preliminary data sheet fx-424 low jitter frequency translator features ? quartz-based pll for ultra-low jitter ? frequency translation up to 850 mhz ? accepts up to 4 externally-muxed clock inputs ? cmos / lvds / lvpecl inputs compatible ? differential lvpecl or lvcmos output ? lock detect / loss of signal alarms ? output disable ? 20.3 x 13.7 x 5.1 mm surface mount package description the fx-424 is a precision quartz-based frequency translator used to translate an input frequency such as 8 khz, 1.544 mhz, 2.048 mhz, 19.44 mhz etc. to any specific frequency from 1.544 mhz to 850 mhz. the fx-424 can perform either up or down frequency conversion. the fx-424?s superior jitter performance is achieved through the use of a precision vcxo or vcso. with the use of an external multiplexer, up to 4 different input clocks can be translated to a common output frequency. applications description standard ? 1-2-4 gigabit fc incits 352-2002 ? 10 gigabit fc incits 364-2003 ? 10gbe lan / wan ieee 802.3ae ? oc-192 itu-t g.709 ? sonet / sdh gr-253-core issue 3 ? fec (forward error correction) scaling figure 1. functional block diagram
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 2 table 1. electrical performance parameter symbol minimum typical maximum units notes frequency input frequency capture range output frequency f in apr f out 0.008 40 1.544 170 850 mhz ppm mhz 1,2,3 1,2,3 1,2,3 supply voltage current (no load) v cc i cc 3.13 3.3 45 3.46 60 v ma 2,3 3 lvcmos input input high voltage input low voltage v ih v il 2 -0.3 v cc 0.8 v v 2,3 lvpecl input input high voltage input low voltage v ih v il 1.49 0.86 2.72 2.125 v v 6 6 lvcmos output (option a ) lvcmos 2,3 differential output (option f ) common mode output voltage output high voltage output low voltage peak-to-peak output voltage rise time fall time symmetry v ocm v oh v ol v p-p t r t f sym v cc -1.5 v cc -1.025 v cc -1.810 45 v cc -1.3 v cc -0.950 v cc -1.700 700 0.5 0.5 50 v cc -1.1 v cc -0.880 v cc -1.620 55 v v v mv-pp ns ns % 2,3 2,3 2,3 2,3 4,5 4,5 2,3 ssb phase noise, f out = 155.52/622.08 @ 10 hz offset @ 100 hz offset @ 1 khz offset @ 10 khz offset @ 100 khz offset @ 1 mhz offset @ 10 mhz offset n n n n n n n -64/-27 -95/-55 -123/-85 -143/-110 -146/-130 -146/-146 -146/-146 dbc/hz dbc/hz dbc/hz dbc/hz dbc/hz dbc/hz dbc/hz 5 operating temperature t op -40 85 c 1,3 1. see standard frequencies and ordering information. 2. parameters are tested with production test circuit below (fig 2). 3. parameters are tested at ambient temperature with test limits guardbanded for specified operating temperature. 4. measured from 20% to 80% of a full output swing (fig 3). 5. not tested in production, guaranteed by design, verified at qualification. figure 2. test circuit figure 3. lvpecl waveform
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 3 figure 4. pin configuration table 2. pin out pin # symbol i/o level function 1 sel0 i lvttl input frequency select* 2 sel1 i lvttl input frequency select* 3 gnd gnd supply case and electrical ground 4 not present 5 vmon o analog vcxo control voltage monitor under locked conditions vmon should be > 0.3v and <3.0v. the input frequency may be out of range if t he voltage exceeds these levels. 6 od i lvcmos output disable disabled = logic ?1? enabled = logic ?0? or no connect 7 gnd gnd supply case and electrical ground 8 fout o lvpecl or lvcmos frequency output 9 cfout o or gnd lvpecl or lvcmos complementary frequency output ? no te for lvcmos option this pad will be tied to gnd. 10 ld o lvcmos lock detect locked = logic ?1? loss of signal = logic ?0? 11 gnd gnd supply case and electrical ground 12 gnd gnd supply case and electrical ground 13 fin i lvcmos or lvpecl input frequency. the fx-424 series ac couples the input for handling of either lvcmos or lvpecl input signals. 14 vcc vcc supply power supply voltage (3.3 v 5%) * for applications requiring two to four input frequencie s, vectron will assign a unique part number and the input frequency versus sel[1:0] settings will be provided in a specification control drawing. for single input conf igurations it is recommended that sel0 and sel1 are tied to ground.
