Telephone Tone Ringer Bipolar Linear/I2L

Freescale Semiconductor Technical Data MC34017A Rev 3.0, 3/2006 Telephone Tone Ringer Bipolar Linear/I2L Features • Complete Telephone Bell Replacement Circuit with Minimum External Components • On-Chip Diode Bridge and Transient Protection • Direct Drive for Piezoelectric Transducers • Push Pull Output Stage for Greater Output Power Capability • Base Frequency Options • 34017A-1: 1.0 kHz • 34017A-2: 2.0 kHz • 34017A-3: 500 Hz • Input Impedance Signature Meets Bell and EIA Standards • Rejects Rotary Dial Transient 34017A TELEPHONE TONE RINGER BIPOLAR LINEAR/I2 D SUFFIX 98A42564B 8-LEAD SOIC P SUFFIX 98A42420B 8-LEAD DIP ORDERING INFORMATION Device MC34017AD/DR2 MC34017AP www.DataSheet4U.com Temperature Range (TA) -20°C to 60°C Package 8 SOIC 8 Plastic DIP 160 K C 15 K 8 7 AC2 RG Ring 34017A Tip 1.0 mF 6.8 K AC1 R01 R02 RI 1 2 3 4 6 RC 5 RS + 2.2 mF 3.0 V 5.0 mF 25 V 34017A-1: C=1000 pF 34017A-2: C=500 pF 34017A-3: C=2000 pF Piezo Sound Element This device contains 97 active transistors and 79 gates Figure 1. 34017A Simplified Application Diagram There are no disclaimers required on the Final publication of a data sheet. © Freescale Semiconductor, Inc., 2006. All rights reserved. INTERNAL BLOCK DIAGRAM INTERNAL BLOCK DIAGRAM Figure 2. 34017A Simplified Internal Block Diagram 34017A 2 Analog Integrated Circuit Device Data Freescale Semiconductor TERMINAL CONNECTIONS TERMINAL CONNECTIONS AC1 R01 R02 RI 1 1 8 7 6 5 AC2 RG RC RS 2 3 4 Figure 3. 34017A Terminal Connections Table 1. 34017A Terminal Definitions Terminal Number 1, 8 5 Terminal Name AC1, AC2 RS Terminal Function Formal Name Definition The input terminals to the full-wave diode bridge. The AC ringing signal from the telephone line energizes the ringer through this bridge. The input of the threshold comparator to which diode bridge current is mirrored and sensed through an external resistor (R3). Nominal threshold is 1.2 V. This Terminal internally clamps at 1.5 V. The positive supply terminal for the oscillator, frequency divider, and output buffer circuits. The tone ringer output terminals through which the sound element is driven. The negative terminal of the diode bridge and the negative supply terminal of the tone generating circuitry. The oscillator terminal for the external resistor and capacitor which control the tone ringer frequencies (R2, C2). 4 2, 3 7 6 RI RO1, RO2 RG RC 34017A Analog Integrated Circuit Device Data Freescale Semiconductor 3 MAXIMUM RATINGS MAXIMUM RATINGS Table 2. Maximum Ratings All voltages are with respect to RG, Terminal 7, unless otherwise noted. ESD voltage data is available upon request. Rating Operating AC Input Current (Terminals 1, 8) Transient Input Current (Terminals 1, 8) (T < 2.0 ms) Voltage Applied at RC (Terminal 6) Voltage Applied at RS (Terminal 5) Voltage Applied to Outputs (Terminals 2, 3) Power Dissipation (@ 25°C) Operating Ambient Temperature Storage Temperature Symbol – VIN VRC VRS VO PD TA TSTG Value 20 ±300 5.0 5.0 -2.0 to VRI 1.0 -20 to 60 -65 to 150 Unit mA, RMS mA, peak V V V W °C °C 34017A 4 Analog Integrated Circuit Device Data Freescale Semiconductor STATIC ELECTRICAL CHARACTERISTICS STATIC ELECTRICAL CHARACTERISTICS Table 3. Static Electrical Characteristics Typical values noted