PSB652X-Y

PSB6520 SIEMENS | Alldatasheet

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Technical content

Features

@ Integrated bridge rectifier allows direct input via call signal (AC voltage) @ Low current consumption (several tone ringers can be connected in parallel) @ High noise immunity due to built-in voltage-current hysteresis @ Direct replacement of the mechanical bell requiring only few additional external compo- nents and an acoustic converter @ Two tone frequencies, switched internally @ Tone and switching frequencies adjustable by means of a resistor and a capacitor @ Overvoitage protection 829

Pin Configuration Pin Defintions and Functions (op view) Pin No. Function _ — GND [2 pgp 7 Moc 2 |GND | Ground c 3652K-Yet we 3 1Cs | Connection for capacitor C, e, Ck SH ven 4 Connection for resistor A,

5 Output voltage

6 Not connected

7 Voc Connection for smoothing

capacitor C, = 10 uF (internal supply voltage) (PSB 6523-T: connection also for Z-diode ZD)

8 AC voltage input

Block Diagram of a Standard Electronic Telephone Set Tipao ° Pushbutton Set , 7] s Tone Ringer Module with PSB 8510 Speech Circuit with PSB 652x-Y {DTMF dialing and PSB 4500/01 pulse dialing) i ==@ M Ring be | Siemens Aktiengeselischaft 830

The tone ringer devices PSB 652X-Y are designed for use as an electronic bell in a tele- phone set. Figure 2 shows the block diagram and figure 3 the circuit example of the PSB 652X-Y in a telephone set. Figure 2 Block Diagram of the PSB 652X-Y Tone Ringers G I nt — P Hed 21 St S2 20 36V m G24 Threshold cof Circuit with 4 | 1) | [Hysteresis Bay aM a A Wes ky 5 Oh. oe aS tye Output ® i Une Kay ta Frequency j 4 Control } 72.6) 2 [|e bo 4 i fs = 2 1) integrated Z-diode, no external Z-diode necessary: PSB 6520-2 PSB 6521-2 2) external Z-diode necessary, no integrated Z-diode: PSB 6523-T Siemens Aktiengesellschaft 831

The ICs contain an oscillator which generates a square wave voltage. The frequency of this voltage is periodically switched by a second oscillator back and forth between two values f,; and f.; having a certain ratio. The switching frequency f, is adjusted by the capacitor C,. The basic frequency f,, is adjusted by the resistor R;. The diagrams in figure 12 and 13 show the relationship. The formulas to calculate the frequencies of the different devices are: Pees , 750 a) Switching Frequency (commonly valid) —f, [Hz] = Cnr, ni b) Tone Frequencies (individual) 2.72 x 10* PSB 6520-2: fy [Hz] = ————_ ir [HZ] R [KO ft, =— xf, ™ 138 1.7888 x 10* -2: fy [Hz] = ——— PSB 6521-2: ir [HZ] R [kQ] f, =—— xf, " 12507 Siemens Aktiengesellschaft 832

PSB 6523-T: Colour code: Veco]? 8 Mec no[]2 7c cs[]3 6f]nc arts 5{] Your L brown (1) red (2) orange (3) yellow (4) yellow bar 1.7888 x 10¢ Group 1 fy [Hz] = ——— (yellow/brown bar) R [kQ} 1.9608 x 104 Group 2 fy [Hz] = —— (yellow/red bar) R [kQ} 1.6336 x 1 Group 3 fry [Hz] = 6896 x 108 (yellow/orange bar) R [kQ] Group 4 fy [Hz] = 21568 x 108 (yellow/yellow bar) R [kQ} fr = yg Xho Good frequency stability is achieved by means of internal temperature compensation. ‘An output stage increases the generated tone voltage and transfers it to a piezo-resonator via an internal resistor. An electro-dynamic converter (low impedance loudspeaker) can be similarly driven, but must be matched to the internal resistance of the output stage (fig. 6, 7, 8 and 12) with a transformer. 833

An integrated bridge rectifier enables direct input via the call AC voitage signal, between tip (a) and ring (b) wires or via DC voltage (independent of polarity). A DC voltage supply without use of the integrated bridge is possible via the connections 2 and 7. In conjunction with an integrated or external Z-diode, the bridge rectifier serves simultaneously as an overvoltage protection. The application circuit shown in figure 3 can handle overvoltages occurring due to lightning strikes between terminals a and b, or the occurence of an AC voltage of 110 V/50 Hz over a period of 30 s. So a possible damaging of the IC is prevented. The threshold circuit with high threshold voltage and hysteresis is designed to prevent activation of the IC due to noise pulses (figure 4). Figure 3 Application Circuit of PSB 652X-Y for Telephone Sets (example) +pF a Tae Lee, nc fer PSB | ( 652X-Y | PE ben. J Mm, == 0 Doonverter = = 2.2yF * Y | cenry , , | Waco (GND [CR 0 Ring bo R=8009 {2 ry 16K AY . 1 36V (] ' ? 1

