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PT2256 V1.7

- 1 -

August, 2006

Electronic Volume Controller IC

PT2256

DESCRIPTION

PT2256 is an electronic volume controller IC utilizing CMOS Technology specially designed for use on

audio equipment. It has 2 built-in channels making it ideally suitable for mono and stereo sound

applications. PT2256 provides the Loudness Function, a wide frequency response range and a very

low total harmonic distortion, thereby guaranteeing a highly effective and reliable performance. It is

housed in 16-pin DIP or SOP package and is functionally compatible with TC9235P. Pin assignments

and application circuit are optimized for low cost advantages and easy PCB Layout.

FEATURES

• CMOS technology

• Low power consumption

• Least external components

• 2 channels in the same chip

• 0dB to -78dB attenuation can be controlled by up and down pin

• 20dB tap for loudness circuit

• Built-in DC output circuit (8 levels) for volume level metering

• Wide frequency response range

• Low total harmonic distortion

• Available in 16 pins DIP or SOP

APPLICATION

• Audio equipment volume control