ALFA RPAR AS3394-DIL Synth Voice (DIL-24)
Included inside the compact 24 pin package is fully temperature compensated, wide range, voltage controlled oscillator providing sub-oscillator, triangle, saw-tooth, and pulse waveforms; a voltage controlled mixer for adjusting the balance between the internally generated VCO waveforms and any external signal; a dedicated four-pole low-pass voltage controlled filter with voltage controlled resonance; a modulation VCA for modulating the filter frequency by the triangle waveform output of the VCO; and a final VCA for allowing the output to be enveloped. Envelope control for both the VCF and final VCA may be provided by either a hardware envelope generator such as the AS3310 or through software.
All eight control inputs are provided with internal very high input impedance, low bias current buffers. Thus interface to a microprocessor system may be accomplished simply with a single DAC, 4051-type CMOS multiplexer, and 8 hold capacitors.
Features
- Sample & hold buffers on-chip for easy interface to a microprocessor
- Fully temperature compensated VCO
- Independently selectable VCO waveforms
- Sub-oscillator output
- Separate saw-tooth output
- Separate VCO and filter sections allowing design flexibility
- Constant loudness vs resonance VCF
- Filter FM routing for more timbres
- Low noise, low feedthrough VCA
- +5V, −6.5V power supply
Product Replacements
This device is electrically compatible with original chips used in the following products. Note however that this device has 4 more pins than the original and thus cannot be used directly as a replacement. *
| Manufacturer | Product | Quantity |
|---|---|---|
| Akai | AX60 | 6 |
| Akai | AX73 | 6 |
| Akai | VX90 | 6 |
| Doepfer | A-111-5 Mini Synthesizer Voice | 1 |
| Doepfer | Dark Energy, Monophonic Synthesizer (orig model only) | 1 |
| Sequential Circuits / Dave Smith Instruments | Six-Trax | 6 |
| Sequential Circuits / Dave Smith Instruments | Multi-Trak | 6 |
| Sequential Circuits / Dave Smith Instruments | MAX | 6 |
| Sequential Circuits / Dave Smith Instruments | Split8 | 8 |
| Simmons Drums | SDS9/SDS1000 | 3 |
| Simmons Drums | SDS200 | 2 |
| Simmons Drums | SDS400/SDS800 | 4 |
Package: DIL-24
Compatible* Replacement Parts
| SKU | Product | Pkg | Mfg |
|---|---|---|---|
| AS3394-SMT | Synth voice | SOIC-24 | ALFA RPAR |
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(*) Products listed as "Compatible" have the same circuit functionality as this product. However they may have some variation in electrical characteristics - check datasheets to verify compatibility in your circuit design. Some may also have different physical packaging requiring adapters or PCB design changes.