11 Integrated Z-Diode : PSB 6520-2/ PSB 6521-2

2)External Z-Diode Necessary: PSB 6523-T The characteristic curves from figure 4 to figure 6 show the relationship between current consumption, supply voltage, output current, output power, output resistance and calling voltage. Nominal Values: C,=100nF, f,=7,5Hz R,= 16k, fy, ~ 1700 Hz (PSB 6520-2) fy = 1100 Hz (PSB 6521-2 PSB 6523-T group 1) ‘Siemens Aktiengeselischatt 834

Psp | PSB 6520-2/| 6523-T 6521-2 Values | Values Parameter [ min. [max [max | max | Tost Conditions AC input voltage Vac 1.8 pe (pin 1 to pin 8 Deak to peak) DC input voltage Yoore |_| [26 [40 [Vv [continuous ton 70 Bn 2 [Tae [as [rere to Input current Tre | [80 | [maT continuous (pins 1, 8) Toems A ‘ON/OFF operation 100 48/30 s Ringing voltage Van 150 v test circuit fig. 3 f=50Hz 1.88. | s operation/ 3.6 | pause Transient current spikes Ts 30 ps pulse into the output (pin 5) 3 ms pause Voltage applied at Cs Vez v (pin 3 to pin 2) Voltage applied at Ry Van 7 v (pin 4 to pin 2) Operating temperature [7% |=20 [70 [| fee | Storage temperature a Junction temperature a Thermal resistance junetion-air 140 kw | Siemens Aktiengeselischaft 835

T,=—20°C to 70°C se | PSB 6520-2/| 6523-T 6521-2' Values | Values Parameter Symbol_| min [typ [max [max | max._| ‘Test Conditions AC operating me |Trcime | | [18 | |__| ma [continuous current Thc arms ON/OFF (pins 1,8) operation Ss/108 DC operating input | Voc 7.2 v voltage (pin 7 to pin 2) = |x DC operating Joc 22, i) Voc 7.2 = input current Voc 7.2 max. el od ll Pace DC current Toc? device activated consumption V,2=88V to without load max. Voo72 Ty = 25°C?) DC resistance when Ta = 25°C not activated Output square-wave | Vos.2 Vro v Ta= 25°C voltage swing -3 (pin 5 to pin 2) Short-circuit output | Is.2 oF Is,7 £35 V;2=20V current Ta= 25°C (peak-to-peak)? Tone frequency TC 8x10 temperature coefficient 1) An internal resistor of 500 Q is connected before the output 2) Pin 4 open Pin 3 grounded or Cz 10 nF Siemens Aktiengeselischaft 836

PSB 6520-2 | PSB 6521-2 | PSB 6523-T Limit Limit Limit Values Values. Values Parameter Symbot [min [max [ min. [max | min [max [min ] max | Unit Ringing voltage for | Va rms application circuit figure 3 v = 50 Hz test circuit continuous operation 5 s operation/ 110 v 10 s pause Tone frequency fir 1615 | 1785 1174 | 4062 | 1174 | Hz Ry = 16 kQ [1164 | 1267 1073 | 1280 | 1416 | Tmeteaueneyane| jor pe | [tf | we Tone frequency ratio. | fyr:fer 1.35 1.275 1.275 Ry = 16 kKQ Switching frequency 975 Hz Cy = 100 nF ‘Switching frequency He range Input impedance Zins kQ 5.20 kHz Vi ormeS13V * Four colour coded frequency groups Siemens Aktiengesellschaft 837

Output power Pour versus RMS output resistance Rout rms call voltage V,, for power matching versus calll voltage V,., mW kQ 80 i 2 | « fT | Laer | a rie | /

40 Fi 1

_ } A Jf ° | | 0 © 20 30 40 50 60 70 80V o m0 0% 3 4 Sov — = My Figure 9 Test Circuit to Determine Delay Times Pn | tye i Ry | taf | ASUS t

1 Le 1g

g Yel 1 Ste B PSB 652x-r] 1) Ror | Y, Ibe tron Lb \\ 1 @: as yo 1 ‘al al zo 161 \\ Sov t ' | a +) external Z-diode necessary: PSB 6523-T Siemens Aktiengesellschaft 840

Figure 9.1 Delay Times Dependence of delay times tow, torr ON Va Vour ! \\, ! \\ Vy = 30V tow - \\ tore i t Mos ia | ccc ints ! Nyy >30V i ) a a ty het Nop Your | rr Vy <30V H \\ as | 1 1 L ee oo — | 7 6 het ———— Effective value of input signal (calll voltage Vj.) ——---—-—- Effective value of output signal (output voltage Vou7) t-t Time duration of applied call voltage Vs. Siemens Aktiengesellschaft 841