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| Princeton Technology Corp. Electronic Volume Controller IC DESCRIPTION Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2257 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 Princeton Technology Corp. Electronic Volume Controller IC PIN CONFIGURATION Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2257 LIN LO U T VSS SDA 1 2 3 4 8 7 6 5 R IN ROUT VDD SCL PT2257 APPLICATION CIRCUIT 10uf IN -L O U T -L 10uf 1 LIN 2 3 10uf RIN 8 DD 6 LO U T R O U T 7 SCL 5 10uf IN -R O U T -R 47uf VS S 4 SDA PT2257 IC B u s 2 MCU MICRO PROCESSOR ORDER INFORMATION Valid Part Number PT2257 PT2257-S Package 8-Pin, DIP (300 mil) 8-Pin, SO (150 mil) PT2257 v 1.0 Page 2 Updated April 2000 |
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