UTC TA31002 LINEAR INTEGRATED CIRCUIT
TELEPHONE TONE RINGER
DESCRIPTION
The UTC TA31002 is a bipolar integrated circuit
designed for telephone bell replacement. It can also be
used as alarms or other alerting devices.
FEATURES
*Current consumption is small. (at no-load)
*Package is compaction. (DIP-8 pin)
*Oscillation frequency is variable.
*Built-in threshold circuits prevent false triggering due
to power noise as well as “chirps” due to rotary dial.
*Few external componens.
DIP-8
PIN CONFIGURATIONS
Vcc
RSL
Low Freq.
Time Constant
Low Freq.
Time Constant
1
2
3
4
Output
8
High Freq.
7
Time Constant
High Freq.
6
Time Constant
GND
5
ABSOLUTE MAXIMUM RATINGS (Ta=25°C )
Power Supply Voltage Vcc 30 V
Power Dissipation Pd 800 mW
Operating Temperature Topr -40 to 85
Storage Temperature Tstg -55 to 150
PARAMETER SYMBOL VALUE UNIT
°C
°C
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-004,A
1
UTC TA31002 LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
R1
C1
3
1
LOW
OSC
Note:R1,R2,C1 and C2 are partsexternally mounted
C2
POWER SUPPLY (WITH HYSTERESIS)
5 2
HIGH
OSC
R2
674
AMP
8
OUTPUT
ELECTRICAL CHARACTERISTICS( Ta=25°C )
(All voltage referenced to GND unless otherwise specified)
Operating Voltage Vopr 29 V
Initiation Supply Voltage Vsi (note 1) 17 19 21 V
Sustaining Supply Voltage Vsus (note 2) 10.5 12 - V
Initiation Current Consumption Isi No-Load 1.4 3.3 4.2 mA
Sustaining Current Consumption Isus 0.7 1.4 2.5 mA
Oscillation Frequency (not3) fH1
Output Voltage “H” Level VOH Vcc=24V,VOH=-10mA
Output Voltage “L” Level VOL Vcc=24V,VOL=10mA
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
fL
fH2 576 640 703 Hz
C1=0.47µF,R1=165kΩ
C2=6800pF,R2=191kΩ
PIN7=GND
PIN7=7V
9 10 11 Hz
461 512 563 Hz
20.0 21.5 22.5 V
0.7 1.0 2.0 V
*NOTE : 1. Initiation supply voltage (Vsi) is a supply voltage required to start oscillation of the tone ringer.
2. Sustaining supply voltage (Vsus) is a supply voltage required to maintain oscillation of the tone ringer.
3. Oscillation frequency is determined by the following equations 1,2,and 3.
(1) fL=1/1.234•R1•C1 (Hz) ; (2)fH1=1/1.515•R2•C2 (Hz); (3)fH2=1.24 fH1(Hz)
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-004,A
2
UTC TA31002 LINEAR INTEGRATED CIRCUIT
APPLICATION NOTE
In the TA31002 the initiation current consumption (Isi) can be changed by using the RSL terminal. The resistor
RSL is connected to GND from PIN2 as shown in fig.1. Further, the initation current consumption(Isi) can be
changed by changing the value of RSL.
Fig.2 show the graph of Vs-Is characteristic at the time when RSL has been changed to three values. The Vs-Is
characteristic in TA31002 at the time when RSL=6.8kΩ coincides with that at the time when PIN2 of the TA31001 has
been used at an open state.
Vs
LS
1
2
TA31002
RSL
CURRENT
CONSUMPTION
(mA)
Is
RSL=3.3kΩ
RSL=6.8kΩ
RSL=13kΩ
5
4
3
2
1
FIG.2
5
GND
FIG.1
Vsus Vsi
10 20 30
Vs
SUPPLY VOLTAGE (V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R108-004,A
3
UTC TA31002 LINEAR INTEGRATED CIRCUIT
APPLICATION CIRCUIT
TIP
2K
Ω
1 µF/250V
RING
104B42
C4
15 µF/35V
+
-
D5Z27
R
R1
SL
1
2
UTC
TA31002
3
4
0.22 µF
8
61
7
R2
6
C2
5
Ω
SP
fL=1/1.234R1*C1
fH1=1/1.515R2*C2
fH2=1.24fH1
when:
R1=165KΩ R2=191KΩ
C1=0.47µF/16V C2=0.0068µF/16V
fL≅10Hz fH1≅500Hz fH2≅630Hz
C1
15k
Ω
1300:8
Ω
UTC UNISONIC TECHNOLOGIES CO. LTD
4
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