum 10pps 1/2 33 TM Make Time 10pps 2/3 40 ms (Figure 3) 20pps 1/2 16.6 20pps 2/3 20 Maximum 10pps 1/2 66 TB Break Time 10pps 2/3 60 (Figure 3) 20pps 1/2 33 20pps 2/3 30 Maximum 10pps 1/2 800 TIDP Inter-digital 10pps 2/3 800 Pause Time 20pps 1/2 400 (Figure 3) 20pps 2/3 400 Maximum 10pps 1/2 800 TPDP Pre-digital 10pps 2/3 800 Pause 20pps 1/2 400 (Figure 3) 20pps 2/3 400 Maximum 10pps 1/2 33 TMDP Mute Delay 10pps 2/3 40 Time 20pps 1/2 16.6 (Figure 3) 20pps 2/3 20 TKD Minimum Key Debounce Time VIN=GND or VCC

(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 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