february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. pulsecore semiconductor corporation 1715 s. bascom ave suite 200, campbell, ca 95008 ? tel: 408-879-9077 ? fax: 408-879-9018 www. p ulsecoresemi.com peak emi reducing solution features ? generates an emi optimized clock at the output. ? input frequency: 25mhz. ? frequency outputs: ? 60mhz (unmodulated) ? 2 x 48mhz (unmodulated) ? 66.6mhz (modulated): -1.7% down spread ? modulation rate: 30khz. ? supply voltage range: 3.3v 0.3v. ? available in 8-pin soic package. ? commercial and industrial temperature range. ? rohs compliant product description the asm3p2111b is a versatile spread spectrum frequency modulator that reduces electromagnetic interference (emi) at the clock source. the asm3p2111b allows significant system co st savings by reducing the number of circuit board layers and shielding that are required to pass emi regulations. the asm3p2111b modulates the output of 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 signal?s bandwidth is called spread spectrum clock generation. applications asm3p2111b is targeted towards emi management for high speed digital applications such as pc peripheral devices, consumer electronics and embedded controller systems. block diagram crystal oscillator 66.6 mhz modulated xin /clkin xout v ss 48 mhz_2 60 mhz 48 mhz_1 pll1 pll2 48 mhz_1 v dd
peak reducing emi solution 2 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. pin configuration pin description pin # pin name type description 1 xin / clkin i connection to crystal 2 xout o connection to crystal 3 v dd p power supply for the analog and digital blocks (+3.3v) 4 60mhz o clock output-1 60mhz un-modulated 5 48mhz_2 o clock output-2 48mhz_2 un-modulated 6 48mhz_1 o clock output-3 48mhz_1 un-modulated 7 66.6mhz o clock output-4 66.6mhz modulated 8 v ss p ground to entire chip. connect to system ground 60mhz v ss xout xin/ clkin v dd 8 7 6 5 1 2 3 4 a sm3p2111b 48mhz_2 48mhz_1 66.6mhz
peak reducing emi solution 3 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. absolute maximum ratings symbol parameter rating unit v dd , 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 -40 to +85 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 note: these are stress ratings only and are not implied for functional use. exposure to absolute maximum ratings for prolonged periods of time may affect device reliability. operating conditions symbol parameter condition / description min typ max unit v dd supply voltage 3.3v 0.3v 3 3.3 3.6 v f xin crystal resonator frequency 25 - - mhz c l output driver load capacitance - - 15 pf
peak reducing emi solution 4 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. dc electrical characteristics ac electrical characteristics parameter symbol conditions/ description min typ max unit rise time t r v o = 0.8v to 2.0v; c l = 15pf 300 800 900 ps fall time t f v o = 2.0v to 0.8v; c l = 15pf 360 800 900 ps clock duty cycle ratio of pulse width (as measured from rising edge to next falling edge at v dd /2) to one clock period 45 - 55 % * c l = 15 p f, in p ut clock fre q uenc y = 25mhz parameter symbol conditions / description min typ max unit overall supply current, dynamic i dd v dd =3.3v, f clk =25mhz, c l =15pf 41 48 62 ma supply current, static i ddl v dd = 3.3v, clock input = 0 20 25 35 ma all input pins high-level input voltage v ih v dd =3.3v 2.0 - v dd +0.3 v low-level input voltage v il v dd =3.3v v ss -0.3 - 0.8 v high-level input current i ih -1 - 1 clock outputs high-level output source current i oh v o =2.5v - -20 - ma low-level output sink current i ol v o =0.4v - 23 - ma z oh v o =0.5 v dd ; output driving high - 29 - output impedance z ol vo=0.5 v dd ; output driving low - 27 - ?
