CO4905-4.000-EXT-TR is a Raltron surface mount temperature compensated crystal oscillator (TCXO). It is a high performance, low power 4 MHz oscillator. It is designed for applications that require tight stability and low phase noise. This TCXO has an operating temperature range of -40°C to +85°C and an extended temperature range of -55°C to +125°C. The CobaltLabs patented proprietary Xponential™ technology provides low phase noise, fast start-up, low power consumption and small footprint. It features a miniaturized 4-pad plastic SMD package, 3.2mm x 2.5mm x 0.77mm (LxWxH), and includes an external frequency trim option. This part number is suitable for various systems such as GPS, cellular, WiFi, Bluetooth, industrial, medical and satellite.