princeton technology corp. tel: 886-2-29162151 fax: 886-2-29174598 url: http://www.princeton.com.tw 4-mode preset equalizer ic PT2381 PT2381 v 1.0 page 1 `feb. 1997 description PT2381 is a pre-set equalizer ic utilizing cmos technology specially designed for audio equipment. it features four sound selections, namely: classical, pops, rock and normal/flat which may be selected by the 2 control pins (sw1 and sw2). PT2381 has 2 built-in channels - each containing an internal operation amplifier and selectable resistors. thus, least external components are used. by connecting only 3 capacitors to each channel, the high performance pre-set equalizing function of this ic is achieved. pin assignments and application circuit are optimized for easy pcb layout and cost saving for audio applications. PT2381 is housed in a 16-pin dip or so package and is suitable for stereo applications. features ! cmos technology ! least external components ! enhanced effects of pt2380 ! available in 16 pins, dip or so package ! 4 sound effect selections available: classical, pops, rock, and normal/flat ! wide operating voltage range: vcc = 2 ~ 15 v ! two channels in the one chip ! can be controlled by micro-processor output pin which is compatible with ta2078, m62412 interface definition applications ! mini compo ! car stereo ! radio cassette recorders ! multi-media speaker ! mpeg card ! mini walk-man ! other audio equipments
princeton technology corp. tel: 886-2-29162151 fax: 886-2-29174598 url: http://www.princeton.com.tw 4-mode preset equalizer ic PT2381 PT2381 v 1.0 page 2 `feb. 1997 pin configuration application circuits note: the capacitor?s polarity of pins: in1, in2, out1, out2 are dependent on the applied dc level of pins in1, in2, out1, out2.
princeton technology corp. tel: 886-2-29162151 fax: 886-2-29174598 url: http://www.princeton.com.tw 4-mode preset equalizer ic PT2381 PT2381 v 1.0 page 3 `feb. 1997
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