Princeton Technology Corp. Echo/Surround Processor Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2398 Description PT2398 is an echo/surround audio processor IC utilizing CMOS Technology and is functionally compatible with ES56028. Equipped with ADC and DAC, it uses digital processing to generate the delay time, which in turn, can be controlled manually or by a micro controller. PT2398 also features an internal VCO circuit in the system clock, thereby, making the frequency easily adjustable. The pin assignments and application circuit are optimized for easy PCB layout and cost saving advantage. Features r CMOS Technology r Least External Components r Auto Muting Function r Auto Reset Function r Low Noise r Low Distortion r Wide Range Time Delay Settings r Can be Controlled Manually or by Micro Controller r External Adjustable VCO r Very Low Operating Current (Typ. 30 mA) Applications r Video Tape Recorder r Video Compact Disk r Television r CD Player r Car Stereo r KARAOKE Mixer r Electronic Musical Instrument r Audio Equipment with Echo/Surround Processor PT2398 v1.3 Page 1 Written March 1998 Princeton Technology Corp. Echo/Surround Processor Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2398 Block Diagram Pin Configuration PT2398 v1.3 Page 2 Written March 1998 Princeton Technology Corp. Echo/Surround Processor Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2398 PT2398 Echo Application Circuit Note: External Resistor having a value of 10 K Ohms to 50 K Ohms may be used. The recommended Resistor Value ( R ) is 10 K Ohms. When the value of the Resistor ( R ) increases, the range of the Delay Time also increases. PT2398 v1.3 Page 7 Written March 1998 Princeton Technology Corp. Echo/Surround Processor Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw PT2398 PT2398 Application Circuit (ERSO-compatible) Note: The performance of PT2398 in this application circuit is similar to ES56033 PT2398 v1.3 Page 8 Written March 1998 Tel : 886-2-29162151 Fax : 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. Echo/Surround Processor PT2398 PT2398 Surround Application Circuit 4.7uF 15K 5600pF Input 100K +5V 0.1uF 100uF 47uF 20K +5V 0.1uF 100uF +5V R 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PT2398 10K 560pF 12K 10uF 560pF 3K Output 15K 15K 10K 5600pF 0.047uF AGND DGND 0.047uF 7.5K 75K 7.5K 75K 0.33uF 0.01uF 0.33uF 0.01uF Note: External Resistor having a value of 10 K Ohms to 50 K Ohms may be used. The recommended Resistor Value ( R ) is 10 K Ohms. When the value of the Resistor ( R ) increases, the range of the Delay Time also increases. Order Information Part Number PT2398 PT2398 v1.3 Package 28 Pins, DIP (600 mil) Page 9 Written March 1998