p1727 low power notebook lcd panel emi reduction ic ?20 10 scillc. all rights reserved. publication order number: january 2010 C rev. 1 p1727 /d features fcc approved method of emi attenuation generates a low emi spread spectrum of the input clock frequency optimized for frequency range: p1727x: 20mhz to 40mhz internal loop filter minimizes external components and board space 8 different frequency deviations ranging from +/ - 0.625% to C 3.50% low inherent cycle - to - cycle jitter 3.3v operating v oltage supports notebook vga and other lcd timing controller applications available in 8 pin soic and tssop qualified for industrial temp spec. ( - 40c to +85c) product description the p1727 is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. the p1727 reduces electromagnetic interference (emi) at the clock source, allowing system wide r eduction of emi of down stream (clock and data dependent signals). the p1727 allows significant system cost savings by reducing the number of circuit board layers and shielding that are traditionally required to pass emi regulations. the p1727 modulates th e output of a single pll in order to spread the bandwidth of a synthesized clock, thereby decreasing the peak amplitudes of its harmonics. this result in significantly lower system emi compared to the typical narrow band signal produced by oscillators an d most clock generators. lowering emi by increasing a signals bandwidth is called spread spectrum clock generation. the p1727 uses the most efficient and optimized modulation profile approved by the fcc and is implemented by using a proprietary all - digita l method. applications the p1727 is targeted towards notebook lcd displays, other displays using an lvds interface, pc peripheral devices and embedded systems. block diagram clkin v ss loop filter modulation v dd frequency divider feedback divide r phase detector vco pll pd b output divider refout modout
p1727 rev. 1 | page 2 of 9 | www.onsemi.com pin configuration t able 1 C power down selection pdb spread spectrum modout pll mode 0 n/a disabled disabled power down 1 on normal normal normal table 2 C frequency deviation selection p/ n deviation p/n deviation p1727a - 1.25% p1727e +/ - 0.625% p1727b - 1.75% p1727f + / - 0.875% p1727c - 2.50% p1727g +/ - 1.25% p1727d - 3.50% p1727h +/ - 1.75% pin description pin# pin name type description 1 clkin i external reference frequency input. connect to externally generated reference signal. 2 v dd p connect to +3.3v . 3 vss p gro und connection. connect to system ground. 4 modout o spread spectrum clock output . 5 refout o reference output. 6 nc no connect . 7 nc no connect . 8 pdb i powerdown pin. pull low to disable spread spectrum clock output. nc refout 1 2 3 4 5 6 7 8 p1727 clkin vdd vss modout nc pdb
p1727 rev. 1 | page 3 of 9 | www.onsemi.com p1727 clkin vdd nc refou t vss modout nc 1 2 3 4 5 6 7 8 pd b 0.1 f tie low to enable powerdown mode. 27mhz pixel clock input schematic for notebook vg a application absolute maximum ratings symbol parameter rating unit vdd , v in voltage on any pin with respect to ground - 0.5 to + 7 v t stg storage temperature - 65 to +125 c t s max. soldering te mperature (10 sec) 260 c t j junction temperature 150 c t dv static discharge voltag e (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 period s of time may affect device reliability. vdd modout clock output reference c lock o/p
p1727 rev. 1 | page 4 of 9 | www.onsemi.com dc electrical characteristics symbol parameter min typ max unit v il input low voltage vss C 0.3 0.8 v v ih input high voltage 2.0 vdd +0.3 v i il input low current - 35 a i ih input high current 35 a v ol output low current vdd = 3.3v, i ol = 20ma 0.4 v v oh output high current vdd = 3.3v, i oh = 20ma 2.5 v i dd static supply current (clkin, pdb pulled low) 2 ma i cc dynamic supply current ( no load ) 14 18 ma v dd operating voltage 3.0 3. 3 3.6 v t on power up time (first locked clock cycle after power up) 0.18 ms z out clock output impedance 50 ? t a operating temperature 0 70 c ac electrical characteristics symbol parameter min typ max unit f in input frequency: p1727x 20 40 mhz f out output frequency : p1727x 20 40 mhz t lh 1 output rise time measured from 0.8v to 2.0v 0.7 0.9 1.1 ns t hl 1 output fall time measured from 2.0v to 0.8v 0.6 0.8 1.0 ns t jc jitter (c ycle - to - cycle) 225 325 ps t d output duty cycle 45 50 55 % note: 1. t lh and t hl are measured with a capacitive load of 15pf .
