UTC TA31002A LINEAR INTEGRATED CIRCUIT
TELEPHONE TONE RINGER
DESCRIPTION
The UTC TA31002A is a bipolar integrated circuit
designed for telephone bell replacement. It can also be
used as alarms or other alerting devices.
FEATURES
*Designed for telephone bell replacement.
*Low current drain for multiple extension of lines.
*Adjustable 2-frequency tone.
*Adjustable warbling rate.
*Built-in hysteresis prevents false triggering and
rotary dial 'CHIRPS'.
*Programmable for initiation current by simple
external resistor
PIN CONFIGURATIONS
DIP-8
Vcc
RSL
Low Freq.
Time Constant
Low Freq.
Time Costant
1
2
3
4
Output
8
High Freq.
7
Time Constant
High Freq.
6
Time Constant
GND
5
ABSOLUTE MAXIMUM RATINGS(Ta=25°C )
Supply Voltage Vcc 30 V
Power Dissipation Pd 400 mW
Operating Temperature Topr -45 to 85
Storage Temperature Tstg -65 to 150
PARAMETER SYMBOL VALUE UNIT
°C
°C
UTC UNISONIC TECHNOLOGIES CO., LTD.
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UTC TA31002A LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
R2
LOW
3
C2
OSC
1
Note:R2,R3,C2 and C3 are parts externally mounted
C3
POWER SUPPLY (WITH HYSTERESIS)
5 2
R3
HIGH
OSC
674
AMP
8
OUTPUT
ELECTRICAL CHARACTERISTICS( Ta=25°C, all voltage referenced to GND unless otherwise specified)
Operating Supply Voltage Vcc 29.0 V
Initiation Supply Voltage (note 1) Vsi See Fig.2 17 19 21 V
Initiation Supply Current (note 1) Isi 6.8K-Pin 2 to GND 1.4 2.8 4.2 mA
Sustaining Voltage (note 2) Vsus See Fig.2 9.7 11.0 12.0 V
Sustaining Current (note 2) Isus No Load Vcc=Vsus,See Fig.2 0.7 1.4 2.5 mA
Output Voltage High VOH Vcc=21V, I8=-15mA
Output Voltage Low VOL Vcc=21V, I8=15mA
IIN(Pin 3)
IIN(Pin 7)
High Frequency 1 FH1 R3=191K, C3=6800pF 461 512 563 Hz
High Frequency 2 FH2 R3=191K, C3=6800pF 576 640 704 Hz
Low Frequency FL
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Pin6=6V, Pin7=GND
Pin6=GND, Pin7=6V
Pin3=6V, Pin4=GND
Pin7=6V, Pin6=GND
R2=165K, C2=0.47µF
17.0 19.0 21.0 V
1.6 V
500
500nAnA
9.0 10 11.0 Hz
*NOTE (See electrical characteristics sheet)
1. Initiation supply voltage (Vsi) is the supply voltage required to start the tone ringer oscillating.
2. Sustaining voltage (Vsus) is the supply voltage required to maintain oscillation.
UTC UNISONIC TECHNOLOGIES CO., LTD.
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