peak reducing emi solution 5 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. typical crystal oscillator circuit typical crystal specifications fundamental at cut parallel resonant crystal nominal frequency 25mhz frequency tolerance 50 ppm or better at 25c operating temperature range -25c to +85c storage temperature -40c to +85c load capacitance 18pf shunt capacitance 7pf maximum esr 25 ? r1 = 510 ? c1 =18 pf c2 = 18 pf crystal
peak reducing emi solution 6 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. package information 8-lead (150-mil) soic package d e h d a1 a2 a l c b e dimensions inches millimeters symbol 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
peak reducing emi solution 7 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. ordering codes part number marking package configuration temperature range asm3p2111bf-08st 3p2111bf 8-pin soic tube, pb free commercial asm3p2111bf-08sr 3p2111bf 8-pin soic tape & reel, pb free commercial asm3i2111bf-08st 3i2111bf 8-pin soic tube, pb free industrial ASM3I2111BF-08SR 3i2111bf 8-pin soic tape & reel, pb free industrial asm3p2111bg-08st 3p2111bg 8-pin soic tube, green commercial asm3p2111bg-08sr 3p2111bg 8-pin soic tape & reel, green commercial asm3i2111bg-08st 3i2111bg 8-pin soic tube, green industrial asm3i2111bg-08sr 3i2111bg 8-pin soic tape & reel, green industrial ordering information asm3p2111bf-08 sr licensed under us patent #5,488 ,627, #6,646,463 a nd #5,631,920. o = sot u = msop s = soic e = tqfp t = tssop l = lqfp a = ssop u = msop v = tvsop p = pdip b = bga d = qsop q = qfn x = sc - 70 device pin count x= automotive i= industrial p or n/c = commercial (-40c to +125c) (-40c to +85c) (0c to +70c) 1 = reserved 6 = power management 2 = non pll based 7 = power management 3 = emi reduction 8 = power management 4 = ddr support products 9 = hi performance 5 = std zero dela y buffe r 0 = reserved pulsecore semiconductor mixed signal product part number f = lead free and rohs compliant part g = green package, lead free, and rohs r = tape & reel, t = tube or tray
peak reducing emi solution 8 of 8 february 2007 asm3p2111b rev 0.2 notice: the information in this document is subject to change without notice. pulsecore semiconductor corporation 1715 s. bascom ave suite 200 campbell, ca 95008 tel: 408-879-9077 fax: 408-879-9018 www.pulsecoresemi.com ? copyright 2007 pulsecore semiconductor corporation. all rights reserved. our logo and name are trademarks or registered trademarks of pulsecore semiconductor. all ot her brand and product names may be the trademarks of their respective companies. pulsecore reserves the right to make changes to this document and its products at any time without notice. pulsecore assumes no responsibility for any errors t hat may appear in this document. the data contained herein represents pulsecore?s best data and/or estimates at the time of issuance. pulsecore reserves the right to change or correct this data at any time, without notice. if the product descri bed herein is under development, significant changes to these specifications are possible. the information in this product data sheet is intended to be general descriptive information for potential customers and users, and is not in tended to operate as, or provide, any guarantee or warrantee to any user or customer. pulsecore does not assume any responsibility or liability arising out of the app lication or use of any product described herein, and disclaims any express or implied warrant ies related to the sale and/or use of pulsecore products including liability or warranties related to fitness for a particular purpose, mercha ntability, or infringement of any intellec tual property rights, except as express agreed to in pulsecore? s terms and conditions of sale (which are available from pulsecore). all sales of pulsecore products are made exclusiv ely according to pulsecore?s terms and conditions of sale. the purchase of products from pulsecore does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellect ual property rights of pulsecore or third partie s. pulsecore does not authorize its products for use as critical components in life-supp orting systems where a malfunction or failu re may reasonably be expected to result in significant injury to the user, and the inclusion of pulsec ore products in such life-supporting systems implies that the manufacturer assumes all risk of such use and agrees to inde mnify pulsecore against all claims arising from such use. copyright ? pulsecore semiconductor all rights reserved part number: asm3p2111b document version: v0.2 note: this product utilizes us patent # 6,646,463 impedance emulator patent issued to pulsecore semiconductor, dated 11-11-2003
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