This 5 MHz crystal is recommended for use with the Propeller and SX chips. Features: Frequency: 5 MHz Accuracy: +/- 30 ppm (parts per million) Package: SIP Technical Specifications: Power Requirment: < 6 VDC Dimensions: .0447L x 0.183w x 0.138H in ( 11.35L x 4.65W x 3.50H mm) Operating Temperature: +14° to +158° F (-10° to +70° C) Downloads: 5 MHz Cystal Data Sheet (.pdf) HC-49 US (.pdf)