AY-3-1270 digital thermometer and temperature controller IC in a 40 pin DIP package by General Instruments. a well respected device that has stood the test of time, still sought after as it was widely used in the medical industry, industrial instrumentation and bio sciences. Download General Instruments AY-3-1270 datasheet: Status : RNOS (Rare New Old stock) in original unopened tubes. Ex RS Components. 1892 RS legacy stock number RS309-486 RoHS: no