DESCRIPTION
The PT2257 is an electronic volume controller IC utilizing CMOS technology specially designed for the new generation of AV entertainment products. It has two (2) built-in channels making it ideally suitable for mono and stereo sound applications. The PT2257 provides an I2C control interface, an attenuation range of 0 to -79dB, low noise, and high channel separation. It is housed in an 8 pins, DIP or SOP package. The PT2257’s pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages.

FEATURES
• CMOS technology
• Low power consumption
• Least external components
• Attenuation range: 0 to -79dB at 1dB/step
• Operating voltage: 3 to 9V
• Low Noise, S/N Ratio>100dB (A-weighting)
• Two channel output
• Available in 8 pins, DIP or SOP

APPLICATIONS
• AV surround audio equipment
• Car audio
• Mini compo
• Computer multi-media speaker
• Other audio equipment