UTC TA31002
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R108-004,A
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
1
2
3
4
8
7
6
5
Vcc
RSL
Low Freq.
Time Constant
Low Freq.
Time Constant
Output
High Freq.
Time Constant
High Freq.
Time Constant
GND
ABSOLUTE MAXIMUM RATINGS
(Ta=25
C )
PARAMETER
SYMBOL
VALUE
UNIT
Power Supply Voltage
Vcc
30
V
Power Dissipation
Pd
800
mW
Operating Temperature
Topr
-40 to 85
C
Storage Temperature
Tstg
-55 to 150
C
UTC TA31002
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R108-004,A
BLOCK DIAGRAM
LOW
OSC
HIGH
OSC
AMP
POWER SUPPLY (WITH HYSTERESIS)
8
6
7
4
3
1
5
2
OUTPUT
R2
R1
C2
C1
Note:R1,R2,C1 and C2 are partsexternally mounted
ELECTRICAL CHARACTERISTICS
( Ta=25
C )
(All voltage referenced to GND unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
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
fL
C1=0.47
F,R1=165k
9
10
11
Hz
Oscillation Frequency (not3)
fH1
C2=6800pF,R2=191k
461
512
563
Hz
fH2
576
640
703
Hz
Output Voltage " H" Level
V
OH
Vcc=24V,VOH=-10mA
PIN7=GND
20.0
21.5
22.5
V
Output Voltage "L" Level
V
OL
Vcc=24V,VOL=10mA
PIN7=7V
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 TA31002
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R108-004,A
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=6.8k
coincides with that at the time when PIN2 of the TA31001 has
been used at an open state.
FIG.1
FIG.2
TA31002
1
5
2
GND
Vs
LS
RSL
10
20
30
1
2
3
4
5
Vsus
Vsi
SUPPLY VOLTAGE (V)
R
SL
=3.3k
R
SL
=6.8k
R
SL
=13k
CURRENT
CONSUMPTION
(mA)
Is
Vs
UTC TA31002
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO. LTD
4
APPLICATION CIRCUIT
fL=1/1.234R1*C1
fH1=1/1.515R2*C2
fH2=1.24fH1
when:
R1=165K
R2=191K
C1=0.47
F/16V C2=0.0068
F/16V
fL
10Hz fH1
500Hz fH2
630Hz
SP
TIP
RING
1
F/250V
2
1
3
4
8
7
6
5
2K
C4
15
F/35V
R1
C1
R
SL
R2
C2
15k
0.22
F
UTC
TA31002
1300:8
104B42
61
+
-
D5Z27
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