IL6840A IKSEMICON | Alldatasheet

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Technical content

Rev. 00 Telephone Tone Ringer with Bridge Diode The IL6840A is a monolithic integrated circuit tele phone tone ringer with bridge diode, when coupled with an appropriate tran sducer, it replaces the electro-mechanical bell. The device is designed for use with either a piezo transducer or an inexpensive transformer coupled sp eaker to produce a pleasing tone composed of a high frequency (f R) alternating with a low frequency (f L) resulting in a warble frequency. The supply volta ge 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 IL6840A

ORDERING INFORMATION

TA = -40 ° to 70 ° C for package PIN ASSIGNMENT OUT OUT BLOCK DIAGRAM

Rev. 00 MAXIMUM RATINGS * (T A = 25 °C) Symbol Parameter Value Unit VTP Calling Voltage (f = 50 Hz) Continuous 120 Vrms VTP Calling Voltage (f = 50 Hz) 5 Sec ON/10 Sec OFF 20 0 Vrms ICC Supply Current 22 mA Tstg Storage and Junction Temperature -60 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. RECOMMENDED OPERATING CONDITIONS Symbol Parameter Min Max Unit VCC Supply Voltage 26 V TA Operating Temperature -40 +70 °C This device contains protection circuitry to guard against damage due to high static voltages or elect ric fields. However, precautions must be taken to avoid applica tions of any voltage higher than maximum rated volt ages to this high-impedance circuit. For proper operation, V IN and V OUT should be constrained to the range GND ≤ (V IN 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 (T A = 25 °C) Guaranteed Limits Symbol Parameter Test Conditions Min Max Unit ICC Current Consumption without Load VS=8.8 to 26 V 1.8 mA VON Activiation Voltage 12.2 13 V VONR Activiation Voltage Range RA = 1 K Ω 8 10 V VSUS Sustaining Voltage 8 8.8 V RD Differential Resistance in Off Condition VTIP = 8.0 V VRING = 0 V 6.4 3500 KΩ VOUT Output Voltage Swing V S = 26 V, VSRC = 8.0 V, VOFR = 8.0 V 21 25.5 V IOUT Short Circuit Current V S = 26 V 30 80 mA

Rev. 00 AC CHARACTERISTICS Guaranteed Limits Symbol Parameter Test Conditions Min Max Unit fH1 fH2 Output Frequencies f fH2 VCC = 26 V, R1 = 14 K Ω VSCR = 0 V V SCR = 6 V 1960 1420 2570 1840 Hz Hz fH Range max VCC = 26 V, R1 = 1.7 K Ω , VSCR = 0 V

14 KHz

fH Range min VCC = 26 V, R1 = 27 K Ω , VSCR = 6.0 V

0.11 KHz

fL Sweep Frequency V CC = 26 V, C 1 = 100 nF 7.0 13.0 Hz TEST AND APPLICATION CIRCUIT Figure1 : Single output applied pin#5 f1 = 3.22 • 10 4 / R 1 (K Ω ); f 2 = 5/7 f 1; f sweep = 1000 / C 1(nF) RING TIP 1 F, 250V AC 2.2 K 10 F 0.22 F 100nF 14K 10K 10K C 3 C 2 C 1 R 1 R 2 VO U T IL6840A TEL VS Piezo 1300:8 1 2 3 4 5 6

Rev. 00 Figure2 : Single output applied pin#6 f1 = 3.22 • 10 4 / R 1 (K Ω ); f 2 = 5/7 f 1; f sweep = 1000 / C 1(nF)

DESCRIPTION

The IL6840A 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 gener ated are switched by internal oscillator in a fast sequence and made audible across an output amplifier in the loudspeak er; both tone frequencies and the switching frequen cy can be externally adjusted. The device can drive either directly a piezo cerami c converter (buzzer) or small loudspeaker. In case of using a loud-speaker, a transformer is needed. An internal shunt voltage regulator provides DC vol tage to the output stage, low frequency oscillator, and high frequency oscillator. To protect the IC from telephone line transients, a zener Diode is included. RING TIP 1 F, 250V AC 2.2 K 10 F 0.22 F 100nF 14K 10K 10K C 3 C 2 C 1 R 1 R 2 VO U T IL6840A TEL VS Piezo 1300:8 1 2 3 4 5 6

Rev. 00 N SUFFIX PLASTIC DIP (MS – 001BA) Symbol MIN MAX A 8.51 10.16 B 6.10 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 NOTE S: L 7.62 8.26 Dimensions “A”, “B” do not include mold flash or pr otrusions. M 0.20 0.36 Maximum mold flash or protrusions 0.25 mm (0.010) per side. N 0.38 D SUFFIX SOIC (MS - 012AA) Symbol MIN MAX A 4.80 5.00 B 3.80 4.00 C 1.35 1.75 D 0.33 0.51 F 0.40 1.27 G H J 0° 8° NOTE S: K 0.10 0.25 Dimensions A and B do not include mold flash or pro trusion. M 0.19 0.25 1.27 5.72 Dimension, mm Dimension, mm 2.54 7.62 A BH C K C M J F M P G D R x 45 SEA TING PLANE 0.25 (0.010) M T -T- L H M J A B F G D SEATING PLANE N K 0.25 (0.010) M T -T- C