Alfa Rpar AS3320 VCF IC DIP18 as replacemetn for Curtis CEM3320

1 pcs. Alfa Rpar AS3320 VCF IC DIP18 replacement for Curtis CEM3320

The IC Alfa Rpar AS3320 is a voltage-controlled filter module that was used in analogue synthesizers in the 1980s. The AS3320 is pin-compatible with the Curtis CEM3320

Mechanical Description of AS3320 :

This AS3320 is housed in a DIP 18 package and is designed for  classic through hole mounting on a circuit board. Use of a socket is possible. The IC has 2 x 9 connecting pins with grid of 2.54 mm x 7.62 mm.

Technical description of the AS3320 :

The AS3320 is a high performance voltage controlled four-pole filter with on-chip voltage controllable resonance IC. The four independent sections may be interconnected to provide a wide variety of filter responses, such as low pass, high pass, band pass and all pass. A single input exponentially controls the frequency over greater than a ten octave range with little control voltage feedthrough. Another input controls the resonance in a modified linear manner from zero to low distortion oscillation. For those demanding applications, provision has been made to allow trimming for improved control voltage rejection. Each filter section features a variable gain cell which is fully temperature compensated, exhibits a better signal-to-noise ratio and generates its low distortion predominantly in the second harmonic. The device includes a minus two volt regulator to ensure low power dissipation and consequent low warm-up drift.

Technically, the IC may differ slightly from the original. When replacing a Curtis CEM3320, the entire instrument must be recalibrated.

The CEM3320 was used in Oberheim and Sequential Circuits Synthesizern..