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| CRYSTAL CLOCK OSCILLATORS LVCMOS Data Sheet K2385 Rev. A SC-C1420 Series Description The SC-C1420 Series of quartz crystal oscillators provide enable/disable 3-state LVCMOS compatible signals for bus connected systems. Supplying Pin 1 of the SC-C1420 units with a logic "1" or open enables its Pin 3 output. In the disable mode, Pin 3 presents a high impedance to the load. Features * Wide frequency range-4.0MHz to 70.0MHz * User specified tolerance available * Space-saving alternative to discrete component oscillators * 1.8 Volt operation * High shock resistance, to 1000g * High Reliability - NEL HALT/HASS qualified for crystal oscillator start-up conditions * Low Jitter - Wavecrest jitter characterization available * No internal PLL avoids cascading PLL problems * Metal lid electrically connected to ground to reduce EMI * Gold plated pads * RoHS Compliant, Lead Free Construction Electrical Connection Pin 1 2 3 4 Connection Enable/Disable Ground Output VDD 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com CRYSTAL CLOCK OSCILLATORS SC-C1420 Series LVCMOS Continued Data Sheet K2385 Rev. A Operating Conditions and Output Characteristics Electrical Characteristics Parameter Frequency Duty Cycle Logic 0 Logic 1 Rise & Fall Time Jitter, RMS(2) Tpz Enable Voltage Disable Voltage Frequency Stability (1) Symbol Conditions ------------@ VDD/2 VOL @ 600A VOH @ 600A tr,tf 10-90%VO --------------------------------dF/F Overall conditions including: voltage, calibration, temp.. 10 year aging, shock, vibration Min 4.0MHz 45/55% ----VDD-0.2V ------------2.0V -----100ppm Typical --------------------3 psec ----------------Max 70.0MHz 55/45% 0.2V ----8.0 ns ----25 ns ----0.8V +100ppm General Characteristics Parameter Supply Voltage (3) VDD Supply Current Output current Operating temperature Storage temperature Power Dissipation Solder temperature Load Start-up Time Symbol IDD IO TA TS PD TL ----ts Conditions 1.8V0.1V 1.7V No Load Low level Output Current -------------4 minutes ----20MHz or greater Less than 20MHz Min 1.8V 0.0 mA 0.0 mA 0C -55C --------------------------------------------------------Typical 1.9V 40 mA 16.0 mA 70C 125C 76 mW 253C 15pf 10 ms 2 ms Max Environmental and Mechanical Characteristics Mechanical Shock Thermal Shock Vibration Hermetic Seal Per MIL-STD-202, Method 213, Condition E Per MIL-STD-883, Method 1011, Condition A 0.060" double amplitude 10 Hz to 55 Hz, 35g's 55Hz to 2000 Hz Leak rate less than 1 x 10-8 atm.cc/sec Footnotes: 1) Standard frequency stability (20,25,50ppm & others available) 2) Jitter performance is frequency dependent. Please contact factory for full Wavecrest characterization. 3) External high frequency power supply decoupling required. Creating a Part Number SC - C142X - FREQ Package Code SC 4 pad 5x7mm SMD Tolerance/Performance 0 100ppm 0-70C 1 50ppm 0-70C 7 25ppm 0-70C 9 Customer Specific A 20ppm 0-70C B 50ppm -40 to +85C C 100ppm -40 to +85C Input Voltage Code Specification A 3.3V B 2.5V C 1.8V 5V 357 Beloit Street, P.O. Box 457, Burlington, WI 53105-0457 U.S.A. Phone 262/763-3591 FAX 262/763-2881 Email: nelsales@nelfc.com www.nelfc.com |
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