Synchro to digital converter 174 Series products are hybrid integrated 12-bit or 14-bit continuous tracking synchro/resolver to digital converter designed according to type II servo principle. This series products adopt MCM process, the core elements adopt special chips developed independently by our institute. The product adopts 32-wire DIL shallow cavity salt spray resistant metal case package with small volume and light weight, and pin-to-pin compatible with SDC/RDC1740/1741/1742 products of AD company, USA.