p2180 / 81 / 82 / 83 / 84 peak reducing emi solution ?20 10 scillc. all rights re served. publication order number: january 2010 C rev. 2 p2180 /d features fcc approved method of emi attenuation. provides up to 15db emi reduction. generates a 1x low emi spread spectrum clock from the input frequency. optimized for frequency range: o p2180 / 84: 20mhz to 40mhz o p2181: 60mhz to 160mhz o p2182 / 83: 10mhz t o 20mhz internal loop filter minimizes external components and board space. selectable spread options: down spread and center spread. low inherent cycle - to - cycle jitter. eight spread % selections: o 0.625% to - 3.5%. 3.3v operating voltage. cmos/ttl compat ible inputs and outputs. low - power cmos design. supports notebook vga and other lcd timing controller applications. drop - in replacement to cypress w180/1. products are available for industrial temperature range. available in 8 - pin soic and tssop packages. product description the p2180/81x is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies from 20mhz to 40mhz and 60mhz to 160mhz ( refer to input frequency and modulation rate table.) the p2180/81x can generate an emi reduced clock form an osc or a system generated clock. the p2180/81a to p2180/81d offer various combinations of spread options and percentage deviations. ( refer to spread deviation selections table.) these combinations include down and cen ter spread and percentage deviation range from 0.625% to C 3.50%. the p2180/81x reduces electromagnetic interference (emi) at the clock source, allowing system wide reduction of emi of down stream clock and data dependent signals. the p2180/81x allows sig nificant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass emi regulations. the p2180/81x modulates the output of a single pll in order to spread the bandwidth of a synthesized clock , thereby decreasing the peak amplitudes of its harmonics. this results in significantly lower system emi compared to the typical narrow band signal produced by oscillators and most clock generators. lowering emi by increasing a signals bandwidth is calle d spread spectrum clock generation. the p2180/81x uses the most efficient and optimized modulation profile approved by the fcc and is implemented by using a proprietary all - digital method. applications the p2180/81x is targeted towards emi management for m emory and lvds interfaces in mobile graphic chipsets and high - speed digital applications such as pc peripheral devices, consumer electronics, and embedded controller systems.
p2180 / 81 / 82 / 83 / 84 rev. 2 | page 2 of 8 | www.onsemi.com block diagram pin diagram pin description pin# pin name type description 1 xin i connect to externally generated clock signal or crystal. 2 nc no connect. 3 vss p ground to entire chip. 4 srs i spread range select. digital logic input used to select frequency deviation (refer to spread deviation sele ctions table ). this pin has an internal pull - up resistor. 5 modout o spread spectrum low emi output. 6 vdd p connect to +3.3v. 7 nc no connect. 8 nc no connect. 8 1 xout o crystal connection. note: 1. available for p2183 and p2184 only. 1 2 3 4 5 6 7 8 xin vss srs p2180x p2181x p2182x vdd nc modout nc nc xin p2183x p2184x 1 2 3 4 5 6 7 8 vss srs vdd xout modout nc nc xin xout vss frequency divider feedback divider modulation phase detector loop filter vco output divider modout pll vdd srs crystal oscillator
p2180 / 81 / 82 / 83 / 84 rev. 2 | page 3 of 8 | www.onsemi.com input fre quency and modulation rate part number input frequency range (mhz) output frequency range (mhz) modulation rate p2180/p2184 20 to 40 20 to 40 input frequency / 768 p2181 60 to 160 60 to 160 input frequency / 2048 p2182/p2183 10 to 20 10 to 20 tbd spre ad deviation selections part number srs spread deviation p2180/1/2/3/4 a 0 - 1.25% (down) 1 - 1.75% (down) p2180/1/2/3/4 b 0 1.25% (center) 1 1.75% (center) p2180/1/2/3/4 c 0 - 2.50% (down) 1 - 3.50 (down) p2180/1/2/3/4 d 0 0.625%(center) 1 0.8 75% (center) absolute maximum ratings symbol parameter rating unit vdd, v in voltage on any pin with respect to ground - 0.5 to +4.6 v t stg storage temperature - 65 to +125 c t a operating temperature 0 to +70 c t s max. soldering temperature (10 sec) 2 60 c t j junction temperature 150 c t dv static discharge voltage (as per jedec std22 - a114 - b) 2 kv note: these are stress ratings only and are not implied for functional use. exposure to absolute maximum ratings for prolonge d periods of time may affect device reliability.