reflect the approximate parameter mean at TA = 25°C under nominal conditions unless otherwise noted. Characteristic Ringing Start Voltage VSTART = VI at Ring Start VI > 0 (Test 1a) VI < 0 (Test 1b) Ringing Stop Voltage (Test 1c) VSTOP = VI at Ring Stop 34017A-1 34017A-2 34017A-3 Output Frequencies (VI = 50 V) (Test 1d) 34017A-1 High Tone Low Tone Warble Tone 34017A-2 High Tone Low Tone Warble Tone 34017A-3 High Tone Low Tone Warble Tone Output Voltage (VI = 50 V) (Test 6) Output Short – Circuit Current (Test 2) Input Diode Voltage (II = 5.0 mA) (Test 3) Input Voltage – SCR OFF (II = 30 mA) (Test 4a) Input Voltage – SCR ON (II = 100 mA) (Test 4b) RS Clamp Voltage (VI = 50 V) (Test 5) fH fL fW fH fL fW fH fL fW VO IRO1, IRO2 VD VOFF VON VCLAMP 937 752 11.5 1874 1504 11.5 937 752 23 34 35 5.4 30 3.2 1.3 1010 808 12.5 2020 1616 12.5 1010 808 25 37 60 6.2 38 4.1 1.5 1083 868 14 2166 1736 14 1083 868 28 43 80 6.8 43 6.0 1.8 VPP mAPP VDC VDC VDC VDC Hz VSTART (+) VSTART (–) 34 -34 37.5 -37.5 41 -41 Symbol Min Typ Max Unit VDC VSTOP 14 12 14 16 14 16 22 20 22 VDC 34017A Analog Integrated Circuit Device Data Freescale Semiconductor 5 STATIC ELECTRICAL CHARACTERISTICS APPLICATION CIRCUIT PERFORMANCE Refer to Typical Application. Characteristic Output Tone Frequencies 34017A-1 34017A-2 34017A-3 Warble Frequencies Output Voltage (VI ≥ 60 VRMS, 20 Hz) Output Duty Cycle Ringing Start Input Voltage (20 Hz) Ringing Stop Input Voltage (20 Hz) Maximum AC Input Voltage (≤ 68 Hz) Impedance When Ringing VI = 40 VRMS, 15 Hz VI = 130 VRMS, 23 Hz Impedance When Not Ringing VI = 10 VRMS, 24 Hz VI = 2.5 VRMS, 24 Hz VI = 10 VRMS, 5.0 Hz VI = 3.0 VRMS, 200 to 3200 Hz Maximum Transient Input Voltage (T ≤ 2.0 ms) Ringer Equivalence Class A Class B 0.5 0.9 – – 28 > 1.0 55 > 200 1500 kΩ MΩ kΩ kΩ V >16 12 808/1010 1616/2020 404/505 12.5 37 50 36 21 150 VPP % VRMS VRMS VRMS kΩ Typ Unit Hz 34017A 6 Analog Integrated Circuit Device Data Freescale Semiconductor TYPICAL APPLICATIONS INTRODUCTION TYPICAL APPLICATIONS INTRODUCTION The 34017A Tone Ringer derives its power supply by rectifying the AC ringing signal. It uses this power to activate a tone generator and drive a piezo-ceramic transducer. The tone generation circuitry includes a relaxation oscillator and frequency dividers which produce high and low frequency tones as well as the tone warble frequency. The relaxation oscillator frequency fO is set by resistor R2 and capacitor C2 connected to Terminal RC. The oscillator will operate with fO from 1.0 kHz to 10 kHz with the proper choice of external components (see Figure 2). The frequency of the tone ringer output signal at RO1 and RO2 alternates between fO/4 to fO/5. The warble rate at which the frequency changes is fO/320 for the 34017A-1, fO/640 for the 34017A-2 and fO/160 for the 34017A-3. With a 4.0 kHz oscillator frequency, the 34017A-1 produces 800 Hz and 1000 Hz tones with a 12.5 Hz warble rate. The 34017A-2 generates 1600 Hz and 2000 Hz tones with a similar 12.5 Hz warble frequency from an 8.0 kHz oscillator frequency. The 34017A-3 will produce 400 Hz and 500 Hz tones with a 12.5 Hz warble rate from a 2.0 kHz oscillator frequency. The tone ringer output circuit can source or sink 20 mA with an output voltage swing of 37 V peak-to-peak. Volume control is readily