PT2390 Datasheet | Princeton Technology Corp

DESCRIPTION PT2390 is a digital echo IC utilizing CMOS Technology. Microphone Amplifier, Output Mixer, internal 44K RAM and Vocal Switch are all integrated in a single chip to provide a digital echo IC of the the highest standard. Very low distortion and high S/N Ratio qualities, not to mention the built-in VCO feature which eliminates the need for an external crystal oscillator are just some of the features of PT2390. Pin assignments and application circuit are optimized for easy PCB Layout and low cost effectiveness. FEATURES - CMOS Technology - Least External ponent - 5V Power Supply - 2 Microphone Amplifier and KARAOKE Automatic Vocal Changer - Built-in 44K RAM - Built-in VCO, eliminating the need for a crystal oscillator - Low Total Harmonic Distortion : Microphone Pre-Amplifier <0.09% (typ.) : Echo Processor < 0.5% (typ.) - High S/N Ratio : Microphone Pre-Amplifier > 85 (no - weighting) : Echo Processor > 80 d B (no - weighting) - Available in 28-pin, DIP or SO Package APPLICATIONS - DVD, VCD - KARAOKE - VCR - Mini po - Other Audio Equipments Ref. No. 2390 v1.1 Written July 1999 Princeton Technology Corp. Tel: 886-2-29162151 Fax: 886-2-29174598 URL: http://.princeton..tw Echo IC with Built-in Microphone Amplifier & Output Mixer PT2390 BLOCK DIAGRAM MIC1_IN 1 MIC1_OUT 2 MIX1_IN 3 ECHO_IN 4 LOUT 5 LIN 6 VOCCON 7 VDD 8 REF 9 AGND 10 DGND 11 CLK_IN 12 LPF1_IN 13 LPF1_OUT 14 _+ +- 28...