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? semiconductor components industries, llc, 2011 august, 2011 ? rev. p2 1 publication order number: asm3p622s00/d asm3p622s00b, asm3p622s00e product preview low frequency timingsafe peak emi reduction ic description asm3p622s00b/e is a versatile, 3.3 v zero ? delay buffer designed to distribute low frequency timing ? safe clocks with peak emi reduction. asm3p622s00b is an eight ? pin version, accepts one reference input and drives out one low ? skew timing ? safe clock. asm3p622s00e accepts one reference input and drives out eight low ? skew timing ? safe clocks. asm3p622s00b/e has an ss% that selects 2 different deviation and associated input ? output skew (tskew). refer to spread spectrum control and input ? output skew table for details. asm3p622s00e has a clkout for adjusting the input ? output clock delay, depending upon the value of capacitor connected at this pin to gnd. asm3p622s00b/e operates from a 3.3 v supply and is available in two different packages, as shown in the ordering information table, over commercial and industrial temperature range. application asm3p622s00b/e is targeted for use in displays and memory interface systems. features ? low frequency clock distribution with timing ? safe peak emi reduction ? input frequency range: 4 mhz ? 20 mhz ? 2 different spread selection options ? spread spectrum can be turned on/off ? external input ? output delay control option ? supply voltage: 3.3 v 0.3 v ? commercial and industrial temperature range ? packaging information: asm3p622s00b: 8 pin soic, and tssop asm3p622s00e: 16 pin soic, and tssop ? the first true drop ? in solution ? these devices are pb ? free, halogen free/bfr free and are rohs compliant this document contains information on a product under development. on semiconductor reserves the right to change or discontinue this product without notice. http://onsemi.com see detailed ordering and shipping information in the package dimensions section on page 12 of this data sheet. ordering information tssop ? 8 t suffix case 948al soic ? 8 s suffix case 751bd tssop ? 16 t suffix case 948an soic ? 16 s suffix case 751bg
asm3p622s00b, asm3p622s00e http://onsemi.com 2 figure 1. general block diagram ss% dly_ctrl vdd gnd sson pll clkin clkout(s)* (timing ? safe) *for asm3p622s00e ? 8 clkouts spread spectrum frequency generation the clocks in digital systems are typically square waves with a 50% duty cycle and as frequencies increase the edge rates also get faster. analysis shows that a square wave is composed of fundamental frequency and harmonics. the fundamental frequency and harmonics generate the energy peaks that become the source of emi. regulatory agencies test electronic equipment by measuring the amount of peak energy radiated from the equipment. in fact, the peak level allowed decreases as the frequency increases. the standard methods of reducing emi are to use shielding, filtering, multi ? layer pcbs, etc. these methods are expensive. spread spectrum clocking reduces the peak energy by reducing the q factor of the clock. this is done by slowly modulating the clock frequency. the asm3p622s00b/e uses the center modulation spread spectrum technique in which the modulated output frequency varies above and below the reference frequency with a specified modulation rate. with center modulation, the average frequency is the same as the unmodulated frequency and there is no performance degradation. zero delay and skew control all outputs should be uniformly loaded to achieve zero delay between input and output. since the clkout pin is the internal feedback to the pll, its relative loading can adjust the input ? output delay. for applications requiring zero input ? output delay, all outputs, including clkout, must be equally loaded. even if clkout is not used, it must have a capacitive load equal to that on other outputs, for obtaining zero input ? output delay. timing ? safe technology timing ? safe technology is the ability to modulate a clock source with spread spectrum technology and maintain synchronization with any associated data path.
