DS1809-100 Dallastat is a nonvolatile digitally controlled potentiometer by Maxim Integrated. Range: 100K Ohms Package: 8-DIP Giving 64 uniform wiper positions over the resistor range.... a very clever little chip ! Download Maxim Integrated DS1809-100 .pdf datasheet: Status: NOS (New Old Stock) Top surface markings: DS1809-100 RoHS Compliant: tbc