TS2411CDC3

TS2411 Tong Ringer DIP-8 Pin Definition: 1. VCC 5. Gnd 2. Rsl 6. Hfo 3. Lfi 7. Hfi 8. Out 4. Lfo General Description The TS2411 is a bipolar integrated circuit designed for telephone bell replacement. Features ● ● ● ● ● ● ● ● Designed for Telephone Bell Replacement Ordering Information Part No. TS2411CD C3 Low Current Drain Adjustable 2-frequency Tone Adjustable Warbling Rate Extension Tone Ringer Modules Alarms or Other Alerting Devices Adjustable for Reduced Supply Initiation Current. Built-in hysteresis prevents false triggering and rotary dial ‘Chirps’. Package DIP-8 Packing 50pcs / Tube Block Diagram 1 /7 Version: A08 TS2411 Tong Ringer Absolute Maximum Rating Parameter DC Supply Voltage (Referenced to GND) Power Dissipation in Still Air Plastic DIP Switch Collector Voltage Symbol VCC PD Tstg Value + 36 400 -65 to +150 Unit V mW o C Note: a. Maximum Ratings 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 Operating Voltage Symbol Vopr Min 13 Max 36 Unit V o Operating Temperature TA C -45 +65 Note: This device contains protection circuitry circuitry to guard against damage due to high static voltages or electric fidlds. 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 outputs must be left open. Electrical Specifications (Voltages Referenced to GND,TA=-0 to +70 oC) Parameter Initiation Supply Voltage (1) Initiation Supply Current (1) Sustaining Voltage (1) Sustaining Current High-Level Output Voltage Low-Level Output Voltage Symbol VSI ISI VSUS ISUS VOH VOL Test Conditions See Figure 2 See Figure 2 See Figure 2 See Figure 2 Vcc=21V,IOH=-15mA, Pin6=6V, Pin7=GND Vcc=21V,IOL=15mA, Pin6= GND, Pin7=6V Pin3 =6V, Pin4 =GND, Vcc=21V Pin7 =6V, Pin6 =GND, Vcc=21V R3 =191KΩ,C3 =6800pF R3 =191KΩ,C3 =6800pF R2 =165KΩ,C2 =0.47uF See Figure 1 Min 16.8 1.4 9.5 0.7 16.7 ---- Typ --------- Max 21.2 4.2 12.2 2.5 21.0 1.8 1.0 1.0 Unit V mA V mA V V μA μA HZ HZ HZ V Maximin Input Leakage Current IIN High Frequency 1 FH1 461 -563 High Frequency 2 FH2 576 -704 Low Frequency FL 9.0 -11.0 Ringing Start Voltage (4) Vtr --36 Notes : a. Initiation supply voltage (VSI) is the supply voltage required to start the tone ringer oscillating. b. Sustaining voltage (VSUS) is the supply voltage required to maintain oscillation. c. Ringing start voltage is the value of AC supply voltage required to start the tone ringer ringing in FIG.3 d. This product is not designed for protection against radioactive rays. e. All data and specifications are subject to change without notice. 2 /7 Version: A08 TS2411 Tong Ringer Application Circuit HOW TO USE THE RSL PIN In the IC, the supply initiation current (lsi) can be changed using the RSL Pin. As show is the diagram, the RSL (Pin 2) is grounded through resistor Rs. By changing the Rs value, supply initiation current can be changed. Supply voltage (Vcc) vs. supply current (lcc) characteristics resulting from changes in the value of Rs are shown in the following diagram. Figure 1. Ringing Start Voltage Test Circuit Figure 2. Test Circuit (1) 3 /7 Version: A08 TS2411 Tong Ringer Application Circuit SWITCH POSITION IS THE FOLLOWING TABLE: : PARAMETER Vsi , Isi Vsus , Isus Voh Vol SW1 1 1 2 2 SW2 1 1 2 3 R1 = 165 K (+/-) R2 = 191 K (+/-) C1 = 0.47 µF (+/-) 1% 1% 5% C2 = 0.0068 µF (+/-) 5% Figure 3. Test Circuit (2) SWITCH POSITION IS THE FOLLOWING TABLE: PARAMETER FL fH1 fH2 SW1 1 3 2 SW2 1 2 2 R1 = 165 K (+/-) 1% R2 = 191 K (+/-) 1% C1 = 0.47 µF (+/-) 5% C2 = 0.0068 µF (+/-) 5% Application Note The application circuit illustrates the use of the TS2411 devices in typical telephone or extension tone ringer application. The AC ringer signal voltage appears across the TIP and RING inputs of the circuit and is attenuated by capacitorC1 and resistor R1. C1 also provides isolation from DC voltages (48V) on the exchange line. After full wave rectification by the bridge diode, the waveform is filtered by capacitor C4 to provide a DC supply for the tone ringer chip. As this voltage exceeds the initiation voltage (VSI), oscillation starts. With the components shown, the output frequency chops between 512(fh1) and 640Hz(fh2) at a 10Hz(fL) rate. The loudspeaker load is coupled through a 1300W to 8W transformer. The output coupling capacitor C5 is required with transformer coupled loads. When driving a piezo-ceramic transducer type load, the coupling C5 and transformer (1300W:8W) are not required. However, a current limiting resistor is required. The low frequency oscillator oscillates at a rate (fL) controlled by an external resistor (R2) and capacitor (C2). The frequency can be determined using the relation fL=1/1.289R2*C2. The high frequency oscillates at a fH1, fH2 controlled by an external resistor (R3) and capacitor (C3). The frequency can be determined using the relation H1=1/1.504R3*C3, fH2=1/1.203R3*C3. 4 /7 Version: A08 TS2411 Tong Ringer Application Note Pin 2 allows connection of an external resistor RSL, which is used to program the slope of the supply current vs supply voltage characteristics (see Fig2), and hence the supply current up to the initiation voltage ( VSI ). This initiation voltage remains constant independent of RSL. The supply current drawn prior to triggering varies inversely with RSL, decreasing for increasing value of resistance. Thus, increasing the value of RSL will decrease the amount of AC ringing current required to trigger the device. As such, longer sucribser loops are possible since less voltage is dropped per unit length of loop wire due to the lower current level. RSL can also be used to compensate for smaller AC couplin capacitors (C5 on Fig 3) (higher impedance) to the line which can be used to alter the ringer equivalence number of a tone ringer circuit. The graph in Fig2 illustrates the variation of supply current with supply voltage. Three curves are drawn to show the variation of initiation current with RSL. Curve B( RSL=6.8KΩ) shows the I-V characteristic for the TS2411 tone ringer. Curve A is a plot with RSL