p1727 rev. 1 | page 5 of 9 | www.onsemi.com package information 8 - lead (150 - mil) 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 0.01 0 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 d e h d a1 a2 a l c b e
p1727 rev. 1 | page 6 of 9 | www.onsemi.com 8 - lead thin shrunk small outline package (4.40 - mm body) symbol dimensions i nches m illimeters 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
p1727 rev. 1 | page 7 of 9 | www.onsemi.com ordering information part number marking package config uration temperature range p1727a g - 08st p1727a g 8 pin soic, tube , green commercial p1727a g - 08sr p1727a g 8 pin soic, tape & reel , green commercial p1727a g - 08tt p1727a g 8 pin tssop, tube , green commercial p1727a g - 08tr p1727a g 8 pin tssop, tape & reel , gre en commercial p1727 bg - 08st p1727 bg 8 pin soic, tube , green commercial p1727 bg - 08sr p1727 bg 8 pin soic, tape & reel , green commercial p1727 bg - 08tt p1727 bg 8 pin tssop, tube , green commercial p1727 bg - 08tr p1727 bg 8 pin tssop, tape & reel , green commercia l p1727 cg - 08st p1727 cg 8 pin soic, tube , green commercial p1727 cg - 08sr p1727 cg 8 pin soic, tape & reel , green commercial p1727 cg - 08tt p1727 cg 8 pin tssop, tube , green commercial p1727 cg - 08tr p1727 cg 8 pin tssop, tape & reel , green commercial p1727 dg - 0 8st p1727 dg 8 pin soic, tube , green commercial p1727 dg - 08sr p1727 dg 8 pin soic, tape & reel , green commercial p1727 dg - 08tt p1727 dg 8 pin tssop, tube , green commercial p1727 dg - 08tr p1727 dg 8 pin tssop, tape & reel , green commercial p1727e g - 08st p1727e g 8 pin soic, tube , green commercial p1727e g - 08sr p1727e g 8 pin soic, tape & reel , green commercial p1727e g - 08tt p1727e g 8 pin tssop, tube , green commercial p1727e g - 08tr p1727e g 8 pin tssop, tape & reel , green commercial p1727f g - 08st p1727f g 8 pin soic, tube , green commercial p1727f g - 08sr p1727f g 8 pin soic, tape & reel , green commercial p1727f g - 08tt p1727f g 8 pin tssop, tube , green commercial p1727f g - 08tr p1727f g 8 pin tssop, tape & reel , green commercial p1727g g - 08st p1727g g 8 pin soic, tube , green commercial p1727g g - 08sr p1727g g 8 pin soic, tape & reel , green commercial p1727g g - 08tt p1727g g 8 pin tssop, tube , green commercial p1727g g - 08tr p1727g g 8 pin tssop, tape & reel , green commercial p1727h g - 08st p1727h g 8 pin soic, tube , green commercial p1727h g - 08sr p1727h g 8 pin soic, tape & reel , green commercial p1727h g - 08tt p1727h g 8 pin tssop, tube , green commercial p1727h g - 08tr p1727h g 8 pin tssop, tape & ree l, green commercial
p1727 rev. 1 | page 8 of 9 | www.onsemi.com device ordering information p 1 7 2 7 x g 0 8 - xx licensed under us patent #5,488,627, #6,646,463 and #5,631,920. sr - soic, t/r tt C C flow: p = commercial temperature range (0c to 70c) i = industrial temperature range ( - 40c to 85c) pin count deviatio n (%) and spread option identifier f = lead free and rohs compliant part g = green package, lead free, and rohs
p1727 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 re gistered trademarks of semiconductor 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 produ cts for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifical ly disclaims any and all liability, including without limitation special, consequential or incidental damage s. typical parameters which may be provided in scillc data sheets and/or including typicals must be publication ordering 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 - 3 867 toll free usa/canada email: orderlit@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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