p2180 / 81 / 82 / 83 / 84 rev. 2 | page 4 of 8 | www.onsemi.com dc electrical characteristics unless otherwise noted, v dd = 3.3v and t a =25c . symbol parameter min typ max unit v il input low voltage gnd C 0.3 - 0.8 v v ih input high voltage - - v dd + 0.3 v i il input low current (inp ut srs) - 60.0 - - 20.0 a i ih input high current - - 1.00 a i xol x out output low current (@ 0.4v, v dd = 3.3v) 2.00 - 12.00 ma i xoh x out output high current (@ 2.5v, v dd = 3.3v) - - 12.00 ma v ol output low voltage (v dd = 3.3v, i ol = 20ma) - - 0.4 v v oh output high voltage (v dd = 3.3v, i oh = 20ma) 2.8 - - v i cc dynamic supply current normal mode (3.3v and 10pf loading) 8.6 f in - min - 27.0 f in - max ma i dd static supply current standby mode - 4.5 - ma v dd operating voltage - 3.3 - v t on power up time (first locked clock cycle after power up) - - - ms z out clock output impedance - - - ac electrical characteristics symbol parameter min typ max unit f in input frequency 10 - 160 mhz f out output frequency 10 - 160 mhz t lh 1 output rise time (measured at 0.8v to 2.0v) - 0.69 - ns t hl 1 output fall time (measured at 2.0v to 0.8v) - 0.66 - ns t jc jitter (cycle - to - cycle) - 200 - 200 ps t d output duty cycle 45 50 55 % note: 1. t lh and t hl are measured into a capacitive load of 15pf .
p2180 / 81 / 82 / 83 / 84 rev. 2 | page 5 of 8 | www.onsemi.com package information 8 - pin soic package symbol dimensions inches millimeters min max min max a1 0.004 0.010 0.10 0.25 a 0.053 0.069 1.35 1.75 a2 0.049 0.059 1.25 1.50 b 0.012 0.020 0.31 0.51 c 0.007 0.010 0.18 0.25 d 0.193 bsc 4.90 bsc e 0.154 bsc 3.91 bsc e 0.050 bsc 1.27 bsc h 0.236 bsc 6.00 bsc l 0.016 0.050 0.41 1.27 0 8 0 8 note: controlling dimensions are millimeters. soic: 0.074 grams unit weight. d e h d a1 a2 a l c b e
p2180 / 81 / 82 / 83 / 84 rev. 2 | page 6 of 8 | www.onsemi.com 8 - pin tssop symbol dimension s inches millimeters min max min max a 0.043 1.10 a1 0.002 0.006 0.05 0.15 a2 0.033 0.037 0.85 0.95 b 0.008 0.012 0.19 0.30 c 0.004 0.008 0.09 0.20 d 0.114 0.122 2.90 3.10 e 0.169 0.177 4.30 4.50 e 0.026 bsc 0.65 bsc h 0.252 bsc 6.40 bsc l 0.020 0.028 0.50 0.70 0 8 0 8 e h a a1 a2 d b c l e
p2180 / 81 / 82 / 83 / 84 rev. 2 | page 7 of 8 | www.onsemi.com ordering information part number marking package type temperature p218xxf - 08 - s t p2181xxf 8 - pin soic, tube, pb free commercial p218xxf - 08 - sr p2181xxf 8 - pin soic, tape and reel , pb free commercial p218xxf - 08 - tt p2181xxf 8 - pin tssop , t ube, pb free commercial p218xxf - 08 - tr p2181xx f 8 - pin tssop , tape and reel , pb free commercial p218xx g - 08 - s t p2181xx g 8 - pin soic, tube, green commercial p 218xxg - 08 - sr p2181xx g 8 - pin soic, tape and reel , green commercial p 218xxg - 08 - tt p2181xx g 8 - pin tsso p , tube, green commercial p 218xxg - 08 - tr p2181xx g 8 - pin tssop , tape and reel , green commercial note: x= 0 / 1 / 2 / 3 / 4 x= a / b / c / d device ordering information p 2 1 8 x x f - 08 st licensed under us patent # 5,488,627 and # 5,631,920 . sr - soic, t/r tt C tssop, tube tr - tssop, t/r s t C soic, tube device number f = lead free and rohs compliant part g = green package, lead free, and rohs p = commercial temperature range (0c to 70c) i = industrial temperature range ( - 4 0c to 85c) deviation (%) and spread option identifier device pin count
p2180 / 81 / 82 / 83 / 84 note: th is product utilizes us patent # 6,646,463 impedance emulator patent issued to pulsecore semiconductor, dated 11 - 11 - 2003 . on semiconductor and are registered trademarks of semiconduct or components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitabili ty of its products for any particular purpose, no r does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaim s any and all liability, including without limitation special, consequential or incidental damages. typical parameters which may including typicals must be publication order ing information 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: or derlit@onsemi.com 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 on semiconductor website: www.onsemi.com order literature: http://www.onsemi.com/orderlit for additional informa tion, please contact your local sales representative
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