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
8
7
6
5
Output
High Freq.
Time Constant
High Freq.
Time Constant
GND
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C )
PARAMETER
Power Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
SYMBOL
Vcc
Pd
Topr
Tstg
VALUE
30
800
-40 to 85
-55 to 150
UNIT
V
mW
°C
°C
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R108-004,A
UTC TA31002
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
R1
C2
R2
4
7
6
3
C1
LOW
OSC
HIGH
OSC
AMP
8
OUTPUT
1
POWER SUPPLY (WITH HYSTERESIS)
5
2
Note:R1,R2,C1 and C2 are parts externally mounted
ELECTRICAL CHARACTERISTICS
( Ta=25°C )
(All voltage referenced to GND unless otherwise specified)
PARAMETER
Operating Voltage
Initiation Supply Voltage
Sustaining Supply Voltage
Initiation Current Consumption
Sustaining Current Consumption
Oscillation Frequency (not3)
Output Voltage
Output Voltage
*NOTE :
“H” Level
“L” Level
SYMBOL
Vopr
Vsi
Vsus
Isi
Isus
fL
fH1
fH2
V
OH
V
OL
TEST CONDITIONS
(note 1)
(note 2)
No-Load
C1=0.47µF,R1=165kΩ
C2=6800pF,R2=191kΩ
Vcc=24V,VOH=-10mA
PIN7=GND
Vcc=24V,VOL=10mA
PIN7=7V
MIN
17
10.5
1.4
0.7
9
461
576
20.0
0.7
TYP
19
12
3.3
1.4
10
512
640
21.5
1.0
MAX
29
21
-
4.2
2.5
11
563
703
22.5
2.0
UNIT
V
V
V
mA
mA
Hz
Hz
Hz
V
V
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.
2
QW-R108-004,A
UTC TA31002
APPLICATION NOTE
LINEAR INTEGRATED CIRCUIT
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
5
GND
FIG.1
CURRENT
CONSUMPTION
(mA)
Is 5
4
R
SL
=3.3kΩ
3
R
SL
=6.8kΩ
2
R
SL
=13kΩ
1
Vsus
Vsi
30
Vs
SUPPLY VOLTAGE (V)
FIG.2
10
20
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R108-004,A
UTC TA31002
APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
TIP
2KΩ
1
µF/250V
104B42
0.22
µF
1
R
SL
8
2
7
61Ω
R2
C2
RING
D5Z27
3
R1
UTC
TA31002
6
C4
15
µF/35V
+
-
SP
4
5
C1
15kΩ
1300:8Ω
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
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UTC
UNISONIC TECHNOLOGIES CO. LTD
4
QW-R108-004,A
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