asm3p622s00b, asm3p622s00e http://onsemi.com 3 pin configuration for asm3p622s00b 8 7 6 5 nc vdd clkout sson 1 2 3 4 clkin nc ss% gnd asm3p622s00b table 1. pin description for asm3p622s00b pin # pin name type description 1 clkin (note 1) i external reference clock input , 5 v tolerant input 2 nc no connect 3 ss% (note 3) i spread spectrum selection. has an internal pull up resistor 4 gnd p ground 5 sson (note 3) i spread spectrum enable and disable option. when sson is high, the spread spectrum is enabled and when low, it turns off the spread spectrum. has an internal pull up resistor. 6 clkout (note 2) o buffered clock output (note 4) 7 vdd p 3.3 v supply 8 nc no connect 1. weak pull down 2. weak pull ? down on all outputs 3. weak pull ? up on these inputs 4. buffered clock output is timing ? safe
asm3p622s00b, asm3p622s00e http://onsemi.com 4 pin configuration for asm3p622s00e 16 15 14 13 12 11 10 9 clkout clkout7 clkout6 vdd gnd clkout5 clkout4 sson asm3p622s00e 1 2 3 4 5 6 7 8 clkin clkout1 vdd ss% gnd clkout2 clkout3 dly_ctrl table 2. pin description for asm3p622s00e pin # pin name type description 1 clkin (note 5) i external reference clock input, 5 v tolerant input 2 clkout1 (note 6) o buffered clock output (note 8) 3 v dd p 3.3 v supply 4 ss% (note 7) i spread spectrum selection. refer to spread spectrum control and input ? output skew table. has an internal pull up resistor. 5 gnd p ground 6 clkout2 (note 6) o buffered clock output (note 8) 7 clkout3 (note 6) o buffered clock output (note 8) 8 dly_ctrl o external input ? output delay control. 9 sson (note 7) i spread spectrum enable and disable option. when sson is high, the spread spectrum is enabled and when low, it turns off the spread spectrum. has an internal pull up resistor. 10 clkout4 (note 6) o buffered clock output (note 8) 11 clkout5 (note 6) o buffered clock output (note 8) 12 gnd p ground 13 v dd p 3.3 v supply 14 clkout6 (note 6) o buffered clock output (note 8) 15 clkout7 (note 6) o buffered clock output (note 8) 16 clkout (note 6) o buffered clock output (note 8) 5. weak pull down 6. weak pull ? down on all outputs 7. weak pull ? up on these inputs 8. buffered clock output is timing ? safe table 3. spread spectrum control and input ? output skew table device input frequency ss % deviation input ? output skew ( t skew ) asm3p622s00b/e 12 mhz 0 0.25 % 0.0625 (note 9) 1 0.50 % 0.125 (note 9) 9. t skew is measured in units of the clock period
asm3p622s00b, asm3p622s00e http://onsemi.com 5 table 4. absolute maximum ratings symbol parameter rating unit vdd supply voltage to ground potential ? 0.5 to +4.6 v vin dc input voltage (clkin) ? 0.5 to +7 v t stg storage temperature ? 65 to +125 c t s max. soldering temperature (10 sec) 260 c t j junction temperature 150 c t dv static discharge voltage (as per jedec std22 ? a114 ? b) 2 kv stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above t he recommended operating conditions is not implied. extended exposure to stresses above the recommended operating conditions may af fect device reliability. table 5. operating conditions parameter description min max unit vdd supply voltage 3.0 3.6 v t a operating temperature (ambient temperature) ? 40 +85 c c l load capacitance 30 pf c in input capacitance 7 pf table 6. electrical characteristics parameter description test conditions min typ max unit v il input low voltage (note 10) 0.8 v v ih input high voltage (note 10) 2.0 v i il input low current v in = 0 v 50 a i ih input high current v in = vdd 100 a v ol output low voltage (note 11) i ol = 8 ma 0.4 v v oh output high voltage (note 11) i oh = ? 8 ma 2.4 v i dd supply current unloaded outputs 18 ma z o output impedance 23 10. clkin input has a threshold voltage of vdd/2 11. parameter is guaranteed by design and characterization. not 100% tested in production table 7. switching characteristics for asm3p622s00b/e parameter test conditions min typ max unit input frequency 4 20 mhz output frequency 30 pf load 4 20 mhz duty cycle = (t 2 / t 1 ) * 100 (notes 12, 13) measured at vdd/2 40 50 60 % output rise time (notes 12, 13) measured between 0.8 v and 2.0 v 2.5 ns output fall time (notes 12, 13) measured between 2.0 v and 0.8 v 2.5 ns output ? to ? output skew (notes 12, 13) all outputs equally loaded with ssoff 250 ps delay, clkin rising edge to clkout rising edge (note 13) measured at vdd/2 with ssoff 350 ps device ? to ? device skew (note 13) measured at vdd/2 on the clkout pins of the device 700 ps cycle ? to ? cycle jitter (notes 12, 13) loaded outputs < 8 mhz 1.6 ns > 8 mhz 200 ps pll lock time (note 13) stable power supply, valid clock presented on clkin pin 1.0 ms 12. all parameters specified with 30 pf loaded outputs. 13. parameter is guaranteed by design and characterization. not 100% tested in production.
