Document
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
1 2 3 4
8 7 6 5
Output High Freq. Time Constant High Freq. Time Constant GND
RSL Low Freq. Time Constant Low Freq. Time Constant
ABSOLUTE MAXIMUM RATINGS (Ta=25°C )
PARAMETER
Power Supply Voltage Power Dissipation Operating Temperature Storage Temperature
SYMBOL
Vcc Pd Topr Tstg
VALUE
30 800 -40 to 85 -55 to 150
UNIT
V mW °C °C
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R108-004,A
UTC 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
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) Output Voltage “ H” Level Output Voltage “L” Level
SYMBOL
Vopr Vsi Vsus Isi Isus fL fH1 fH2 VOH VOL
TEST CONDITIONS
(note 1) (note 2) No-Load C1=0.47µF,R1=165kΩ C2=6800pF,R2=191kΩ Vcc=24V,VOH=-10mA PIN7=GND Vcc=24V,VOL=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
*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.
2
QW-R108-004,A
UTC TA31002
APPLICATION NOTE
LINEAR INTEGRATED CIRCUIT
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=6.8kΩ coincides with that at the time when PIN2 of the TA31001 has been used at an open state.
Vs
LS
1 2 TA31002
RSL
5 GND
FIG.1
CURRENT CONSUMPTION (mA) Is 5 4 RSL=3.3kΩ 3 RSL=6.8kΩ 2 RSL=13kΩ 1
Vsus Vsi
30 Vs SUPPLY VOLTAGE (V)
FIG.2
10
20
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R108-004,A
UTC TA31002
APPLICAT.