DESCRIPTION
The Contek 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