v ectron international 267 lowell road , hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com vcc6 - q series 3 . 3 volt lv pecl crystal oscillator , output frequencies > 270mhz the vcc6 crystal oscillator features 3 . 3 v lvpecl output f requencies from 270 to 80 0 mhz enable/disable for test and board debug - 1 0/70 or ? 40/85 c operating temperature hermetically sealed ceramic smd package product is compliant to rohs directive and fully compatible with lead free assembly applications sonet/sdh /dwdm fiber channel ethernet, gigabit ethernet storage area network digital video broadband access 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 . out output buffer / disable enable/disable out
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 2 7 0mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com performance characteristics table 1. electrical performance parameter symbol min typical maximum units frequency f o 270 80 0 mhz supply voltage 1 , v dd 3.15 3.45 v supply current i dd 100 ma outpu t logic levels, - 1 0/70 c output logic high 2 output logic low 2 v oh v ol v dd - 1.025 v dd - 1.810 v dd - 0.880 v dd - 1.62 0 v v output logic levels, - 40/85 c output logic high 2 output logic low 2 v oh v ol v dd - 1.085 v dd - 1.830 v dd - 0.880 v dd - 1.555 v v transition times rise time 2 fall time 2 t r t f 600 600 ps ps symmetry or duty cycle 3 sym 45 50 55 % operating temperature ( ordering option ) t op - 10/70 or ? 40/85 c stability ( ordering option) 4 deltaf/f 20, 25, 50 or 100 ppm jitter, 12 khz to 20mhz 5 period rms jitter period p/p jitter 2 4 30 p s output enabled 6 v ih 0.7*v dd v output disabled 6 v il 0.3*v dd v enable/disable leakage current i il 200 ua output enable pull - up resistor 6 1 00 1. a 0.01uf and a 0.1uf capacitor sh ould 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 t hese parameters are tested and specified. 3. symmetry is measured defined as o n 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 - 6 2 2 m0 8 0 using a lecroy 8600, 25k samples. 6 . output will be enabled if enable/disable is left open. figure 1. output waveform figure 2. typical output test conditions (25 5c ) 80 % vs 20 % t f t r period on time
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 2 7 0mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com table 2. vcc6 - qax pinout pin # symbol function 1 nc this pin has no internal con nection and is floating. 2 e/d enable/disable f unction 3 gnd ground 4 f o output frequency 5 cf o complementary output frequency 6 v dd supply voltage table 3. vcc6 - qcx pinout pin # symbol function 1 e/d enable/disable f unction 2 nc this pin ha s no internal connection and is floating. 3 gnd ground 4 f o output frequency 5 cf o complementary output frequency 6 v dd supply voltage contact pads are gold over nickel plating figure 3 . vcc6 - qcx package drawing
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 2 7 0mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com terminating pecl outputs the v cc6 incorporates a standard pecl output scheme, which are un - term i nated emitters as shown in figure 4 . there are numerous application notes on terminating and interfacing pecl logic and the two most common methods are a single resistor to ground, figure 5 , and a pull - up/pull - down scheme as shown in figure 6 . 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 complemen tary outputs equally. an u nused out put 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 4 . standard pecl output configuration figure 5 . single resistor termination figure 6 . pull - up pull - down termination resistor value are typically : res istor values are typically: 120 to 240ohms for 3.3v 130 and 82 ohms for 3.3v
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 2 7 0mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com enable/disable functional description under normal operation the enable / disable is left open , or set to a logic high state , and the vcc6 is oscillating . 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. absolute maximum ratings stresses in excess of the absolute max imum 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 perio ds may adversely affect device reliability. table 4 . absolute maximum ratings parameter symbol ratings unit power supply v dd - 0.5 to + 4.6 vdc enable/disable v in - 0.5 to v dd +0.5 vdc storage temperature tstorage - 55/125 c reliability the vcc6 qual ification tests included : table 5 . environnemental 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 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 resistan ce = 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 1 5 00 mil - std - 883 method 3 0 15 charged device model 1 5 00
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 270mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com ir reflow and suggested p ad 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 parameters are listed in table 7 . the v cc6 is hermetically seale d so an aqueous wash is not an issue. table 7 . reflow profile (ipc/jedec j - std - 020b) parameter symbol value preheat time t s 6 0 sec min, 20 0 sec max ramp up r up 3 o c/sec max time above 217 o c t l 60 sec min, 150 sec max time to peak temperature t amb - p 480 sec max time at 2 6 0 o c (max) t p 1 0 sec max ramp down r dn 6 o c/sec max figure 7 . ir reflow diagram figure 8 . pad size diagram
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 270mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com a e c d b g f j l i k h tape and reel figure 9 . tape and reel diagram table 8 . tape and reel dimensio ns (mm) tape dimensions reel dimensions # per product a b c d e f g h i j k l reel vcc6 1 6 7 .5 1.5 4 8 2 21 13 60 2 17 18 0 250
vcc6 - q 3.3v lv pecl crystal oscillator , output frequencies > 270mhz vectron international 2 6 7 lowell rd, hudson nh 0 3051 tel : 1 - 88 - vectron - 1 e - mail: vectron@vectron.com table 9. frequencies (mhz) 311.040 312.500 320.000 322.2656 332.000 333.000 350.000 400.000 446.000 472.000 500.000 600.000 622.080 625.000 644.5313 666.5413 669.3236 693.3265 693.4829 693.750 700.000 779.5686 other frequencies may be available upon request. standard frequencies are frequencies which the crystal has been designed and does not imply a stock posit ion. ordering information vcc6 ? qx x ? x xx m xx product family frequency mhz crystal oscillator example : 6 25 m 00 = 6 25 . 000 mhz supply voltage, output s ta bility options/temperature q = 3.3 v , pecl a : 10 0 ppm - 1 0 to 70 c b: 50ppm - 10 to 70 c enable/disable c: 100ppm - 40 to 85 c a : e/d is on pin 2 , pin 1 is a nc d: 50ppm - 40 to 85 c c: e/d is on pin 1 , pin 2 is a nc e: 25ppm - 10 to 70 c f: 25ppm - 40 to 85 c note : not all combin ations of options are available. a +/ - 20ppm over - 10/70 c, vcc6 - 107 - frequency , is also available. www.vectron.com vectron international reserves the right to make changes to the product(s) and/or information contained herein without notice. no l iability 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 2 7 0mhz (revision date: september7 , 200 5 ) for additional information, please contact: usa: vectron international 267 lowell road, hudson, nh 03051 tel: 1 - 88 - vectron - 1 fax: 1 - 888 - fax - vectron euro pe: 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
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