Princeton Technology Corp PT2257, PT2257-S Datasheet
Tel : 886-2-29162151
Princeton Technology Corp.
URL: http://www.princeton.com.tw
Fax: 886-2-29174598
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 suitable 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
• AV Surround Audio Equipment
• Car Audio
• Mini Compo
• Computer Multi-Media Speaker
• Other Audio Equipments
PT2257 v 1.0 Page 1 Updated April 2000
Tel : 886-2-29162151
Princeton Technology Corp.
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Electronic Volume Controller IC PT2257
PIN CONFIGURATION
L
IN
L
OUT
V
SS
APPLICATION CIRCUIT
10uf
IN -L IN -R
OUT-L
10uf
1
2
3
4
PT2257
IN
L
1
2
OUT
L
3
SS
V
4
PT2257
R
SCLSDA
8
7
6
5
R
OUT
DD
IN
R
R
V
SCLSDA
8
7
6
5
IN
OUT
DD
10uf
10uf
2
IC B u s
OUT-R
47uf
MCU
MICRO PROCESSOR
ORDER INFORMATION
Valid Part Number Package
PT2257 8-Pin, DIP (300 mil)
PT2257-S 8-Pin, SO (150 mil)
PT2257 v 1.0 Page 2 Updated April 2000
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