The T1254 from Greenray Industries is a TCXO that operates from 10 to 50 MHz. It requires a supply voltage of 5 V and has a CMOS output. The device has a stability of ±1.0ppm over a temperature range of -20 to +70°C. It is available in a rugged, radiation tolerant package that measures 20.3 x 12.7 mm.