implemented by adding a variable resistance in series with the piezo transducer. Input signal detection circuitry activates the tone ringer output when the AC line voltage exceeds programmed threshold level. Resistor R3 determines the ringing signal amplitude at which an output signal at RO1 and RO2 will be generated. The AC ringing signal is rectified by the internal diode bridge. The rectified input signal produces a voltage across R3 which is referenced to RG. The voltage across resistor R3 is filtered by capacitor C3 at the input to the threshold circuit. When the voltage on capacitor C3 exceeds 1.2 V, the threshold comparator enables the tone ringer output. Line transients produced by pulse dialing telephones do not charge capacitor C3 sufficiently to activate the tone ringer output. Capacitors C1 and C4 and resistor R1 determine the 10 V, 24 Hz signature test impedance. C4 also provides filtering for the output stage power supply to prevent droop in the square wave output signal. Six diodes in series with the rectifying bridge provide the necessary non-linearity for the 2.5 V, 24 Hz signature tests. An internal shunt voltage regulator between the RI and RG terminals provides DC voltage to power the output stage, oscillator, and frequency dividers. The DC voltage at RI is limited to approximately 22 V in regulation. To protect the IC from telephone line transients, an SCR is triggered when the regulator current exceeds 50 mA. The SCR diverts current from the shunt regulator and reduces the power dissipation within the IC. External Components R1 Line Input Register R1 affects the tone ringer input impedance. It also influences ringing threshold voltage and limits current from line transients. Range: 2.0 to 10 kΩ. C1 Line Input Capacitor C1 AC couples the tone ringer to the telephone line and controls ringer input impedance at low frequencies. Range: 0.4 to 2.0 µF. R2 C2 R3 Oscillator Resistor Oscillator Capacitor Input Current Sense Resistor Range: 150 to 300 kΩ. Range: 400 to 3000 pF. R3 controls the ringing threshold voltage. Increasing R3 decreases the ring-start voltage. Range: 5.0 to 18 kΩ. C3 Ringing Threshold Filter Capacitor C3 filters the AC voltage across R3 at the input of the ringing threshold comparator. It also provides dialer transient rejection. Range: 0.5 to 5.0 µF. C4 Ringer Supply Capacitor C4 filters supply voltage for the tone generating circuits. It also provides an AC current path for the 10 VRMS ringer signature impedance. (Range: 1.0 to 10 µF). Figure 4. Oscillator Period (1/fO) versus Oscillator R2 C2 Product 34017A Analog Integrated Circuit Device Data Freescale Semiconductor 7 TYPICAL APPLICATIONS INTRODUCTION This paragraph is boilerplate - you may add to it but, can not change wording. You may change numeric values Figure 5. Test One 34017A 8 Analog Integrated Circuit Device Data Freescale Semiconductor TYPICAL APPLICATIONS INTRODUCTION Figure 6. Test Two Figure 7. Test Three 34017A Analog Integrated Circuit Device Data Freescale Semiconductor 9 TYPICAL APPLICATIONS INTRODUCTION Figure 8. Test Four Figure 9. Test Five 34017A 10 Analog Integrated Circuit Device Data Freescale Semiconductor TYPICAL APPLICATIONS INTRODUCTION Figure 10. Test Six 34017A Analog Integrated Circuit Device Data Freescale Semiconductor