CNTK 31002A Datasheet
31002A LINEAR INTEGRATED CIRCUIT
TELEPHONE TONE RINGER
DESCRIPTION
The Contek 31002A 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
Contek
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
Contek Microelectronics Co.,Ltd.
C
C
1
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
31002A LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
R2
C3
Contek
LOW
3
C2
OSC
1
Note:R2,R3,C2andC3 areparts externallymounted
POWERSUPPLY(WITHHYSTERESIS)
5 2
R3
HIGH
OSC
674
AMP
8
OUTPUT
ELECTRICAL CHARACTERISTICS( Ta=25 C, all voltage referenced to GND unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
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)
I
IN(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
Pin6=6V, Pin7=GND
Pin6=GND, Pin7=6V
Pin3=6V, Pin4=GND
Pin7=6V, Pin6=GND
R2=165K, C2=0.47mF
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.
Contek Microelectronics Co.,Ltd.
CONTEK
http://www.contek-ic.com E-mail:sales@contek-ic.com
2
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