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| SL2410 Tone Ringer The SL2410 is a bipolar integrated circuit designed for telephone bell replacement. * Designed for Telephone Bell Replacement * Low Curent Drain * Adjustable 2-frequency Tone * Adjustable Warbling Rate * Extension Tone Ringer Modules * Alarms or Other Alerting Devices * External Triggering or Ringer Disable * Built-in hysteresis prevents false triggering and rotary dial `Chirps' ORDERING INFORMATION SL2410N Plastic SL2410D SOIC TA = -45 to 65 C for package LOGIC DIAGRAM PIN ASSIGNMENT PIN 1 = VCC PIN 5 = GND 1. 2. 3. 4. Output amplifier High frequency oscillator Low frequency oscillator Hysteresis regulator (Regulator circuit has built-in hysteresis to prevent false triggering and rotary dial "Chirps") SLS System Logic Semiconductor SL2410 PIN DESCRIPTION NAME VCC RE LFI LF0 GND HF0 HFI OUT PIN 1 2 3 4 5 6 7 8 Positive power supply. Initiation of oscillation start input Low frequency oscillator input Low frequency oscillator output Negative power supply High frequency oscillator output High frequency oscillator input Tone output DESCRIPTION MAXIMUM RATINGS * Symbol VCC PD Tstg * Parameter DC Supply Voltage (Referenced to GND) Power Dissipation in Still Air, Plastic DIP Storage Temperature Value to +30.0 400 -65 to +150 Unit V mW 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 Parameter DC Supply Voltage (Referenced to GND) Operating Temperature Min 13.0 -45 Max 29.0 +65 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. SLS System Logic Semiconductor SL2410 ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND, TA = -45 to +65C) Guaranteed Limits Symbol VSI ISI VSUS ISUS VTR ITR VDIS IDIS VOH VOL IIN Parameter Initiation Supply Voltage (1) Initiation Supply Current (1) Sustaining Voltage (2) Sustaining Current (2) Trigger Voltage (3) Trigger Current (3,5) Disable Voltage (4) Disable Current (4) High-Level Output Voltage Low-Level Output Voltage Maximun Input Leakage Current (Pin 3) (Pin 7) fH1 fH2 fL High Frequency 1 High Frequency 2 Low Frequency See Fig. 1 No Load VCC=VSUS See Fig. 1 VCC=15V VCC=15V VCC=21V VCC=15V VCC=21V, IOH=-15mA, Pin 6=6V, Pin 7=GND VCC=21V, IOL=15mA, Pin 6=GND, Pin 7=6V Pin 3=6V, Pin 4=GND, VCC=21V Pin 7=6V, Pin 6=GND, VCC=21V R3=191K,C3=6800pF R3=191K,C3=6800pF R2=165K, C2=0.47F Test Conditions See Fig. 1 Min 16.8 1.4 9.5 0.7 8.8 5.0 -20 16.7 461 576 9.0 Typ Max 21.2 4.2 12.2 2.5 12.2 1000 0.7 21.0 1.8 1.0 1.0 563 704 11.0 Unit V mA V mA V A V A V V A A Hz Hz Hz Notes: 1. Initiation supply voltage (VSI ) is the supply voltage required to start the tone ringer oscillating. 2. Sustaining voltage (VSUS) is the supply voltage required to maintain oscillation. 3. VTR and ITR are the conditions applied to trigger in to start oscillation for VSUSVCCVSI . 4. VDIS and IDIS are the conditions applied to trigger in to inhibit oscillation for VSI VCC. 5. Trigger current must be limited to this value ext ernally. SLS System Logic Semiconductor SL2410 CIRCUIT CURRENT-SUPPLY VOLTAGE (NO LOAD) Figure 1 APPLICATION CIRCUIT Figure 2 SLS System Logic Semiconductor SL2410 APPLICATION NOTE The application circuit illustrates the use of the SL2410 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 capacitor C1 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 ouptut frequency chops between 512(fh1) and 640Hz(fh2) at a 10Hz(fL) rate. The loudspeaker load is coupled through a 1300 to 8 ransformer. The output coupling capacitor C5 is required with transformer coupled loads. When driving a piezo-ceramic transducer type load, the coupling C5 and transformer (1300:8) 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=1/1.289R2xC2. 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 fH1=1/1.504R3xC3, fH2=1/1.203R3xC3. TRIGGERING SL2410 FROM CMOS OR TTL LOGIC Figure 3 Figure 4 SLS System Logic Semiconductor SL2410 EQUIVALENT CIRCUIT (Pin 2 Input) INHIVITING OSCILLATION Figure 5 Figure 6 PROGRAMMING THE SL2410 INITIATION SUPPLY VOLTAGE Figure 7 Figure 8 SLS System Logic Semiconductor |
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