november 2005 asm3p2274a rev 0.3 alliance semiconductor 2575 augustine drive ? santa clara, ca ? tel: 408.855.4900 ? fax: 408.855.4999 ? www.alsc.com notice: the information in this document is subject to change without notice. low power 4x multiplier emi reduction ic features ? generates a 4x emi optimized clock signal at the output. ? integrated loop filter components. ? operates with a 3.3 / 2.5v supply. ? low power cmos design. ? input frequency range: 12mhz to 30mhz for 2.5v. : 12mhz to 30mhz for 3.3v. ? frequency deviation: -1.5% (typ) @66mhz output frequency. ? available in 6-pin tsot-23 package. product description the asm3p2274 is a versatile spread spectrum frequency modulator designed specifically for a wide range of clock frequencies. it provides a 4x spread spectrum modulated output from an input clock source. the asm3p2274a reduces electromagnetic interference (emi) at the clock source, allowing system wide reduction of emi of all clock dependent signals. the asm3p2274a allows significant system co st savings by reducing the number of circuit board layers ferrite beads, shielding that are traditionally required to pass emi regulations. the asm3p2274a uses the most efficient and optimized modulation profile approved by the fcc and is implemented by using a proprietary all digital method. the asm3p2274a modulates the output of a single pll in order to ?spread? the bandwidth of a synthesized clock, and more importantly, decreases 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 frequency generators. lowering emi by increasing a signal?s bandwidth is called ?spread spectrum clock generation?. applications the asm3p2274a is targeted towards all portable devices with very low power requirements like mp3 players,mfp, lcd panel module and digital still cameras. key specifications description specification supply voltages vdd = 3.3v / 2.5v cycle-to-cycle jitter 360ps (typ) output duty cycle 45/55% modulation rate equation f in /640 frequency deviation -1.5% (typ) @ 66mhz output block diagram modout vss xin/clkin frequency divide r feedback divide r modulation phase detecto r loop filte r vco output divide r pll vdd pd crystal oscillator xout
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 2 of 8 notice: the information in this document is subject to change without notice. pin configuration (6-pin tsot- 23 package) pin description pin# pin name type description 1 pd i power-down control pin. pull low to enable power-down mode. connect to vdd if not used. 2 xout o crystal connection. if using an external reference, this pin must be left unconnected. 3 xin / clkin i crystal connection or external reference frequency input. this pin has dual functions. it can be connected either to an external crystal or an external reference clock. 4 vdd p power supply for the entire chip. 5 modout o spread spectr um clock output (4x output) 6 vss p ground connection. modulation profile specifications description specification for 2.5v supply 12mhz < clkin < 30mhz input frequency range for 3.3v supply 12mhz < clkin < 30mhz modulation equation f in /640 frequency deviation -1.5% (typ) @ 66mhz output xout 1 2 3 4 5 6 asm3p2274a pd xin / clkin vdd modout vss
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 3 of 8 notice: the information in this document is subject to change without notice. absolute maximum ratings symbol parameter rating unit vdd, v in voltage on any pin with respect to ground -0.5 to +7.0 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. dc electrical characteristics for 2.5v supply (test condition: all parameters are measured at ro om temperature (+25c) unless otherwise stated) symbol parameter min typ max unit v il input low voltage vss - 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 i xol xout output low current (@ 0.5v, vdd=2.5v) ? 3 ? ma i xoh xout output high current (@ 1.8v, vdd=2.5v) ? 3 ? ma v ol output low voltage (vdd = 2.5v, i ol = 8 ma) ? ? 0.6 v v oh output high voltage (vdd = 2.5v, i oh = 8 ma) 1.8 ? ? v i dd static supply current* ? ? 10 ua i cc dynamic supply current (2.5v, 66mhz and no load) ? 3.0 ? ma vdd operating volt age 2.375 2.5 2.625 v t on power-up time (first locked cycle after power-up)** ? ? 5 ms z out output impedance ? 50 ? ? * xin /clkin pin and pd pin are pulled low ** vdd and xin/clkin input are stabl e, pd pin is made high from low. ac electrical characteristics for 2.5v supply symbol parameter min typ max unit clkin input frequency 12 ? 30 mhz modout output frequency 48 ? 120 mhz output frequency = 48mhz ? -1.6 ? f d frequency deviation output frequency = 120mhz ? -1.4 ? % t lh * output rise time (measured from 0.7v to 1.7v) 0.5 2.0 2.3 ns t hl * output fall time (measured from 1.7v to 0.7v) 0.4 1.0 1.2 ns t jc jitter (cycle to cycle) ? 360 ? ps t d output duty cycle 40 50 60 % * t lh and t hl are measured into a capacitive load of 15pf
