UTC 31002A LINEAR INTEGRATED CIRCUIT
UTC UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R108-005,A


TELEPHONE TONE RINGER

DESCRIPTION
The UTC 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




DIP-8
SOP-8

PIN CONFIGURATIONS

1
2
3
4
8
7
6
5
Vcc
RSL
Low Freq.
Time Constant
Low Freq.
Time Costant
Output
High Freq.
Time Constant
High Freq.
Time Constant
GND


ABSOLUTE MAXIMUM RATINGS(Ta=25°C )
PARAMETER SYMBOL VALUE UNIT
Supply Voltage Vcc 30 V
Power Dissipation Pd 400 mW
Operating Temperature Topr -45 to 85 °C
Storage Temperature Tstg -65 to 150 °C