Description

The ELM412 is an 8 pin oscillator circuit for driving piezo-electric elements. With the exception of one external resistor, all of the circuitry required to drive a typical piezo ‘bender’ is contained within this chip.

Features

• Low power CMOS design

• Wide supply range - 3.0 to 5.5 volt operation

• No external timing elements required

• Generates eight common piezo frequencies

• Bridged output for greater audio power

• Modified waveform for reduced harmonics

Applications

• Computer controlled tone generation

• Alarm warning signals

• Keyboard click generation

• Logic probe circuits