This SMD crystal resonator is a passive component designed for a wide range of applications such as timing, auto-alignment, frequency control, and clock-generation. The 7I11059AF12UCG is a surface mount device (SMD) having dimensions of 5.0 x 3.2 mm and four (4) lead pins. It has a working frequency of 12MHz and is RoHS compliant, meaning it is compliant with the Restriction of Hazardous Substances (RoHS) Directive 2002/95/EC which restricts the use of certain hazardous materials in electrical and electronic products. This component is manufactured by SJK Corporation.