VCC1-1544-50M0000000 CMOS Crystal Oscillator VCC1 Description Vectrons VCC1 Crystal Oscillator (XO) is a quartz stabilized square wave generator with a CMOS output. The VCC1 uses a fundamental or 3rd overtone crystal resulting in very low jitter performance, and a monolithic IC which improves reliability and reduces cost. Features Applications Ultra Low Jitter, Fundamental or 3rd OT Crystal Design SONET/SDH/DWDM CMOS Output Crystal Oscillator Ethernet, GE, SynchE Output Frequency 50 MHz Storage Area Networking 3.3V Operation Fiber Channel Output Disable Feature Digital Video Excellent 50ppm overall stability Broadband Access -40/85C operating temperature Base Stations, Picocells Small Industry Standard Package, 5x7mm Driving A/Ds, D/As, FPGAs Test and Measurement Product is compliant to RoHS directive COTS and fully compatible with lead free assembly Block Diagram V Output DD Crystal Oscillator GND E/D Vec tron I nter national 267 Lowell R oad, Hudson, NH 03051 Tel: 1-88-VEC TR ON-1 Performance Specifications Table 1. Electrical Performance Parameter Symbol Mininum Typical Maximum Units Supply 1 Voltage V 2.97 3.3 3.63 V DD Maximum Voltage -0.5 5 V 2 Current I 20 mA DD Current, Output Disabled 30 uA Frequency Nominal Frequency f 50 MHz N 4 Stability , 50, ppm Outputs 2 Output Logic Levels Output Logic High V 0.9*V V OH DD Output Logic Low V 0.1*V V OL DD Output Logic High Drive I 8 mA OH Output Logic Low Drive I 8 mA OL Load I 15 pF OUT 2 Output Rise /Fall Time t /t 4 ns R F 2,5 Output Leakage, Output Disabled I 10 uA Z 2,5 Duty Cycle 45 50 55 % RMS Jitter, 12k-20M J 100 fs Enable/Disable 7 Output Enable/Disable Output Enable V 2.0 V IH Output Disable V 0.5 V IL Disable time t 100 ns D Enable Internal Pull-Up Resistor 100 Kohm Start-Up Time t 10 ms SU Operating Temp, (Ordering Option) T -40/85 C OP 1 The power supply should have by-pass capacitors as close to the supply and to ground as possible, for example 0.1 and 0.01uF 2 Parameters are tested with the test circuit shown in Figure 1. 3 See Ordering Information tables for more specific information 4 Includes initial accuracy, operating temperature, supply voltage, shock and vibration (not under operation) and 10 years aging. 5 D ut y Cycle is measured as On Time/Per iod, see Fig 2. 6 Broadband Per iod Jitter measured using a LeCroy Wavemaster 8600A, 90K samples, see Application Note for Typical Phase Noise and Jitter Per for mance 7 The Output is Enabled if the Enable/Disable is left open. Vec tron I nter national 267 Lowell R oad, Hudson, NH 03051 Tel: 1-88-VEC TR ON-1