Electronic Volume Controller IC PT2257 DESCRIPTION
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 suit-able for mono and stereo sound applications.  PT2257 provides an I2C Control Interface, an attenuation range of 0 to -79 dB, low noise, high channel separation. Housed in 8-pin, DIP or SO Package,
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 -79 dB at 1dB/step
•Operating Voltage: 5 to 9 V
•Low Noise, S/N Ratio>100dB (A-weighting)
•Two Channel Output
•Available in 8-pin, DIP or SO Package
APPLICATIONS
electronic去掉ic是什么•AV Surround Audio Equipment
•Car Audio
•Mini Compo
•Computer Multi-Media Speaker
•Other Audio Equipments
Electronic Volume Controller IC PT2257
PIN CONFIGURATION
V D D V S S L IN R IN R O U T L O U T S C L
S D A
P T 2257
APPLICATION CIRCUIT
ORDER INFORMATION
Valid Part Number
Package
PT22578-Pin, DIP (300 mil)PT2257-S
8-Pin, SO (150 mil)
O U T -L
I N -L I N -R O U T -R
MICRO PROCESSOR

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