EURO QUARTZ OCXO - OC18T5A AT-Cut Crystal - Square Wave - 5.0 Volts 1.25MHz ~ 100.0MHz Frequency Range 1.25MHz to 100.0MHz 20.3 x 20.3 x 10.5mm 5 pin metal, solder-sealed package Supply Voltage 5.0 Volts AT-Cut Crystal Squarewave Output EFC (Voltage control) as standard OUTLINE & DIMENSIONS DESCRIPTION OC18T5A series oven-controlled crystal oscillators are close tolerance OCXOs with good phase noise performance. SPECIFICATION Crystal Cut: Output Waveform: Supply Voltage: Frequency Range: Initial Calibration Tolerance: Frequency Stability over 0° to +60°C: over -20° to +70°C: over -40° to +85°C: vs. Voltage Change: vs. Ageing: vs. Load Change: Warm-up Time: Voltage Control Control Voltage Centre: Freq. Deviation Range: Control Voltage Range: Transfer Function: Input Impedance: EFC Linearity: Power Dissipation: AT-cut Square Wave +5.0 VDC ±0.2V 1.25MHz to 100.0MHz ±0.5ppm max. (at VCON 2.5V) ±0.02ppm ±0.05ppm ±0.1ppm <±20ppb for ±5% change ±5.0ppb max per day ±0.5ppm per first year ±3.0ppm over 10 years <±20ppb for ±5% change 3 minutes max. to within ±0.5ppm of nominal freq. +2.5 Volts (VCON) ±5.0ppm min., ±20ppm max. ref. to 25°C and O.T.R. 2.5V ±2.0Volts Positive: Increasing control voltage increases output frequency. 100k minimum ±10% maximum 200mA max. steady state 500mA max. at turn on Output Load: Output Logic HIGH: Output Logic LOW: Duty Cycle: Rise/Fall Time: Reference Voltage: 15pF HCMOS +4.5V minimum 0.5V maximum 50%±10% 5ns max (20%~80%) Frequency dependant +4.0±0.3VDC or custom Envionmental Storage Temperature: Shock: Vibration: -55° to +125°C 2000g, 0.3ms ½ sine 10 ~2000Hz / 10g PHASE NOISE (at 10MHz) Offset 1Hz 10Hz 100Hz 1kHz 10kHz dBc/Hz -75 -100 -130 -140 -150 TEST CIRCUIT PART NUMBER FORMAT Example: OC18GT5A-10.000-0.05/-20+70 OCXO Package: OC18 RoHS Compliance G: RoHS Compliant Blank: Non-compliant T: Output Squarewave 5: Supply Voltage 5.0Volts A: AT-Cut Crystal Nominal Frequency 10.0MHz Stability in ppm Operating Temperature Range °C Lowest Temperature/Highest Temperature EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk