The HC49USM series crystal has output frequency 10 MHz and it is available in SMD package of dimension 13.3 x 11.4 x 4.5mm. It is use in fibre channel server & storage, sonet / SDH802.11 / Wi-Fi T1/E1, T3/E3 as system Clock. It's operating temperature is -40°C to +85°CLow Cost SMD PackageLow ESRCompatible with Lead-free Processing