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MX852BB0030 ultra-low jitter xtal oscillator with fanout clockworks? fusion general description MX852BB0030 cmic? (clock management ic) is a member of the clockworks? fusion family of devices that integrates the crystal, synthesizer and fanout buffers in a single 5mm x 7mm lga package. integrating the entire clock chain delivers 200fs typical phase noise performance including fanout and crosstalk. the device operates from a 2.5v or 3.3v power supply. applications 10/40/400 gigabit ethernet fibre channel 10g/12g serdes features generates 5 output clocks frequency and output logic: -156.25mhz hcsl x 5 integrated quartz crystal for frequency reference typical phase noise: -100fs (integration range: 1.875mhz-20mhz) -200fs (integration range: 12khz-20mhz) complete ultra-low jitter clocking solution oe on banks 1 and 2 2.5v or 3.3v operating voltage range 50ppm total stability -40c to +85c temperature range 38-pin 5mm x 7mm lga package block diagram xo pll n1 n2 q1 /q1 156.25mhz hcsl q2 /q2 156.25mhz hcsl q3 /q3 156.25mhz hcsl oe1 q4 /q4 156.25mhz hcsl q5 /q5 156.25mhz hcsl oe2 clockworks is a registered trademark of micrel, inc micrel inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com 07/13/15 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 ordering information ordering information ordering part number marking line 1 marking line 3 shipping package MX852BB0030 mx852b b0030 tube 38-pin 5mm x 7mm lga MX852BB0030 tr mx852b b0030 tape and reel 38-pin 5mm x 7mm lga devices are green and rohs compliant. sample material may have only a partial top mark. pin configuration MX852BB0030 38-pin 5mm x 7mm lga q2 /q2 dnc q1 /q1 vss vss dnc oe2 dnc vss vdda vdd /q5 q5 dnc vss vdda vdda vdd dnc oe1 dnc dnc dnc dnc dnc dnc vss vss dnc /q3 q3 vddo1 /q4 q4 vddo2 vdd 07/13/15 2 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 pin description pin number pin name pin type pin level pin function 1, 7, 8 vdda pwr analog power supply 2, 9, 38 vdd pwr power supply 3, 4 /q5, q5 o, diff hcsl bank 2 clock output frequency = 156.25mhz 5, 14, 15, 16, 17 18, 19, 21, 23, 28, 31 dnc do not connect anything to these pins. 6, 24, 25 epad vss (exposed pad) pwr power supply ground. the exposed pad must be connected to the vss ground plane. 10 dnc do not connect 11 oe1 i, se lvcmos output enable, bank 1 outputs disable to tri-state, 0 = disabled, 1 = enabled, 45k ohms pull-up 12, 13, 20 vss pwr crystal ground 22 oe2 i, se lvcmos output enable, bank 2 outputs disable to tri-state, 0 = disabled, 1 = enabled, 45k ohms pull-up 26, 27 /q1, q1 o, diff hcsl bank 1 clock output frequency = 156.25mhz 29, 30 /q2, q2 o, diff hcsl bank 1 clock output frequency = 156.25mhz 32, 33 /q3, q3 o, diff hcsl bank 1 clock output frequency = 156.25mhz 34 vddo1 pwr power supply for the outputs on bank 1 35, 36 /q4, q4 o, diff hcsl bank 2 clock output frequency = 156.25mhz 37 vdd02 pwr power supply for the outputs on bank 2 07/13/15 3 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 absolute maximum ratings1 supply voltage (vdda, vdd, vddox)...............+4.6v input voltage (vin).......................-0.5v to vdd + 0.5v lead temperature (soldering, 20s).........................260c storage temperature (t )......................-65c to +150c s operating ratings2 supply voltage (vddox, vdd, vdda) ........+2.375v to +3.465v ambient temperature (ta).................-40c to +85c junction thermal resistance lga (t ) still air....................................38.5c/w ja electrical characteristics3 vdd = vdda = vddo1 = vddo2 = 3.3v 5% or 2.5v 5% vdd = vdda = 3.3v 5%, vddo1 = vddo2 = 3.3v 5% or 2.5v 5% ta = -40c to +85c, unless otherwise noted. symbol parameter condition min. typ. max. units vddx 2.5v operating voltage 3.3v operating voltage 2.375 3.135 2.5 3.3 2.625 3.465 v idd core supply current outputs not loaded 210.36 ma fo output frequency bank 1 and 2 156.25 mhz fstability frequency stability note 4. frequency stability over temperature total stability 20 50 ppm tstart start-up time 20 ms tskew output-to-output skew note 5 50 ps tr/tf output rise/fall time 20% - 80% hcsl ouput 150 300 450 ps odc output duty cycle <350mhz output frequencies 48 50 52 % tjit(?) rms phase noise 156.25mhz hcsl integration range (12khz-20mhz) integration range (1.875mhz-20mhz) integration range (12khz-40mhz) 162 73 260 fs period jitter pk-pk (e5001a, 100hz-40mhz) rms (e5001a, 100hz-40mhz) pk-pk (10k samples, dsa80000b) 1.6 135 5 5 10 ps fs ps lvcmos inputs dc electrical characteristics (oe1, oe2) 3 vdd = 3.3v 5% or 2.5v 5%, ta = -40c to +85c symbol parameter condition min. typ. max. units vih input high voltage 2 vdd + 0.3 v vil input low voltage -0.3 0.8 v iih input high current vdd = vin = 3.465v 150 a iil input low current vdd = 3.465v, vin = 0v -150 a notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum rating conditions for extended periods may affect device reliability. 