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 4 of 8 notice: the information in this document is subject to change without notice. dc electrical characteristics for 3.3v supply (test condition: all parameters are measured at room temperature (+ 25c) unless otherwise stated) symbol parameter min typ max unit v il input low voltage vss - 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 i xol xout output low current (@ 0.4v, vdd=3.3v) ? 3 ? ma i xoh xout output high current (@ 2.5v, vdd=3.3v) ? 3 ? ma v ol output low voltage (vdd = 3.3v, i ol = 8 ma) ? ? 0.4 v v oh output high voltage (vdd = 3.3v, i oh = 8 ma) 2.5 ? ? v i dd static supply current* ? ? 10 ua i cc dynamic supply current (3.3v, 66mhz and no load) ? 4.0 ? ma vdd operating volt age 3.0 3.3 3.6 v t on power-up time (first locked cycle after power-up)** ? ? 5 ms z out output impedance ? 45 ? ? * xin /clkin pin and pd pin are pulled low ** vdd and xin/clkin input are stabl e, pd pin is made high from low. ac electrical characteristics for 3.3v supply symbol parameter min typ max unit clkin input frequency 12 ? 30 mhz modout output frequency 48 ? 120 mhz output frequency = 48mhz ? -1.6 ? f d frequency deviation output frequency = 120mhz ? -1.4 ? % t lh * output rise time (measured fr om 0.8 to 2.0v) 0.4 1.3 1.6 ns t hl * output fall time (measured at 2.0v to 0.8v) 0.4 0.8 1.1 ns t jc jitter (cycle to cycle) ? 360 ? ps t d output duty cycle 40 50 60 % *t lh and t hl are measured into a capacitive load of 15pf
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 5 of 8 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 14.31818 mhz 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 = 27 pf c2 = 27 pf crystal 200k ?
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 6 of 8 notice: the information in this document is subject to change without notice. package information 6-pin tsot-23 package dimensions inches millimeters symbol min max min max a 0.04 1.00 a1 0.00 0.004 0.00 0.10 a2 0.033 0.036 0.84 0.90 b 0.012 0.02 0.30 0.50 h 0.005 bsc 0.127 bsc d 0.114 bsc 2.90 bsc b 0.06 bsc 1.60 bsc e 0.0374 bsc 0.950 bsc c 0.11 bsc 2.80 bsc l 0.0118 0.02 0.30 0.50 0 4 0 4
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 7 of 8 notice: the information in this document is subject to change without notice. ordering information part number marking package type temperature asm3p2274af-06-or z4 6-pin tsot-23, tape & reel, pb free commercial asm3p2274a-06-or z1 6-pin tsot-23, tape & reel commercial ASM3P2274AG-06-OR z3 6-pin tsot-23, tape & reel, green commercial asm3i2274af-06-or z5 6-pin tsot-23, tape & reel, pb free industrial asm3i2274a-06-or z2 6-pin tsot-23, tape & reel industrial asm3i2274ag-06-or z6 6-pin tsot- 23, tape & reel, green industrial device ordering information asm3p2274af-06-0r licensed under u.s patent nos 5,488,627 and 5,631,921 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 = q fn 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 = s td z e r o d e l ay b u ff er 0 = r ese rv ed alliance semiconductor mixed signal product part number f = lead free and rohs compliant part g = green package r = tape & reel, t = tube or tray
november 2005 asm3p2274a rev 0.3 low power 4x multiplier emi reduction ic 8 of 8 notice: the information in this document is subject to change without notice. note: this product utilizes us patent # 6,646,463 impedance em ulator patent issued to alliance semiconductor, dated 11-11-2003 ? copyright 2003 alliance semiconductor corporation. all right s reserved. our three-point logo, our name and intelliwatt are trademarks or registered trademarks of alli ance. all other brand and product names ma y be the trademarks of their respective companies. alliance reserves the right to make changes to this document and its products at an y time without notice. alliance assumes no responsibility for any errors that may appear in this document. the data containe d herein represents alliance's best data and/or estimates at the time of issuance. alliance re serves the right to change or correct this data at any time, without notice. if the product described herein is under developm ent, significant changes to thes e 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 intended to operate as, or provid e, any guarantee or warrantee to any user or customer. alliance does not assume any responsibility or liability arising out of the application or use of any product described herein, and disclaims any expres s or implied warranties related to the sale and/or use of alliance products including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellec tual property rights, except as express agreed to in allian ce's terms and conditions of sale (which are available from a lliance). all sales of alliance products are made exclusively according to alliance's terms and conditions of sale. the purchase of products from alliance does not convey a license under any patent rights, copyrights; mask works rights, trademarks, or any other intellectual property rights of alliance or third parties. alliance does not authorize its products for use as cr itical components in life-suppor ting systems where a malfunction or failure may reasonably be expected to result in significant injury to the user, and the incl usion of alliance products in su ch life-supporting systems implies that the manufacturer assumes all risk of such us e and agrees to indemnify alliance against all claims arising from such use. alliance semiconductor corporation 2575 augustine drive, santa clara, ca 95054 tel# 408-855-4900 fax: 408-855-4999 www.alsc.com copyright ? alliance semiconductor all rights reserved preliminary information part number: asm3p2274a document version: v0.3
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