UTC UTCTA31002 Datasheet

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

Output

8

High Freq.

7

Time Constant

High Freq.

6

Time Constant

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

°C
°C

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R108-004,A

1

UTC TA31002 LINEAR INTEGRATED CIRCUIT

BLOCK DIAGRAM

R1

C1

3

1

LOW
OSC

Note:R1,R2,C1 and C2 are partsexternally mounted

C2

POWER SUPPLY (WITH HYSTERESIS)

5 2

HIGH
OSC

R2

674

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=0.47µF,R1=165kΩ

C2=6800pF,R2=191kΩ

PIN7=GND

PIN7=7V

9 10 11 Hz

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)

UTC UNISONIC TECHNOLOGIES CO., LTD.

QW-R108-004,A

2