TS2418 Telephone tone ringer with bridge diode Supply Voltage 26V (max.) Calling Voltage (f=50Hz) Continuous General Description The TS2418 is a monolithic integrated circuit telephone tone ringer with bridge diode, when coupled with an appropriate transducer, it replaces the electromechanical bell. This 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. Features Ordering Information On chip high voltage full wave diode bridge rectifier. Low current consumption, in order to allow the parallel operation of the 4 devices. Part No. TS2418CD Operating Temp. o -20 ~ +70 C 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. Block Diagram TS2418 1-4 DIP-8 SOP-8 TS2418CS Package 2004/09 rev. A Absolute Maximum Rating Description Symbol Value Unit Calling Voltage (f=50Hz) Continuous VTP 120 Vrms Calling Voltage (f=50Hz) 5 Sec ON/10 Sec OFF VTP 200 Vrms Supply Current ICC 22 mA Operating Temperature TOP -20~+70 0 C -65~+150 0 C Storage and Junction Temperature Tstg Note: *Maximum Rating are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions. Recommended Operating Conditions Description Symbol Min Max Unit VCC -- 26 V Supply Voltage 0 -20 +70 Operating Temperature TA C Note: 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 output must be left open. Electrical Characteristics (Ta=25 C unless otherwise specified) 0 Parameter Symbol Test Conditions Min Typ Max Unit -- -- 26 V -- 1.5 1.8 mA 12.2 -- 13 V 8.0 -- 10 V Supply Voltage VCC Current Consumption without Load ICC Activation Voltage VON Activation Voltage Range VONR Sustaining Voltage VSUS 8.0 -- 8.8 V RD 6.4 -- -- KΩ Output Voltage Swing VOUT -- VCC-3 -- V Short Circuit Current IOUT -- 35 -- mA Differential Resistance in Off Condition Vs = 8.8 to 26V RA=1KΩ Vs=26V AC Operation VCC =26V,R1=14KΩ Output Frequency fH1 fH1 VCC =0V 2300 Hz fH2 fH2 VCC =6V 1700 Hz fH1 Range Sweep Frequency TS2418 fL 2-4 R1=27KΩ to 1.7 KΩ 0.1 -- 15 KHz R1=14KΩ,C1=100nF -- 10 -- Hz 2004/09 rev. A Test and Application Circuit . Description: The TS2418 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 f frequency oscillator. To protect the IC from telephone line transients, a zener Diode is included. TS2418 3-4 2004/09 rev. A SOP-8 Mechanical Drawing A DIM 9 16 B 1 P 8 G R C M F D A B C D F G K M P R SOP-8 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 4.80 5.00 0.189 0.196 3.80 4.00 0.150 0.157 1.35 1.75 0.054 0.068 0.35 0.49 0.014 0.019 0.40 1.25 0.016 0.049 1.27 (typ) 0.05 (typ) 0.10 0.25 0.004 0.009 0o 7o 0o 7o 5.80 6.20 0.229 0.244 0.25 0.50 0.010 0.019 K DIP-8 Mechanical Drawing A 8 DIM 5 B 4 1 L C J A B C D G J K L M DIP-8 DIMENSION MILLIMETERS INCHES MIN MAX MIN MAX 9.07 9.32 0.357 0.367 6.22 6.48 0.245 0.255 3.18 4.45 0.125 0.135 0.35 0.55 0.019 0.020 2.54 (typ) 0.10 (typ) 0.29 0.31 0.011 0.012 3.25 3.35 0.128 0.132 7.75 8.00 0.305 0.315 10o 10o K G TS2418 D M 4-4 2004/09 rev. A