1 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 the sy89423v device consists of two identical, low jitter, digital phase locked loops based on micrel-synergy's differential pll technology. each pll is capable of operating in the 30mhz to 560mhz reference input frequency range, and is independent of the other, and is configurable separately. the plls can be configured to be matched in all regards, or can be configured so that pllb is used as a frequency doubler, while plla is used to regenerate the undoubled frequency. each pll is capable of operating up to 2000mhz with the hfin input and an external vco. two reference inputs (rinx and rinx), two feedback inputs (finx and finx), two high frequency inputs (hfinx and hfinx), two filter pins (f1x and f2x), two normal outputs (foutx and foutx), and two high frequency outputs (hfoutx and hfoutx) are provided for each of the two plls. the reference, feedback, and high frequency inputs can be used as either differential or single-ended inputs. external reference voltage generators are required for single-ended drive. feedback for the loops is realized by connecting foutx, foutx to finx, finx by means of external circuitry. this allows the user the flexibility of inserting additional circuitry off-chip in the feedback paths, such as an additional divider. pulldown resistors are required for the foutx and foutx pins, and for the hfoutx and hfoutx pins. use of a phase-frequency detector in each pll results in excellent locking and tracking characteristics. error correction voltages are generated by the detector if either phase or frequency deviations occur. the vco in each pll has a frequency range covering more than a 2:1 ratio from 480mhz to 1120mhz. select pins s1a, s2a, s1b, s2b, and s3b are used to program the n dividers for optimum vco operation, in other words with the vco operating in the center of its range. when both s3b and s5b are low, pllb is identical to plla. when s5b is high, the 2x frequency multiplication option is enabled. select pins s3a and s4b enable the hf inputs for plla and pllb respectively, which allows the use of an external vco in either pll. all the select pins are ttl inputs. features 3.3v and 5v power supply options 1.12ghz maximum vco frequency 30mhz to 560mhz reference input operating frequency external 2.0ghz vco capability frequency doubler mode low jitter differential design pecl differential outputs external loop filter optimizes performance/cost available in 44-pin plcc package description applications workstations advanced communications high-performance computing 5v/3.3v dual high-performance phase locked loop not recommended for new designs pin configuration top view plcc j44-1 654 32 44 1 43 42 41 40 18 19 20 21 22 24 25 26 27 28 23 7 8 9 10 11 12 13 14 15 16 17 n c hfouta hfouta s1a s2a f1a f2a s3a s5b hfina hfina nc hfoutb hfoutb s1b s2b f1b f2b s3b s4b hfinb hfinb 39 38 37 36 35 34 33 32 31 30 29 nc v ccoa fouta fouta v cc v cc nc foutb foutb v ccob nc fina fina rina rina v ee v ee nc rinb rinb finb finb rev.: h amendment: /0 issue date: september 2007 precision edge is a registered trademark of micrel, inc. precision edge sy89423v
2 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 block diagram loop filter component selection c = 1.0 f 10% (x7r dielectric) r = 560 ? 10% r c f1x f2x fouta fouta ?2 rina rina loop filter f1a f2a vco fina fina hfouta hfouta hfina hfina m u x 1 0 s3a foutb foutb ? n b (1, 2, 4, 8, 10, 12, 16, 20) s1b s2b s3b ?2 rin b rin b loop filter f1b f2b vco finb phase-frequency detector finb d hfoutb hfoutb hfinb hfinb m u x 0 1 s4b ?p (1, 2) s5b d d ? n a (2, 4, 8, 16) s1a s2a phase-frequency detector
3 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 pin function i/o f1a filter pin 1a i/o f2a filter pin 2a i/o rina inverted reference input a i rina reference input a i fina feedback input a i fina inverted feedback input a i hfina high frequency input a i hfina inverted high frequency input a i fouta frequency output a o fouta inverted frequency output a o hfouta high frequency output a o hfouta inverted high frequency output a o f1b filter pin 1b i/o f2b filter pin 2b i/o rinb reference input b i rinb inverted reference input b i finb feedback input b i finb inverted feedback input b i hfinb high frequency input b i hfinb inverted high frequency input b i foutb frequency output b o foutb inverted frequency output b o hfoutb high frequency output b o hfoutb inverted frequency output b o v cc v cc v ccoa output v cc v ccob output v cc v ee v ee (0v) s1a select input 1a (ttl) i s2a select input 2a (ttl) i s3a select input 3a (ttl) i s1b select input 1b (ttl) i s2b select input 2b (ttl) i s3b select input 3b (ttl) i s4b select input 4b (ttl) i s5b select input 5b (ttl) i rina, rina, rinb, rinb reference frequency inputs for loop a and b. these are differential signal pairs and may be driven differentially or single-ended. fina, fina, finb, finb feedback frequency inputs for loop a and b. these are differential signal pairs and may be driven differentially or single-ended. hfina, hfina, hfinb, hfinb high frequency feedback inputs. differential drive is recommended. f1a, f2a, f1b, f2b these pins are connection points for the loop filters, which are to be provided off-chip. f1x is the high impedance side, f2x is the reference side. the loop filter should be a first order, low pass with a dc block. the difference voltage on these pins will be a dc level, which is controlled by the loop feedback and determined by the required vco frequency. fouta, fouta, foutb, foutb