LINEAR INTEGRATED CIRCUIT TELEPHONE TONE RINGER 31002A bipol

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LINEAR INTEGRATED CIRCUIT TELEPHONE TONE RINGER 31002A bipol

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31002A
LINEAR INTEGRATED CIRCUIT
TELEPHONE TONE RINGER
31002A bipolar integrated circuit designed telephone bell replacement. also used alarms other alerting devices.
FEATURES
*Designed telephone bell replacement. *Low current drain multiple extension lines. *Adjustable 2-frequency tone. *Adjustable warbling rate. *Built-in hysteresis prevents false triggering rotary dial 'CHIRPS'. *Programmable initiation current simple external resistor
SOP-8
DIP-8
CONFIGURATIONS
Freq. Time Constant Freq. Time Costant
Output High Freq. Time Constant High Freq. Time Constant
ABSOLUTE MAXIMUM RATINGS(Ta=25°C
PARAMETER
Supply Voltage Power Dissipation Operating Temperature Storage Temperature
SYMBOL
Topr Tstg
VALUE
UNIT
UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-005,A
31002A
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
HIGH
OUTPUT
POWER SUPPLY (WITH HYSTERESIS)
Note:R2,R3,C2 parts externally mounted
ELECTRICAL CHARACTERISTICS( Ta=25°C, voltage referenced unless otherwise
specified)
PARAMETER
Operating Supply Voltage Initiation Supply Voltage (note Initiation Supply Current (note Sustaining Voltage (note Sustaining Current (note Output Voltage High Output Voltage IIN(Pin IIN(Pin High Frequency High Frequency Frequency
SYMBOL
Vsus Isus
TEST CONDITIONS
Fig.2 6.8K-Pin Fig.2 Load Vcc=Vsus,See Fig.2 Vcc=21V, I8=-15mA Pin6=6V, Pin7=GND Vcc=21V, I8=15mA Pin6=GND, Pin7=6V Pin3=6V, Pin4=GND Pin7=6V, Pin6=GND R3=191K, C3=6800pF R3=191K, C3=6800pF R2=165K, C2=0.47µF
17.0
11.0 19.0
29.0 12.0 21.0 11.0
UNIT
*NOTE (See electrical characteristics sheet) Initiation supply voltage (Vsi) supply voltage required start tone ringer oscillating. Sustaining voltage (Vsus) supply voltage required maintain oscillation.
UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-005,A
31002A
APPLICATION NOTE
LINEAR INTEGRATED CIRCUIT
shows characteristic 31002A tone ringer. Curve plot with RSL<6.8K shows increase current drawn initiation voltage Vsi. characteristic after initiation remains unchanged. Curve illustrates effect increasing above 6.8K initiation current decreases again current alter triggering unchanged.
application circuit illustrates 31002A device typical telephone tone ringer application. ringer signal voltage appears across RING inputs circuit attenuated capacitor resistor also provides isolation from voltage (48V) exchanged line. After full wave rectification bridge diode, wave form filtered capacitor provide supply tone ringer chip. this voltage exceeds initiation voltage (Vsi), oscillation starts. With components shown output frequency chops between 512Hz (FH1) Hz(FH2) Hz(FL) rate. loudspeaker load coupled through 1300 transformer. output coupling capacitor required with transformer coupled loads. When driving pizeo-ceramic transducer type load, coupling transformer (1300:8) required. However, current limiting resistor required. frequency oscillator oscillates rate (FL) controlled external resistor (R2) capacitor (C2). fequency determined using relation FL=1/1.289 high frequency oscillates FH1,FH2 controlled external resistor (R3) capacitor (C3). frequency determined using relation FH1=1/1.504 R3*C3 FH2= 1/1.203 R3*C3. 31002A allows connection external resistor RSL, which used program slope supply current supply voltage characteristics (see Fig.3), hence supply current initiation voltage (Vsi). This initiation voltage remains constant independent RSL. supply current drawn prior triggering varies inversely with RSL, decreasing increasing value resistance. Thus, increasing value RSL, will decrease amount ringing current required trigger device. such, longer sucribser loops possible since less voltage dropped unit length loop wire lower current level. also used compensated smaller coupling capacitors Fig.4) (higher impedance) line which used alter ringer equivalence number tone ringer circuit. graph Fig.3 illustrates variation supply current with supply voltage 31002A. Three curves drawn show variation initiation current with RSL. Curve RSL=6.8K)
UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-005,A
31002A
LINEAR INTEGRATED CIRCUIT
Supply Current Supply Voltage Load)
Circuit Current-Supply Voltage Load)
Icc(mA),Supply Current
Supply Current (mA)
A:RSL=5K B:RSL=6.8K C:RSL=13K
Vcc(V),Supply voltage
Vcc(V),Supply voltage
Fig.2
Fig.
APPLICATION CIRCUIT
0.22 5.6k
RING
µF/35V 165k+-1% 0.47 µF+-5%
31002A
191k+-1% 6.9nF+-5%
1300:8
Fig.4
UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-005,A

LINEAR INTEGRATED CIRCUIT TELEPHONE TONE RINGER 31002A bipol

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