Datasheet TA31002 Datasheet (Contek)

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:[e-mail]

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:[e-mail]

2

TA31002 LINEAR INTEGRATED CIRCUIT

APPLICATION NOTE

In theContek TA31002
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 W coincides with that at the time when PIN2 of the TA31001 has
been used at an open state.

the initiation current consumption( Isi) can be changed by using the RSL terminal.The resistor

Vs

LS

1

2

RSL

Contek

TA31002

5

GND

FIG.1

CURRENT

CONSUMPTION

(mA)

5

Is

RSL=3.3kW

SL=6.8kW

R

SL=13kW

R

4

3

2

1

Vsus Vsi

10 20 30

Vs

SUPPLY VOLTAGE (V)

CONTEK

FIG.2

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3

TA31002 LINEAR INTEGRATED CIRCUIT

APPLICATION CIRCUIT

TIP

2KW

1 mF/250V

RING

104B42

C4

15mF/35V

+

-

D5Z27

R

R1

0.22mF

1

SL

2

Contek

TA31002

3

4

8

7

R2

6

C2

5

61W

SP

fL=1/1.234R1*C1
fH1=1/1.515R2*C2
fH2=1.24fH1

when:
R1=165KW R2=191K W
C1=0.47mF/16V C2=0.0068 mF/16V
fL@10Hz fH1 @500Hz fH2 @630Hz

Contek Microelectronics Co.,Ltd.

C1

15kW

1300:8W

4

CONTEK

http://www.contek-ic.com E-mail:[e-mail]