5x7mm Surface Mount High Precision TCXO In Stock at Digi-Key 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630-851-4722 Fax: 630-851-5040 www.conwin.com US Headquarters 630-851-4722: European Headquarters: +353-61-472221 Description Features D7 The Connor-Winfield ’s D75AS 5A 20 S 0 8 .0M 4 7 is a 5x7mm Surface Mount Hz Temperature Compensated Crystal Controlled Oscillators (TCXO) with a clipped sinewave output. Through the use of Analog Temperature Compensation, the D75AS is capable of holding sub 0.25ppm stabilities over the 0 to 70°C temperature range. Model D75AS TCXO 3.3V Operation Clipped Sinwave Output Frequency Stability: ±0.25ppm Temperature Range: 0 to 70°C Low Jitter <1pS RMS Tri-State Enable/Disable Function 5x7mm Surface Mount Package Tape and Reel Packaging RoHS Compliant / Lead Free Specifications Absolute Maximum Ratings Parameter Minimum Nominal Maximum Units -55 - 85 °C Storage Temperature Supply Voltage (Vcc) -0.5 - 6.0 Vdc -0.5 - Vcc+0.5 Vdc Minimum Nominal Maximum Units Input Voltage Note Operating Specifications Parameter Center Frequency (Fo) 20.0 Note MHz Frequency Calibration @ 25°C -1.00 - 1.00 ppm 1 Frequency Stability [±(Fmax – Fmin)/2.Fo] -0.25 - 0.25 ppm 2 Supply Voltage Variation (Vcc ±5%) -0.025 - 0.025 ppm Load Coefficient (±5%) -0.025 - 0.025 ppm - - 0.40 ppm Absolute, 3 Frequency shift after reflow soldering -1.00 - 1.00 ppm 4 Aging 1st year -1.00 - 1.00 ppm Total Frequency Tolerance -4.60 - 4.60 ppm 0 - 70 °C Vdc Static Temperature Hysteresis Temperature Range Supply Voltage (Vcc) 3.135 3.3 3.465 Supply Current (Icc) - - 10 mA Period Jitter - 3 5 ps rms Phase Jitter (BW=12kHz to 20MHz) - 0.5 1 SSB Phase Noise at 10Hz offset - -80 5 ps rms dBc/Hz SSB Phase Noise at 100Hz offset - -110 dBc/Hz SSB Phase Noise at 1KHz offset - -135 dBc/Hz SSB Phase Noise at >10KHz offset - -150 dBc/Hz Input Characteristics For Enable / Disable Function (Pin 8) Parameter Minimum Nominal Maximum Units Note Enable Voltage (High) or open circuit (Vih) 70%Vcc - - Vdc 6 Disable Voltage (Low) Output Disabled (Vil) - - 30%Vcc Vdc Minimum Nominal Maximum Units Note 1.00 - - V pk-pk 7 Output Load Resistance - 10K - Ohms Output Load Capacitance - 10 - pF Clipped Sinewave Output Characteristics Parameter Output Voltage Note: 1) 2) 3) 4) 5) Bulletin Tx243 Page 1 of 2 Revision Date 01 01 May 2009 6) 7) 8) 8 Initial calibration @ 25°C. Specifications at time of shipment after 48 hours of operation Frequency stability vs. change in temperature. Frequency change after reciprocal temperature ramped over the operating range. Frequency measured before and after at 25°C. Within two hours after reflow. Inclusive of calibration @ 25°C, frequency vs. change in temperature, change in supply voltage (±5%), load change (±5%), reflow soldering process and 20 years aging, referenced to Fo. Leave Pad 8 unconnected if enable / disable function is not required. When tri-stated, the output stage is disabled but the oscillator and compensation circuit are still active (current consumption < 1 mA). Output is AC coupled. For best performance it is recommended that the circuit connected to this output should have an equivalent input capacitance of 10pF. Specifications subject to change without notice. All dimensions in inches. © Copyright 2008 The Connor-Winfield Corporation 2111 Comprehensive Drive Aurora, Illinois 60505 Phone: 630-851-4722 Fax: 630-851-5040 www.conwin.com Package Characteristics Package Ordering Information Ceramic Surface Mount Package. D75AS - 020.0MHZ * Environmental Characteristics Vibration: Shock: Soldering: Vibration per Mil Std 883E Method 2007.3 Test Condition A Mechanical Shock per Mil Std 883E Method 2002.4 Test Condition B. SMD product suitable for Convection Reflow soldering. Peak temperature 260°C. Maximum time above 220°C, 60 seconds. Solderability per Mil Std 883E Method 2003 Solderability TCXO SERIES * For the tape and reel option, add -T to the end of the part number. Example: D75AS-020.0 MHZ -T Pad Connections Design Recommendations Vcc, should have a large copper area for reduced inductance. Connect a 0.01uF bypass capacitor <0.1”(2.54mm) from the pad. 6 8 9 5 10 4 3 1 Pad 1 2 3 4 5 6 7 8 9 10 Buffer input load should be equivalent to 15pF. 50 Ohm trace Vcc <1”by design 0.010”(0.254mm) Recommended clearance inductance for internal copper flood. Ground, should have a large copper area for reduced inductance. Top View CENTER FREQUENCY Buffer Ground Top View Ground Connection Do not connect Do not connect Do not connect Ground Output Do not connect Do not connect Enable / Disable Supply, Vcc Do not connect Output Waveform 50 Ohm Trace Without Output Vias Buffer OSC TOP LAYER GROUND LAYER ....... Do not route any traces in the keep out area. It is recommended the next layer under the keep out area is to be ground plane. BOTTOM LAYER 10ns 200mV Package Layout 0.276 ±0.006 (7.0mm) 0.025(6 Places) (0.635mm) Pin 1 1 0.030 (0.762mm) (4 Places) 2 4 8 7 6 0.100 (2.54mm) E/D 8 Vcc Supply Voltage 0.040 (1.02mm) (6 Places) 5 Dimensional Tolerance: ±.005 (.127mm) ±.02 (.508mm) Tape and Reel Information 0.037 (0.94mm) DNC DNC 0.051 (1.28mm) 0.030 (0.76mm) 0.100 (2.54mm) 9 0.038 (0.965mm) (4 Places) 3 10 0.295 (7.49mm) 0.197 ±0.006 (5.0mm) D75AS 0847 20.0MHz Test Circuit Suggested Pad Layout 0.079 Max. (2.0mm) Keep Out Area* Top View 6 7 9 5 10 4 Output 10Kohm DNC .01 uF Bypass 1 2 10 pF** 3 0.215 (5.46mm) 0.051 (1.28mm) 1 * Do not route any traces in the keep out area. It is recommended the next layer under the keep out area is to be ground plane. DNC DNC DNC DNC = Do Not Connect E/D = Enable / Disable ** NPO Grade component Solder Profile Temperature 260°C 260°C 220°C 180°C 150°C 1 120°C 0 120 S Max. US Headquarters: 630-851-4722 European Headquarters: +353-61-472221 Specifications subject to change without notice. All dimensions in inches. © Copyright 2008 The Connor-Winfield Corporation Time 10 S 60 S Max. 360 Sec. Max. Bulletin Tx243 Page 2 of 2 Revision Date 01 01 May 2009