frequency outputs for the loops. these are differential, positive referenced, emitter-follower signals and must be terminated off-chip. termination in 50 ohms is recommended. hfouta, hfouta, hfoutb, hfoutb high frequency outputs. these are differential, positive referenced, emitter-follower signals and must be terminated off-chip. termination in 50 ohms is recommended. s1a, s2a, s3a, s1b, s2b, s3b, s4b, s5b these inputs are used to select the configuration for plla and pllb. see the frequency selection table for details of the logic. v cc this is the positive supply for the chip. it should be decoupled and present a low impedance in order to assure low-jitter operation. v ccoa , v ccob these are the positive supplies for the output buffers. they are constrained to be equal to or less than the value of v cc . v ee this pin is the negative supply for the chip and is normally connected to ground (0v). pin names pin description
4 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 frequency selection table s3a s2a s1a na fouta (mhz) hfouta (mhz) 0002 240 ?560 480 ?1120 0014 120 ?280 480 ?1120 0108 60 140 480 ?1120 0 1 1 16 30 ?70 480 ?1120 1002 hfina divide by 4 hfina divide by 2 1014 hfina divide by 8 hfina divide by 2 1108 hfina divide by 16 hfina divide by 2 1 1 1 16 hfina divide by 32 hfina divide by 2 plla pllb s4b s3b s2b s1b nb foutb (mhz) hfoutb (mhz) 0 0 0 0 2 240 ?560 480 ?1120 0 0 0 1 4 120 ?280 480 ?1120 0 0 1 0 8 60 ?140 480 ?1120 0 0 1 1 16 30 ?70 480 ?1120 0 1 0 0 1 480 ?1120 480 ?1120 0 1 0 1 10 48 ?112 480 ?1120 0 1 1 0 12 40 ?93.3 480 ?1120 0 1 1 1 20 24 ?56 480 ?1120 1 0 0 0 2 hfinb divide by 4 hfinb divide by 2 1 0 0 1 4 hfinb divide by 8 hfinb divide by 2 1 0 1 0 8 hfinb divide by 16 hfinb divide by 2 1 0 1 1 16 hfinb divide by 32 hfinb divide by 2 1 1 0 0 1 hfinb divide by 2 hfinb divide by 2 1 1 0 1 10 hfinb divide by 20 hfinb divide by 2 1 1 1 0 12 hfinb divide by 24 hfinb divide by 2 1 1 1 1 20 hfinb divide by 40 hfinb divide by 2 maximum feedback s5b divide-by-p frequency (mhz) 0 p = 1 560 1 p = 2 1120
5 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) symbol parameter value unit v cc power supply voltage ?.5 to +7.0 v v i ttl input voltage (2) ?.5 to 6.0 v i i ttl input current (2) ?0 to +5.0 ma i out ecl output current ma ?ontinuous 50 ?urge 100 t store storage temperature ?5 to +150 c t a operating temperature (3) 0 to +85 c notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional oper ation is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum r ating conditions for extended periods may affect device reliability. 2. either voltage limit or current limit is sufficient to protect input. 3. all dc and ac electrical characteristics are specified over the operating temperature range. symbol parameter min. typ. max. unit condition v oh output high voltage v cc ?1.025 v cc ?0.780 v v ol output low voltage v cc ?1.810 v cc ?1.520 v v ih input high voltage v cc ?1.165 v cc ?0.780 v v il input low voltage v cc ?1.810 v cc ?1.475 v pecl dc electrical characteristics v cc = v ccoa = v ccob = 3.3v or 5.0v 5% symbol parameter min. typ. max. unit condition v cc power supply voltage 4.75 5.25 v v cc = v cco i cc power supply current (v cc ) 200 ma i cco power supply current (v cco ) 56 ma pecl outputs are open 5v dc electrical characteristics v cc = v ccoa = v ccob = 5.0v 5% symbol parameter min. typ. max. unit condition v cc power supply voltage 3.135 3.465 v v cc = v cco i cc power supply current (v cc ) 200 ma i cco power supply current (v cco ) 56 ma pecl outputs are open 3.3v dc electrical characteristics v cc = v ccoa = v ccob = 3.3v 5%
6 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 symbol parameter min. typ. max. unit condition v ih input high voltage 2.0 v v il input low voltage 0.8 v i ih input high current 20 av in = 2.7v 100 v in = v cc i il input low current ?.3 ma v in = 0.5v v ik input clamp voltage ?.2 v i in = ?2ma ttl dc electrical characteristics v cc = v ccoa = v ccob = 3.3v or 5.0v 5% symbol parameter min. typ. max. unit condition ? output period jitter 10 15 ps rms p pw output duty cycle 45 50 55 % tr output rise/fall time 300 550 ps tf (20% to 80%) 300 550 rina, b reference frequency inputs 560 mhz fina, b feedback frequency inputs 560 mhz s5b = 0 finb feedback frequency input 1120 mhz s5b = 1 hfina, b high frequency inputs 2000 mhz hfouta, b high frequency outputs 1120 mhz fouta frequency outputs plla 560 mhz foutb frequency outputs pllb 1120 mhz ac electrical characteristics v cc = v ccoa = v ccob = 3.3v or 5.0v 5% ordering package operating code type range sy89423vjc j44-1 commercial sy89423vjctr j44-1 commercial product ordering code
7 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 44-pin plcc (j44-1) rev. 02
8 precision edge sy89423v micrel m9999-091707 hbwhelp@micrel.com or (408) 955-1690 micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 474-1000 web http://www.micrel.com the information furnished by micrel in this datasheet is believed to be accurate and reliable. however, no responsibility is as sumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. micrel products are not designed or authorized for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intend ed for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant inj ury to the user. a purchaser s use or sale of micrel products for use in life support appliances, devices or systems is at purchaser s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2000 micrel, incorporated.
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