asm3p622s00b, asm3p622s00e http://onsemi.com 6 switching waveforms figure 2. duty cycle timing output v dd /2 t 2 t 1 v dd /2 v dd /2 figure 3. all outputs rise/fall time 0 v 3.3 v output 2 v 0.8 v t 3 t 4 0.8 v 2 v figure 4. output ? output skew output output v dd /2 v dd /2 t 5 figure 5. input ? output propagation delay t 6 output input v dd /2 v dd /2 figure 6. device ? device skew clkout, device 1 clkout, device 2 t 7 v dd /2 v dd /2
asm3p622s00b, asm3p622s00e http://onsemi.com 7 t skew represents input ? output skew when spread spectrum is on for example, t skew = 0.125 for an input clock 12 mhz, translates in to (1/12 mhz) * 0.125 = 10.41 ns figure 7. input ? output skew t skew ? t skew+ input timing ? safe output one clock cycle n = 1 figure 8. test circuit gnd load clkout output +3.3 v +3.3 v v dd v dd 0.1 f 0.1 f figure 9. typical example of timing ? safe waveform
asm3p622s00b, asm3p622s00e http://onsemi.com 8 package dimensions tssop8, 4.4x3 case 948al ? 01 issue o e1 e a2 a1 e b d c a top view side view end view 1 l1 l notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec mo-153. symbol min nom max a a1 a2 b c d e e1 e l1 0o 8o l 0.05 0.80 0.19 0.09 0.50 2.90 6.30 4.30 0.65 bsc 1.00 ref 1.20 0.15 1.05 0.30 0.20 0.75 3.10 6.50 4.50 0.90 0.60 3.00 6.40 4.40
asm3p622s00b, asm3p622s00e http://onsemi.com 9 package dimensions soic 8, 150 mils case 751bd ? 01 issue o e1 e a a1 h l c e b d pin # 1 identification top view side view end view notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec ms-012. symbol min nom max a a1 b c d e e1 e h 0o 8o 0.10 0.33 0.19 0.25 4.80 5.80 3.80 1.27 bsc 1.75 0.25 0.51 0.25 0.50 5.00 6.20 4.00 l 0.40 1.27 1.35
asm3p622s00b, asm3p622s00e http://onsemi.com 10 package dimensions soic ? 16, 150 mils case 751bg ? 01 issue o top view pin#1 identification e d a e b a1 l h c e1 side view end view notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec ms-012. symbol min nom max a a1 b c d e e1 e h 0o 8o 0.10 0.33 0.19 0.25 9.80 5.80 3.80 1.27 bsc 1.75 0.25 0.51 0.25 0.50 10.00 6.20 4.00 l 0.40 1.27 1.35 9.90 6.00 3.90
asm3p622s00b, asm3p622s00e http://onsemi.com 11 package dimensions tssop16, 4.4x5 case 948an ? 01 issue o pin#1 identification 1 a1 a2 d top view side view end view e e1 b l1 c l a symbol min nom max a a1 a2 b c d e e1 e l1 0o 8o l 0.05 0.85 0.19 0.13 0.45 4.90 6.30 4.30 0.65 bsc 1.00 ref 1.10 0.15 0.95 0.30 0.20 0.75 5.10 6.50 4.50 notes: (1) all dimensions are in millimeters. angles in degrees. (2) complies with jedec mo-153. e
asm3p622s00b, asm3p622s00e http://onsemi.com 12 table 8. ordering information part number marking package type temperature asm3p622s00bf ? 08 ? st 3p622s00bf 8 ? pin 150 ? mil soic ? tube, pb free commercial asm3i622s00bf ? 08 ? st 3i622s00bf 8 ? pin 150 ? mil soic ? tube, pb free industrial asm3p622s00bf ? 08 ? sr 3p622s00bf 8 ? pin 150 ? mil soic ? tape & reel, pb free commercial asm3i622s00bf ? 08 ? sr 3i622s00bf 8 ? pin 150 ? mil soic ? tape & reel, pb free industrial asm3p622s00bf ? 08 ? tt 3p622s00bf 8 ? pin 4.4 ? mm tssop ? tube, pb free commercial asm3i622s00bf ? 08 ? tt 3i622s00bf 8 ? pin 4.4 ? mm tssop ? tube, pb free industrial asm3p622s00bf ? 08 ? tr 3p622s00bf 8 ? pin 4.4 ? mm tssop ? tape & reel, pb free commercial asm3i622s00bf ? 