PTC PT2258 free download

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Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 6-Channel Electronic Volume Controller IC PT2258 DESCRIPTION PT2258 is a 6-Channel Electronic Volume Controller IC utilizing CMOS Technology specially designed for the new generation of AV Multi-Channel Audio System. PT2258 provides an I2C Control Interface, an attenuation range of 0 to -79dB at 1dB/step, low noise, and high channel separation. Housed in 20 pins, DIP or SOP, PT2258'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: 5 to 9 V · Low Noise, S/N Ratio>100dB (A-weighting) · High Channel Separation · I2C Bus Control Interface · Selectable Address · 6-Channel Outputs · Available in 20 pins, DIP or SOP APPLICATIONS · AV Surround Audio Equipment · Car Audio · Mini Compo · Computer Multi-Media Speaker · Other Audio Equipments PT2258 V1.2 -1- July, 2005 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw 6-Channel Electronic Volume Controller IC PT2258 BLOCK DIAGRAM IN1 1d B/ s t e p + OUT 1 10 dB /S t ep - Ref 1d B/s te p 10 dB /S t ep + - OUT 2 IN2 IN3 1d B/ s t e p + 10 dB /S t ep - OUT 3 Ref 1d B/s te p 10 dB /S t ep + - OUT 4 IN4 IN5 1d B/s te p + 10 dB /S t ep -