tel : 886-2-29162151 fax : 886-2-29174598 url: http://www.princeton.com.tw echo/surround processor PT2398 PT2398 v1.3 page 1 written march 1998 princeton technology corp. 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
tel : 886-2-29162151 fax : 886-2-29174598 url: http://www.princeton.com.tw echo/surround processor PT2398 PT2398 v1.3 page 2 written march 1998 princeton technology corp. block diagram pin configuration
tel : 886-2-29162151 fax : 886-2-29174598 url: http://www.princeton.com.tw echo/surround processor PT2398 PT2398 v1.3 page 7 written march 1998 princeton technology corp. 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.
tel : 886-2-29162151 fax : 886-2-29174598 url: http://www.princeton.com.tw echo/surround processor PT2398 PT2398 v1.3 page 8 written march 1998 princeton technology corp. PT2398 application circuit (erso-compatible) note: the performance of PT2398 in this application circuit is similar to es56033
tel : 886-2-29162151 fax : 886-2-29174598 url: http://www.princeton.com.tw echo/surround processor PT2398 PT2398 v1.3 page 9 written march 1998 princeton technology corp. PT2398 surround application circuit 28 27 26 25 24 23 22 21 20 19 18 17 16 15 PT2398 0.01uf 75k 0.33uf 0.01uf 7.5k 7.5k 75k 0.33uf 0.047uf 0.047uf 15k 15k 10k 560pf 5600pf 560pf 12k 10k 5600pf 15k 4.7uf input 100k 10uf 3k output 1 2 3 4 5 6 7 8 9 10 11 12 13 14 r 20k +5v +5v +5v 47uf 0.1uf 100uf 0.1uf 100uf agnd dgnd 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 package PT2398 28 pins, dip (600 mil)
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