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TECHNICAL DATA IL2418 Telephone Tone Ringer with Bridge Diode The IL2418 is a monolithic integrated circuit telephone tone ringer with bridge diode, when coupled with an appropriate transducer, it replaces the electro-mechanical bell. The device is designed for use with either a piezo transducer or an inexpensive transformer coupled speaker to produce a pleasing tone composed of a high frequency (fR) alternating with a low frequency (fL) resulting in a warble frequency. The supply voltage is obtained from the AC ring signal and the circuit is designed so that noise on the line or variation of the ringing signal can not affect correct operation of the device. * On chip high voltage full wave diode bridge rectifier * Low current consumption, in order to allow the parallel operation of the 4 devices * Low external component count * Tone and switching frequencies adjustable by external components * High noise immunity due to built-in voltage-current hysteresis * Activation voltage adjustable * Internal zener diodes to protect against over voltages * Ringer impedance adjustable with external components ORDERING INFORMATION IL2418N Plastic TA = -20 to 70 C for package PIN ASSIGNMENT BLOCK DIAGRAM 1 IL2418 MAXIMUM RATINGS * (TA = 25C) Symbol VTP VTP ICC Tstg * Parameter Calling Voltage (f = 50 Hz) Continuous Calling Voltage (f = 50 Hz) 5 Sec ON/10 Sec OFF Supply Current Storage and Junction Temperature Value 120 200 22 -65 to +150 Unit Vrms Vrms mA C Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. RECOMMENDED OPERATING CONDITIONS Symbol VCC TA Supply Voltage Operating Temperature -20 Parameter Min Max 26 +70 Unit V 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 V ). CC Unused outputs must be left open. ELECTRICAL CHARACTERISTICS(TA = 25C) Guaranteed Limits Symbol Parameter Test Conditions Min ICC VON VONR VSUS RD VOUT IOUT Current Consumption without Load Activiation Voltage Activiation Voltage Range Sustaining Voltage Differential Resistance in Off Condition Output Voltage Swing Short Circuit Current VS = 26 V RA = 1 K VS=8.8 to 26 V 12.2 8 8 6.4 VCC-3 35 Typ Max 1.8 13 10 8.8 mA V V V K V mA Unit 2 IL2418 AC CHARACTERISTICS Guaranteed Limits Symbol Parameter Test Conditions Min fH1 fH2 Output Frequencies fH1 fH2 fH1 Range fL Sweep Frequency VCC = 26 V, R1 = 14 K VCC = 0 V VCC = 6 V R1 = 27 K to 1.7 K R1 = 14 K, C1 = 100 nF 0.1 10 Typ 2300 1700 15 Max Hz Hz KHz Hz Unit TEST AND APPLICATION CIRCUIT 1 F, 250VAC TIP C2 2.2 K R2 Ra 0.22 F 10K 8 TEL LINE C3 10 F 7 1 6 5 Piezo 4 10K IL2418 2 3 VOUT 1300:8 RING C1 100nF VS R1 12K f1 = 3.22 *104 / R1 (K); f2 = 5/7 f1; fsweep = 1000 / C1(nF) DESCRIPTION The IL2418 tone ringer derives its power supply by rectifying the AC ringing signal. It uses this power to activate two tone generators. The two tone frequencies generated are switched by internal oscillator in a fast sequence and made audible across an output amplifier in the loudspeaker; both tone frequencies and the switching frequency can be externally adjusted. The device can drive either directly a piezo ceramic converter (buzzer) or small loudspeaker. In case of using a loud-speaker, a transformer is needed. An internal shunt voltage regulator provides DC voltage to the output stage, low frequency oscillator, and high frequency oscillator. To protect the IC from telephone line transients, a zener Diode is included. 3 IL2418 CHIP DIAGRAM 2.43 + 0.03 07 2.20 + 0.03 06 05 08 04 01 03 02 (0,0) Chip marking Chip making (X=2,283, Y=0,165) Size pad: 0.12 x 0.12 mm 20 PAD LOCATION Pad No 01 02 03 04 05 06 07 08 Symbol RING GND SPC OFR OUT AVA RC TIP X 0.220 0.920 1.630 2.075 2.090 1.150 0.519 0.220 Y 0.590 0.100 0.230 0.810 1.620 1.820 1.890 1.310 Pad size is given as per metallization layer 4 IL2418 5 |
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