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-pin, DIP or SOP package.
The PT2257’s pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages.
BLOCK DIAGRAM
PT2257 Electronic Volume Controller IC
FEATURES
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CMOS technology • Low power consumption • Least external components • Attenuation range: 0 to...