TCXO Specification Part No. + Packaging: LFTCXO070179Cutt Customer Part: Description Outline (mm) The IQXT-274-6 employs an analogue IC for the oscillator and temperature compensation. The crystal is surface mounted on top of the ceramic IC carrier. The segregation of the crystal from the oscillator further improves the reliability of the product. Model IQXT-274-6 Model Issue number 1 Frequency Parameters Frequency 19.20MHz Frequency Tolerance 1.00ppm 0.50ppm Frequency Stability Operating Temperature Range -30.00 to 85.00C Ageing 2ppm max over 1 year 25C Frequency Tolerance: Offset from nominal frequency measured at 25C 2C. Reflow shift (two consecutive reflows as per profile after 1 hour recovery at 25C):1ppm max Frequency Stability: Referenced to the midpoint between minimum and maximum frequency value over the specified temperature range, note 1 Frequency slope: (temperature range -10C to 60C. Tested to a minimum of 1 frequency reading every 2C, note 1): 0.05ppm/C max Frequency drift: (calculated from frequency slope with temperature varied at a maximum of 1.92C/min (0.032C/s) over -10C to 60C, note 5): 1.6ppb/sec max Frequency slope (temperature range -30C to 85C. Tested to a minimum of 1 frequency reading every 2C, note 1): 0.1ppm/C max Frequency drift: (calculated from frequency slope with temperature varied at a maximum of 0.96C/min (0.016C/s) over -30C to 85C, note 5): 1.6ppb/sec max Small thermal cycle frequency slope (measured at 0.5C intervals over any 5C heating and 5C cooling cycle, at a Pb-Free Reflow minimum rate of 1C/minute within the operating temperature range, note 6): 50ppb/C max Small thermal cycle hysteresis (difference in frequency measurements over any 5C heating and 5C cooling cycle, at a minimum rate of 1C/minute within the operating temperature range): 50ppb pk-pk max Supply Voltage Variation (5% change, at 25C): 0.1ppm max Load Variation (10% change): 0.2ppm max Electrical Parameters 2.85V 5% Supply Voltage Current Draw 2.000mA Supply Current: (at Vs max) Output Details Output Compatibility Clipped Sine Drive Capability 10k//10pF 10% Output: DC coupled (note 4) Output Voltage Level (at Vs min): 0.8V pk-pk min Sales Office Contact Details: UK: +44 (0)1460 270200 France: 0800 901 383 Email: info iqdfrequencyproducts.com Germany: 0800 1808 443 USA: +1.760.318.2824 Web: www.iqdfrequencyproducts.com Printed on 4 Aug 21 22:44 using Part Data Sheet V1.0018 Page 1 of 2TCXO Specification Part No. + Packaging: LFTCXO070179Cutt Customer Part: Noise Parameters Phase Noise (typ at 25C): -62dBc/Hz 1Hz -90dBc/Hz 10Hz -115dBc/Hz 100Hz -135dBc/Hz 1kHz -147dBc/Hz 10kHz -149dBc/Hz 100kHz Phase Noise (max at 25C): -57dBc/Hz 1Hz -86dBc/Hz 10Hz -111dBc/Hz 100Hz -133dBc/Hz 1kHz -144dBc/Hz 10kHz -148dBc/Hz 100kHz Environmental Parameters Shock: Half sine-wave acceleration of 100G peak amplitude for 11ms duration, 3 cycles each plane. Humidity: after 48 hours at 85C2C 85% relative humidity non-condensing. Thermal shock: exposed at -40C for 30 minutes then to 85C for 30 minutes constantly for a period of 5 days. Storage Temperature Range: -40 to 85C Manufacturing Details Note 1: Parts should be shielded from drafts causing unexpected thermal gradients. Temperature changes due to ambient air currents can lead to short term frequency drift. Note 2: Specified for the load stated in the Output Details section, at 25C. Note 3: The unit will operate on any voltage between minimum and maximum values. Note 4: External AC-Coupling capacitor required. 1nF or greater recommended. Note 5: Frequency drift rate is calculated from the equation ppb/s=C/s x ppb/C Note 6: Discard the first 0.5C interval of each heating and cooling cycle. Compliance RoHS Status (2015/863/EU) Compliant REACh Status Compliant MSL Rating (JDEC-STD-033): Not Applicable Packaging Details Pack Style: Cutt In tape, cut from a reel Pack Size: 100 Alternative packing option available Sales Office Contact Details: UK: +44 (0)1460 270200 France: 0800 901 383 Email: info iqdfrequencyproducts.com Germany: 0800 1808 443 USA: +1.760.318.2824 Web: www.iqdfrequencyproducts.com Printed on 4 Aug 21 22:44 using Part Data Sheet V1.0018 Page 2 of 2