Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Electronic Volume Controller IC
PT2257
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 I
2
C 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
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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
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AV surround audio equipment
Car audio
Mini compo
Computer multi-media speaker
Other audio equipment
PT2257 V1.4
-1-
May, 2008
PTC [ PRINCETON TECHNOLOGY CORP ]