2. the datasheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. the circuit is designed to meet the ac and dc specifications shown in the electrical characteristics table after thermal equilibrium has been established. 4. inclusive of temperature drift, aging, initial accuracy, shock, and vibration. operating temperature range dependent on part number configuration. 5. skew between output buffers. measured at the output differential crossing points. applies to outputs at the same supply voltage using same output format. 07/13/15 4 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 hcsl dc electrical characteristics 3 vdd = vddo1 = vddo2 = 3.3v 5% or 2.5v 5% vdd = 3.3v 5%, vddo1 = vddo2 = 3.3v 5% or 2.5v 5% ta = -40c to +85c, rl = 50 ohms to vss symbol parameter condition min. typ. max. units voh output high voltage 660 700 850 mv vol output low voltage -150 0 27 mv vcross crossing point voltage 250 350 550 mv 07/13/15 5 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 application information output traces design the traces for the output signals according to the output logic requirements. if lvcmos is unterminated, add a 30 ohms resistor in series with the output, as close as possible to the output pin and start a 50 ohms trace on the other side of the resistor. for differential traces you can either use a differential design or two separate 50 ohms traces. for emi reasons, it is better to use a balanced differential design. lvds can be ac coupled or dc coupled to its termination. power supply decoupling place the smallest value decoupling capacitor (4.7nf below) between the vdd and vss pins, as close as possible to those pins and at the same side of the pcb as the ic. the shorter the physical path from vdd to capacitor and back from capacitor to vss, the more effective the decoupling. use one 4.7nf capacitor for each vdd pin. the impedance value of the ferrite bead (fb) needs to be between 240 ohms and 600 ohms with a saturation current >=150ma. the vddo1 and vddo2 pins connect directly to the vdd plane. all vdd pins connect to vdd after the power supply filter. power supply filtering recommendations preferred filter, using micrel mic94300 or mic94310 ripple blocker: alternative, traditional filter, using a ferrite bead: figure 1. vdda (analog) traditional pi filter figure 2. recommended power supply filtering figure 3. recommended decoupling for each vddo 07/13/15 6 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 timing diagrams figure 4. duty cycle timing figure 5. all outputs rise/fall time rms phase/noise/jitter figure 6. rms phase/noise/jitter 07/13/15 7 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7 output termination figure 7. hcsl output load and test circuit
micrel, inc. MX852BB0030 figure 8. 156.25mhz hcsl output, 12khz-20mhz 162fs figure 9. 156.25mhz hcsl output, 1.875mhz-20mhz 73fs 07/13/15 8 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 figure 10. 156.25mhz hcsl output, 12khz-40mhz 260fs 07/13/15 9 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 figure 11. tie jitter (10k samples) figure 12. tie jitter (10k samples) 07/13/15 10 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7
micrel, inc. MX852BB0030 package information and recommended land pattern for 38-pin lga 6 38-pin 5mm x 7mm lga note: 6. package information is correct as of the publication date. for updates and most current information, go to www.micrel.com. micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for its use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. except as provided in micrel's terms and conditions of sale for such products, micrel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. micrel products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. a purchaser's use or sale of micrel products for use in life support appliances, devices or systems is a purchaser's own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2015 micrel, incorporated. 07/13/15 11 m9999-071315-a tcghelp@micrel.com or (408) 955-1690 mx852b-1479-rev 0.7

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