VFJA915 Jitter Attenuator with 3 Input Frequency Selections plus Free-run Mode RoHS Status Features ¾ ¾ ¾ ¾ 25MHz Output Frequency Wide Lock Range Ultra Low Jitter and Phase Noise: -143 dBc/Hz @ 1KHz Low Power: < 150mW typical Applications ¾ ¾ ¾ Sonet / SDH / ATM 10 Gigabit Ethernet Wireless Infrastructure Description The VFJA915 is a Jitter Attenuator that provides two LVCMOS outputs with a frequency of 25MHz. The device will frequency lock to an input frequency with an error in excess of +/- 130ppm from nominal. Two select inputs [S1,S0] allow the user to select 1 of 3 preset input frequencies or Free-run Mode. In Free-run mode the device outputs a 25MHz clock that is not locked to the input reference frequency. Operating with a +3.3 volt power supply the device typically consumes 150mW. The VFJA915 is available in a 19.5mm x 15.5mm surface mount package. Filter Fout 1 R-Divider F in VCXO PFD Fout 2 S0 S1 N- Divider Vcc Vccp .1 uF Block Diagram 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • Rev_B0209 1 VFJA915 Jitter Attenuator with 3 Input Frequency Selections plus Free-run Mode Absolute Maximum Ratings Parameter Supply Break Down Voltage Storage Temperature Symbol Condition Min Typ Max Unit Vcc -0.5 5.5 V Ts -55 +105° °C Note Electrical Specifications Parameter Output Frequency Range Input Frequency Range Input Level Output Level Logic “1” Output Level Logic “0” Phase Jitter Symbol SSB Phase Noise Фn Condition Min Fout Typ Max Unit 25 MHz 2.5 25.0 125 MHz Fin Slew Rate 2.5V / ns (min) Vin AC coupled internally 0.4 3.3 V p-p Voh IOH = 8 mA Vcc-.6 Vcc V Vol IOL = 8 mA 0.0 0.3 V 12KHz to 20MHz 100Hz 1KHz 10KHz 100KHz ± 130 APR Free-run -40ºC to +85ºC Accuracy Modulation BW @ 50% Duty Cycle Rise / Fall Tr/Tf 20% to 80% Time Start up time Supply Vcc Voltage Icc Input Current Operating Ta Temperature Range Notes: 1. Consult Factory for optional bandwidths 0.20 -120 -143 -153 -163 ± 145 dBc/Hz -40° ppm Hz 55 % 0.6 ns 3 3.15 @ 25 MHz ppm 10 50 See Table 1 ps(rms) ±60 45 Note Note 1 s 3.30 3.45 V 45 55 mA +85° °C 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • Rev_B0209 2 VFJA915 Jitter Attenuator with 3 Input Frequency Selections plus Free-run Mode Environmental and Mechanical Parameter Mechanical Shock Thermal Shock Specification Per MIL-STD-202, Method 213, Condition E Per MIL-STD-883, Method 1011, Condition A Vibration Per MIL-STD-883, Method 2007, Condition A Soldering Conditions 260°C for 10s max Hermetic Seal -8 Leak rate less than 5x10 atm.cc/s of helium (crystal only) Mechanical Outline Connection Diagram Vcc = 3.3V C1 0.1 uF 3 4 Fin 1 12 Fout 1 S1 S0 5 7 11 Fout 2 8 14 Gnd Pin # Description 1 Fin 2 DNC 3 Vccp* 4 Vcc 5 S1 6 DNC 7 S0 8 Gnd 9 N/C 10 N/C 11 Fout 2 12 Fout 1 13 N/C 14 Gnd * Connect pin #3 to pin #4 and add 0.1 uF Table 1 S1:S0 00 01 10 11 Input Frequency (MHz) Free-run Mode 2.5 25.0 125 Output Frequency (MHz) 25.00 25.00 25.00 25.00 75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-5289 • www.valpeyfisher.com • Rev_B0209 3