IQTCXO-250, -251, -252 ISSUE 7; 14 OCTOBER 2004 Outline in mm Delivery Options 18.5±0.3 ∅3.8 Please contact our sales office for current leadtimes 12.0±0.3 Description IQTCXO-250, -251, -252 are temperature compensated crystal oscillators (TCXOs), providing a high degree of frequency stability over a wide temperature range. 6.55 Waveform Clipped Sine 1V pk - pk min ■ Square HCMOS ■ Clipped Sine 0.7V pk - pk min ∅0.5 4.0±0.2 Package Outline ■ 14 pin DIL compatible enclosure with internal trimmer 1 4.0±0.2 4.0 min ■ Pin Connections 1. N/C 7. GND 8. Output 14. +Vs 5.0 max ■ 1.0±0.2 ■ 7.62±0.3 7 Ageing ■ 14 ±1ppm typical first year 8 15.24±0.3 Frequency Adjustment ■ ±3ppm minimum internal trimmer adjustment Output Waveform - HCMOS Storage Temperature Range ■ –40 to 85°C tf LEADED TCXOs Marking ■ Model number ■ Frequency Stability Code/Operating Temperature Code ■ Frequency ■ Date Code (Year/Week) tr +Vs 90%Vs 1/2Vs 10%Vs Minimum Order Information Required ■ 0V t Frequency + Model Number + Frequency Stability + Operating Temperature T Duty cycle = t x 100(%) T Test Circuit - HCMOS A +Vs Oscillator 7 14 8 V 0.1µF 15pF* Oscilloscope Frequency counter *Inclusive of jigging & equipment capacitance 72 Electrical Specifications - maximum limiting values when measured in test circuit Frequency Range Supply Voltage 3.20 to 40.0MHz 5V±0.25V Supply Current Output Waveform 5mA 3.20 to 40.0MHz 5V±0.25V 20mA 3.20 to 40.0MHz 3V±0.15V 3mA Output Duty Cycle Model Number 1Vpk-pk min — IQTCXO-250 Square HCMOS 40/60% IQTCXO-251 Clipped Sine 0.7Vpk-pk min — IQTCXO-252 Clipped Sine Frequency Stabilities Available Over Operating Temperature Ranges Operating Frequency Range ±1.5ppm Frequency Stabilities Vs Operating Temperature Range ±2.0ppm ±2.5ppm ±5.0ppm 0 to 50°C Code CP Code GP Code HP Code KP -10 to 60°C — Code GR Code HR Code KR -20 to 70°C — — Code HS Code KS -30 to 75°C — — Code HU Code KU -40 to 85°C — — — Code KX Ordering Example 24.0MHz IQTCXO-250 HR Frequency Model number Frequency Stability Vs Operating Temperature Code Test Circuit - Clipped Sine A +Vs Oscillator V 0.1µF 7 8 10pF* 10k LEADED TCXOs 14 Oscilloscope Frequency counter *Inclusive of jigging & equipment capacitance 73