Contek TA31002 Datasheet
TA31002 LINEAR INTEGRATED CIRCUIT
TELEPHONE TONE RINGER
DESCRIPTION
The Contek 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
LowFreq.
TimeConstant
LowFreq.
TimeConstant
1
2
Contek
3
4
Output
8
HighFreq.
7
TimeConstant
HighFreq.
6
TimeConstant
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
Contek Microelectronics Co.,Ltd.
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
C
C
1
TA31002 LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
R1
C2
R2
674
Contek
C1
3
1
LOW
OSC
POWER SUPPLY (WITH HYSTERESIS)
5 2
Note:R1,R2,C1 and C2 are partsexternally mounted
HIGH
OSC
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=0.47mF,R1=165k W
C2=6800pF,R2=191k W
PIN7=GND
PIN7=7V
91011Hz
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)
Contek Microelectronics Co.,Ltd.
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
2
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