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 4 outline diagram suggested pad layout figure 5. figure 6. table 3. absolute maximum ratings parameter symbol ratings unit power supply v cc 0 to 6 v output current i out ma storage temperature ts -55 to 125 c soldering temp/time t ls 220/10 c/sec 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 ex tended periods may adversely affect device reliability. reliability vi qualification includes aging at various extreme temperat ures, shock and vibration, temperature cycling, and ir reflow simulation. the fx-424 family is undergoing the following qualification tests: environmental compliance parameter conditions mechanical shock mil-std-883, method 2002 mechanical vibration mil-std-883, method 2007 solderability mil-std-883, method 2003 gross and fine leak mil-std-883, method 1014 resistance to solvents mil-std-883, method 2016
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 5 eliability handling precautions although esd protection circuitry has been designed into the fx-424 proper precautions should be taken when handling and mounting. vi employs a human body model (hbm) and a charged-device model (cdm) for esd susceptibility testing and de sign protection evaluation esd ratings model minimum conditions human body model 500 v mil-std 883, method 3015 charged device model 500 v jedec, jesd22-c101 recommended solder reflow profile note: the fx-424 should not be subjected to a wash proce ss that will immerse it in solvents. no clean is the recommended procedure. the fx-424 has been designed for pick and place reflow soldering. the suggested reflow profile is shown above. the fx-422/3 series may be reflowed once and should not be reflowed in the inverted position. this profile shows a ramp up condition to prevent thermal sh ock, a preheat period in which the flux is activated, a ramp up to 183 c which is the reflow temperature of sn/pb eut ectic, and a gradual cool down. the time above 183 c should not exceed 60 seconds and the pea k temperature should be no more than 220 c for 10 seconds. the fx-424 should not be exposed to an aqueous wash. 60 60-90 45-60 150 183 220 time (s) temperature (deg c)
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 6 application circuits gnd gnd gnd gnd figure 7. single input frequency translation gnd gnd gnd gnd sel0 sel1 figure 8. four input frequencies translated to common output frequency
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 7 tape and reel (eia-481-2-a) tape dimensions (mm) reel dimensions (mm) dimension w f do po p1 a b c d n w1 w2 # per tolerance typ typ typ typ typ typ min typ min min typ max reel fx-424 44 20.2 1.5 4 20 330 1.5 13 20.2 100 44.4 50.4 vectron plans to offer both tape-n-reel and matrix tray s as packaging options for the fx-424. the standard shipping container for volume production is a matrix tray. the trays are 100% recyclable and offer the added feature that they can be continuous ly fed into a pick-n-place machine. (matrix tray drawing not currently available) po w a n f p1 w1 w2 c b d ?do
fx-424 low jitter fr equency translator vectron international ? 267 lowell road, hudson, nh 03051 ? tel: 1-88-vectron-1 ? web: www.vectron.com 8 standard frequencies 8 khz c 26.00 mhz t 622.08 mhz 8 16 khz d 27.00 mhz w 666.5143 mhz 9 64 khz e 38.88 mhz x 1.024 mhz f 44.736 mhz y 1.544 mhz h 51.84 mhz 0 2.048 mhz j 61.44 mhz 1 4.096 mhz k 77.76 mhz 2 8.192 mhz l 82.944 mhz 3 13.000 mhz m 112.000 mhz 4 16.384 mhz n 139.264 mhz 5 19.440 mhz p 155.520 mhz 6 20.480 mhz r 166.6286 mhz 7 special scd s not all combinations are possible. ordering information for additional information, please contact: 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 pro duct(s) or information . rev: 2.7.2005 usa: vectron international, 267 lowell rd, hudson, nh 03051 . . . . tel: 1-88- v ectron-1 fax: 1-888-fax- v ectron europe: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . tel: +49 (0) 3328-4784-17 fax: +49 (0) 3328-4784-30 asia: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . tel: +86-21-28909740 fax: +86-21-28909240
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