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| VCC6-Q/R Series 2.5 and 3.3 volt LVPECL Crystal Oscillator Features * 2.5 or 3.3V LVPECL * 3rd Overtone Crystal for best jitter performance * Output frequencies to 270 MHz * Low Jitter < 1 pS rms, 12kHz to 20MHz * Enable/Disable for test and board debug * -10/70 or -40/85 C operating temperature * Hermetically sealed ceramic SMD package * Product is compliant to RoHS directive The VCC6 Crystal Oscillator Applications * SONET/SDH/DWDM * Fiber Channel Enable/Disable * Ethernet, Gigabit Ethernet * Storage Area Network * Digital Video * Broadband Access OUT OUT Output Buffer / Disable Description Vectron's VCC6 Crystal Oscillator (XO) is quartz stabilized square wave generator with a LV-PECL output, operating off a 3.3 volt supply. The VCC6 uses 3rd overtone crystals for frequencies under 200MHz, resulting in low jitter performance, typically 0.3pS rms in the 12 kHz to 20MHz band. Vectron International 267 Lowell Road, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator Performance Characteristics Table 1. Electrical Performance Parameter Frequency Supply Voltage1, 3.3V Q option 2.5V R option Supply Current Output Logic Levels, 0/70C Output Logic High2 Output Logic Low2 Output Logic Levels, -40/85C Output Logic High2 Output Logic Low2 Transition Times Rise Time2 Fall Time2 Symmetry or Duty Cycle3 Operating temperature (ordering option) Stability (ordering option)4 Jitter, 12kHz to 20MHz 5 Cycle to Cycle, rms Cycle to Cycle, peak-peak Period Jitter, rms Period Jitter, peak-peak Output Enabled6 Output Disabled6 Output Enable/Disable time Enable/Disable Leakage Current Output Enable Pull-Up Resistor6 Output Enabled Output Disabled Symbol fO VDD IDD VOH VOL VOH VOL tR tF SYM TOP deltaF/F VDD-1.025 VDD-1.810 VDD-1.085 VDD-1.830 Min 10 3.15 2.375 Typical 3.3 2.5 Maximum 270 3.45 2.625 98 VDD-0.880 VDD-1.620 VDD-0.880 VDD-1.555 600 600 55 Units MHz V mA V V V V ps ps % C ppm pS 45 50 -10/70 or -40/85 25, 50 or 100 0.3 4.8 38 2.7 23 0.7 VIH VIL tE/D IIL 0.7*VDD 0.3*VDD 200 200 33 1 V V nS uA Kohm Mohm 1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible and terminated to ground. 2. Figure 1 defines these parameters. Figure 2 illustrates the operating conditions under which these parameters are tested and specified. 3. Symmetry is measured defined as On Time/Period. 4. Includes calibration tolerance, operating temperature, supply voltage variations, aging (40 degreesC/10 years) and shock and vibration (not under operation). 5. Measurements made on a VCC6-QAB-155M520 using an Agilent E5052A for phase noise and LeCroy 8600, 25K samples for jitter. 6. Output will be enabled if Enable/Disable is left open. The pull resistor changes to a higher value, operating in a "power saving mode" when Enable/Disable is set to a logic 0. tR 80 % Vs 20% tF On Time Period Figure 1. Output Waveform Figure 2. Typical Output Test Conditions (255C) Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator Outline Diagram and Pin Out Table 2. VCC6-QAx Pinout Pin # Symbol 1 NC 2 E/D 3 GND 4 fO 5 Cfo 6 VDD Function This pin has no internal connection and is floating. Enable/Disable Function Ground Output Frequency Complementary Output Frequency Supply Voltage Gold over Nickel plating Figure 3 Optional VCC6-QAx Package Drawing Table 3. VCC6-QCx Pinout Pin # Symbol 1 E/D 2 NC 3 GND 4 fO 5 Cfo 6 VDD Function Enable/Disable Function This pin has no internal connection and is floating. Ground Output Frequency Complementary Output Frequency Supply Voltage Gold over Nickel plating Figure 4. VCC6-QCx and VCC6-QAx Package Drawing Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator Terminating PECL Outputs The VCC6 incorporates a standard PECL output scheme, which are un-terminated emitters as shown in Figure 5. There are numerous application notes on terminating and interfacing PECL logic and the two most common methods are a single resistor to ground, Figure 6, and a pull-up/pull-down scheme as shown in Figure 7. An AC coupling capacitor is optional, depending on the application and the input logic requirements of the next stage. One of the most important considerations is terminating the Output and Complementary Outputs equally. An unused output should not be left un-terminated, and if it one of the two outputs is left open it will result in excessive jitter on both. PC board layout must take this and 50 ohm impedance matching into account. Load matching and power supply noise are the main contributors to jitter related problems. Figure 5. Standard PECL Output Configuration Figure 6. Single Resistor Termination Resistor value are typically: 120 to 240ohms for 3.3V 82 to 120 ohms for 2.5V Figure 7. Pull-up Pull-down Termination Resistor values are typically: 130 and 82 ohms for 3.3V 240 and 62 ohms for 2.5V Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator Enable/Disable Functional Description Under normal operation the Enable/Disable is left open, or set to a logic high state, and the VCC6 is in oscillation mode and outputs are enabled (active). When the E/D is set to a logic low, the oscillator stops and the both the output and complementary outputs are in a high impedance state. This helps facilitate board testing and troubleshooting. Power Saving Pull-Up Resistor The E/D pull-up resistor changes in response to the input logic level; the pull-up resistor is a large value when E/D is set to a logic low, which reduces the current consumed. When E/D is open, or set to a logic high, the pull-up resistance becomes a smaller value which helps decrease the effects of external noise. Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional operation is not implied at these or any other conditions in excess of conditions represented in the operational sections of this data sheet. Exposure to absolute maximum ratings for extended periods may adversely affect device reliability. Table 4. Absolute Maximum Ratings Parameter Symbol Power Supply VDD Enable/Disable VIN Storage Temperature Tstorage Ratings -0.5 to +7.0 -0.5 to VDD+0.5 -55/125 Unit Vdc Vdc C Reliability The VCC6 qualification tests included: Table 5. Environnemental Compliance Parameter Mechanical Shock Mechanical Vibration Solderability Gross and Fine Leak Resistance to Solvents Conditions MIL-STD-883 Method 2002 MIL-STD-883 Method 2007 MIL-STD-883 Method 2003 MIL-STD-883 Method 1014 MIL-STD-883 Method 2016 Handling Precautions Although ESD protection circuitry has been designed into the the VCC6, proper precautions should be taken when handling and mounting. VI employs a Human Body Model and a Charged-Device Model (CDM) for ESD susceptibility testing and design protection evaluation. ESD thresholds are dependent on the circuit parameters used to define the model. Although no industry wide standard has been adopted for the CDM, a standard HBM of resistance = 1.5kohms and capacitance = 100pF is widely used and therefore can be used for comparison purposes. Table 6. ESD Ratings Model Minimum Conditions Human Body Model 1500 MIL-STD-883 Method 3015 Charged Device Model 1000 Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator IR Reflow and Suggested Pad Size Layout The VCC6 has been qualified to meet the JEDEC standard for Pb-Free assembly. The temperatures and time intervals listed are based on the Pb-Free small body requirements and maximum parameters are listed in Table 6, lower temperatures are also acceptable. The VCC6 is hermetically sealed so an aqueous wash is not an issue. Frequencies >200MHz will need to be reflowed at 220C max. Table 7. Reflow Profile (IPC/JEDEC J-STD-020B) Parameter Symbol PreHeat Time tS Ramp Up R UP Time Above 217 oC Time To Peak Temperature Time At 260 oC (max) Time At 240C (max) Ramp Down tL t AMB-P tP tp2 R DN Value 60 sec Min, 200 sec Max 3 oC/sec Max 60 sec Min, 150 sec Max 480 sec Max 10 sec Max 60 sec MAX 6 oC/sec Max Figure 8. IR Reflow Diagram Figure 9. Pad Size Diagram Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator Tape and Reel J F D A E C G B L I H K Figure 10. Tape and Reel Diagram Table 8. Tape and Reel Dimensions (mm) Tape Dimensions Product A VCC6 16 B 7.5 C 1.5 D 4 E 8 Reel Dimensions F G H 2 21 13 I 60 J 2 K 17 L 180 # Per Reel 250 Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com VCC6-Q/R Series, 2.5 and 3.3v PECL Crystal Oscillator Table 9. Standard Frequencies (MHz) 19.440 40.000 64.000 80.000 98.304 125.000 136.000 156.000 160.160 166.6286 171.000 195.3125 27.000 40.680 64.375 83.125 100.000 130.000 143.000 156.250 161.1328 166.6667 173.3707 200.000 27.027 48.000 74.1758 87.000 105.000 130.5882 145.221 156.256 163.235 166.67 175.000 212.500 35.000 50.000 74.250 90.000 106.000 133.000 150.000 156.260 164.3555 167.00 180.000 250.000 37.000 52.300 76.800 91.875 106.250 134.560729 153.500 159.375 165.000 167.3316 187.500 260.000 38.880 62.500 77.760 93.000 110.000 135.000 155.520 160.000 166.000 168.200912 190.000 Other frequencies may be available upon request. Standard frequencies are frequencies which the crystal has been designed and does not imply a stock position. Ordering Information VCC6 - Qxx - xxxMxx Product Family Crystal Oscillator Supply Voltage, Output Q=3.3V, LVPECL R=2.5V, LVPECL Enable/Disable A: E/D is on Pin 2, Pin 1 is a NC C: E/D is on Pin 1, Pin 2 is a NC Frequency MHz example: 125M00= 125.000 Stability Options/Temperature A: 100ppm B: 50ppm C: 100ppm D: 50ppm E: 25ppm F: 25ppm NOTE: Not all combinations of options are available. A 20ppm option over -10/70C 3.3V, VCC6-107-frequency, is also available A 20ppm option over -10/70C 2.5V, VCC6-110-frequency, is also available. For Additional Information, Please Contact: -10 to 70C -10 to 70C -40 to 85C -40 to 85C -10 to 70C -40 to 85C www.vectron.com USA: Vectron International * 267 Lowell Road, Hudson, NH 03051 * Tel: 1-88-VECTRON-1 * Fax: 1-888-FAX-VECTRON EUROPE: Landstrasse, D-74924, Neckarbischofsheim, Germany * Tel: 49 (0) 7268 8010 * Fax: 49 (0) 7268 801281 ASIA: Vectron Asia Pacific Sales 1F~2F. No.8 Workshop No.308 Fenju Rd., WaiGaoQiao Free Trade Zone, Pudong New Area Shanghai, China 200131 *Tel: 8621 50480777 * Fax: 8621 50481881 Vectron International reserves the right to make changes to the product(s) and/or information contained herein without notice. No liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. VCC6-Q/R (REVISION DATE: September 07, 2005) Vectron International 267 Lowell Rd, Hudson NH 03051 Tel: 1-88-VECTRON-1 e-mail: vectron@vectron.com |
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