UNISONIC TECHNOLOGIES CO., LTD
TA31002
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.
LINEAR INTEGRATED CIRCUIT
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 components.
DIP-8
*Pb-free plating product number: TA31002L
ORDERING INFORMATION
Ordering Number
Normal
Lead Free Plating
TA31002-D08-T
TA31002L-D08-T
Package
DIP-8
Packing
Tube
TA31002L-D08-T
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) T: Tube
(2) D08: DIP-8
(3) Lead Free Plating Blank: Pb/Sn
,
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QW-R108-004.B
TA31002
PIN CONFIGURATIONS
LINEAR INTEGRATED CIRCUIT
Vcc
1
8
Output
High Freq.
Time Constant
High Freq.
Time Constant
RSL
Low Freq.
Time Constant
Low Freq.
Time Costant
2
7
3
6
4
5
GND
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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
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QW-R108-004.B
TA31002
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
LINEAR INTEGRATED CIRCUIT
SYMBOL
RATINGS
UNIT
Power Supply Voltage
V
CC
30
V
Power Dissipation
P
D
800
mW
Operating Temperature
T
OPR
-40 ~ +85
°C
Storage Temperature
T
STG
-55 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
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)
SYMBOL
V
OPR
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, V
OH
=-10mA
PIN7=GND
Vcc=24V, V
OL
=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
Output Voltage “H” Level
Output Voltage “L” Level
*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)
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TA31002
APPLICATION NOTE
LINEAR INTEGRATED CIRCUIT
In the UTC
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 UTC
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
UTC TA31002
RSL
5
GND
FIG.1
Current Consumption
(mA)
Is 5
4
3
2
1
Vsus
Vsi
R
SL
=3.3kΩ
R
SL
=6.8kΩ
R
SL
=13kΩ
10
30
Vs
Supply Voltage (V)
20
FIG.2
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QW-R108-004.B
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