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TS2418 Series
Telephone Tone Ringer with Bridge Diode
SOP-8 DIP-8
Pin Definition: 1. Ring 5. TIP 2. Ground 7. RC 3. SRC 6. AVA 4. OFC 5. Output
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
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
Part No.
TS2418CD C3 TS2418CS RL
Package
DIP-8 SOP-8
Packing
50pcs / Tube 2.5Kpcs / 13" Reel
Block Diagram
1/6
Version: A07
TS2418 Series
Telephone Tone Ringer with Bridge Diode
Absolute Maximum Rating
Parameter
Calling Voltage (f=50Hz) Continuous Calling Voltage (f=50Hz) 5 Sec ON/10 Sec OFF Supply Current Operating Temperature
Symbol
VTP VTP ICC TOP
Value
120 200 22 0~+70
Unit
Vrms Vrms mA
0 0
C C
Storage and Junction Temperature Tstg -65~+150 Note: a. Maximum Rating are those values beyond which damage to the device may occur. b. Functional operation should be restricted to the Recommended Operating Conditions.
Recommended Operating Conditions
Description
Supply Voltage Operating Temperature
Symbol
VCC TA
Min
--20
Max
26 +70
Unit
V
0
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 Specifications (Ta = 25oC, unless otherwise noted)
Parameter
Supply Voltage Current Consumption without Load Activation Voltage Activation Voltage Range Sustaining Voltage Differential Resistance in Off Condition Output Voltage Swing Short Circuit Current AC Operation Output Frequency fH1 fH2 fH1 Range Sweep Frequency fL fH1 fH2 VCC =26V,R1=14K VSCR =0V VSCR =6V R1=27K to 1.7 K R1=14K,C1=100nF --0.1 -2300 1700 -10 --15 -Hz Hz KHz Hz
Symbol
VCC ICC VON VONR VSUS RD VOUT IOUT
Test Conditions
Vs = 8.8 to 26V RA=1K
Min
--12.2 8.0 8.0 6.4 --
Typ
-1.5 ----VCC-3 35
Max
26 1.8 13 10 8.8 ----
Unit
V mA V V V K V mA
Vs=26V
--
2/6
Version: A07
TS2418 Series
Telephone Tone Ringer with Bridge Diode
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 loudspeaker, 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.
3/6
Version: A07
TS2418 Series
Telephone Tone Ringer with Bridge Diode
SOP-8 Mechanical Drawing
DIM 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 1.27BSC 0.05BSC 0.10 0.25 0.004 0.009 0 7 0 7 5.80 6.20 0.229 0.244 0.25 0.50 0.010 0.019
4/6
Version: A07
TS2418 Series
Telephone Tone Ringer with Bridge Diode
DIP-8 Mechanical Drawing
DIM 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 o o 10 10
5/6
Version: A07
TS2418 Series
Telephone Tone Ringer with Bridge Diode
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, to any intellectual property rights is granted by this document. Except as provided in TSC's terms and conditions of sale for such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for any damages resulting from such improper use or sale. 6/6 Version: A07

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