08 ? tr 3i622s00bf 8 ? pin 4.4 ? mm tssop ? tape & reel, pb free industrial asm3p622s00ef ? 16 ? st 3p622s00ef 16 ? pin 150 ? mil soic ? tube, pb free commercial asm3i622s00ef ? 16 ? st 3i622s00ef 16 ? pin 150 ? mil soic ? tube, pb free industrial asm3p622s00ef ? 16 ? sr 3p622s00ef 16 ? pin 150 ? mil soic ? tape & reel, pb free commercial asm3i622s00ef ? 16 ? sr 3i622s00ef 16 ? pin 150 ? mil soic ? tape & reel, pb free industrial asm3p622s00ef ? 16 ? tt 3p622s00ef 16 ? pin 4.4 ? mm tssop ? tube, pb free commercial asm3i622s00ef ? 16 ? tt 3i622s00ef 16 ? pin 4.4 ? mm tssop ? tube, pb free industrial asm3p622s00ef ? 16 ? tr 3p622s00ef 16 ? pin 4.4 ? mm tssop ? tape & reel, pb free commercial asm3i622s00ef ? 16 ? tr 3i622s00ef 16 ? pin 4.4 ? mm tssop ? tape & reel, pb free industrial asm3p622s00bg ? 08 ? st 3p622s00bg 8 ? pin 150 ? mil soic ? tube, pb free commercial asm3i622s00bg ? 08 ? st 3i622s00bg 8 ? pin 150 ? mil soic ? tube, pb free industrial asm3p622s00bg ? 08 ? sr 3p622s00bg 8 ? pin 150 ? mil soic ? tape & reel, pb free commercial asm3i622s00bg ? 08 ? sr 3i622s00bg 8 ? pin 150 ? mil soic ? tape & reel, pb free industrial asm3p622s00bg ? 08 ? tt 3p622s00bg 8 ? pin 4.4 ? mm tssop ? tube, pb free commercial asm3i622s00bg ? 08 ? tt 3i622s00bg 8 ? pin 4.4 ? mm tssop ? tube, pb free industrial asm3p622s00bg ? 08 ? tr 3p622s00bg 8 ? pin 4.4 ? mm tssop ? tape & reel, pb free commercial asm3i622s00bg ? 08 ? tr 3i622s00bg 8 ? pin 4.4 ? mm tssop ? tape & reel, pb free industrial asm3p622s00eg ? 16 ? st 3p622s00eg 16 ? pin 150 ? mil soic ? tube, green commercial asm3i622s00eg ? 16 ? st 3i622s00eg 16 ? pin 150 ? mil soic ? tube, green industrial asm3p622s00eg ? 16 ? sr 3p622s00eg 16 ? pin 150 ? mil soic ? tape & reel, green commercial asm3i622s00eg ? 16 ? sr 3i622s00eg 16 ? pin 150 ? mil soic ? tape & reel, green industrial asm3p622s00eg ? 16 ? tt 3p622s00eg 16 ? pin 4.4 ? mm tssop ? tube, green commercial asm3i622s00eg ? 16 ? tt 3i622s00eg 16 ? pin 4.4 ? mm tssop ? tube, green industrial asm3p622s00eg ? 16 ? tr 3p622s00eg 16 ? pin 4.4 ? mm tssop ? tape & reel, green commercial asm3i622s00eg ? 16 ? tr 3i622s00eg 16 ? pin 4.4 ? mm tssop ? tape & reel, green industrial
asm3p622s00b, asm3p622s00e http://onsemi.com 13 on semiconductor and are registered trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to mak e changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for an y particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different application s and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its of ficers, employees, subsidiaries, af filiates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, direct ly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner. asm3p622s00/d timing safe is a trademark of semiconductor components industries, llc. publication ordering information n. american technical support : 800 ? 282 ? 9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81 ? 3 ? 5773 ? 3850 literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 303 ? 675 ? 2175 or 800 ? 344 ? 3860 toll free usa/canada fax : 303 ? 675 ? 2176 or 800 ? 344 ? 3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your local sales representative

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