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datasheet clock synchronizer and multiplier idt9170b idt? clock synchronizer and multiplier 1 idt9170b rev b 052609 description the idt9170b generates an output clock which is synchronized to a given continuous input clock with zero delay (1ns at 5 v vdd). using idt?s proprietary phase-locked loop (pll) analog cmos technology, the idt9170b is useful for regenerating clocks in high speed systems where skew is a major concern. by the use of the two select pins, multiples or divisions of the input clock can be generated with zero delay (see tables 2 and 3). the standard versions produce two outputs, where clk2 is always a divide by two version of clk1. the idt9170b is also useful to recover poor duty cycle clocks. a 50 mhz signal with a 20/80% duty cycle, for example, can be regenerated to the 48/52% typical of the part. the idt9170b allows the user to control the pll feedback, making it possible, with an additional 74f240 octal buffer (or other such device that offers controlled skew outputs), to synchronize up to 8 output clocks with zero delay compared to the input (see figure 1). application notes for the idt9170b are available. please consult idt. features ? on-chip phase-locked loop for clocks synchronization. ? synchronizes frequencies up to 107 mhz (output) @ 5.0 v ? 1ns skew (max) between input & output clocks @ 5.0 v ? can recover poor duty cycle clocks ? clk1 to clk2 skew controlled to within 1ns @ 5.0 v ? 3.0 - 5.5 v supply range ? low power cmos technology ? small 8-pin dip or soic package ? on chip loop filter ? idt9170b-01 for output clocks 20-107 mhz @ 5.0 v, 20 - 66.7 mhz @ 3.3 v ? idt9170b-02 for output clocks 5-26.75 mhz @ 5.0 v, 5 - 16.7 mhz @ 3.3 v block diagram
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 2 idt9170b rev b 052609 pin assignment pin descriptions using the idt9170b the idt9170b has the following characteristics: 1. rising edges at in and fbin are lined up. falling edges are not synchronized. 2. the relationship between the frequencies at fbin and in with clk1 feedback is shown in table 1 below . functionality (table 1) 3. the frequency of clk2 is half the clk1 frequency. 4. the clk1 frequency ranges are: eliminate high speed clock routing problems the idt9170b makes it possible to route lower speed clocks over long distances on the pc board and to place an idt9170b next to the device requiring a higher speed clock. the multiplied output can then be used to produce a phase locked, higher speed output clock. compensate for propagation delays including an idt9170b in a timing loop allows the use of pals, gate arrays, etc., with loose timing specifications. the idt9170b compensates for the delay through the pal and synchronizes the output to the input reference clock. fbin in gnd vdd fs0 clk1 fs1 clk2 1 2 3 4 8 7 6 5 pin number pin name pin type pin description 1 fbin input feedback input. 2 in input input for reference clock. 3 gnd power connect to ground. 4 fs0 input frequency select 0. 5 fs1 input frequency select 1. 6 clk1 output clock output 1. see tables 1, 2 for values. 7 vdd power power supply. 8 clk2 output clock output 2. see tables 1, 2 for values. fs1 fs0 f fbin (-01, -02) 0 0 2 * f in 01 4 * f in 10 f in 11 8 * f in vdd=5 v vdd=3.3 v idt9170b-01 20 < f clk1 <107 mhz <66.7 idt9170b-02 5 < f clk1 <26.75 mhz <16.7
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 3 idt9170b rev b 052609 operating frequency range the idt9170b is offered in versions optimized for operation in two frequency ranges. the -01 covers high frequencies, 20 to 100 mhz.* the -02 operates from 5 to 25 mhz.* the idt9170b can be supplied with custom multiplication factors and operating ranges. consult idt for details. 3.3 v vdd operation the idt9170b does operate at both 5.0 v and 3.3 v system conditions. please note the electrical characteristic specifications at 3.3 v include a limited output frequency (66.6 mhz max.) and a wider skew of fbin to clk1. for 3.3 v5% (3.15 v min.), this skew is -5.0 to 0 ns. at 3.3 v10% (3.0 v min.), the skew is widened to -8 ns to 0 ns and should be accounted for in system design. *at 3.3 v, the maximum clk1 frequency is 66.7 mhz for - 01 4 and 16.7 mhz for -02. figure 1: application of multiple outputs
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 4 idt9170b rev b 052609 using clk2 feedback connecting clk2 to fbin as shown in figure 2 will cause all of the rising edges to be aligned (figure 4). figure 2 for clk2 frequencies 10 - 53.5 mhz* (-01) for clk2 frequencies 2.5 - 13.37 mhz (-02) *maximum 33.3 mhz@3.3 v (-01), 8.33 mhz@3.3 v (-02) table 2 functionality table for idt9170b -01, -02 with clk2 feedback figure 4 input and output clock waveforms with clk2 connected to fbin using clk1 feedback with clk1 connected to fbin as shown in figure 3, the input and clk1 output will be a ligned on the rising edge, but clk2 can be either rising or fa lling (figure 5). consult idt if the clk1 frequency is desired to be higher than 107 mhz. figure 3 for clk1 frequencies 20 - 107 mhz? (-01) for clk1 frequencies 5 - 26.75 mhz (-02) ?maximum 66.7 mhz@3.3 v (-01), 16.7 mhz@3.3 v (-02) table 3 functionality table for idt9170b -01, -02 with clk2 feedback figure 5 input and output clock waveforms with clk1 connected to fbin fs1 fs0 clk1 clk2 0 0 inx4 inx2 0 1 inx8 inx4 1 0 inx2 in 1 1 inx16 inx8 fs1 fs0 clk1 clk2 0 0 inx2 in 0 1 inx4 inx2 1 0 in in/2 1 1 inx8 inx4
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 5 idt9170b rev b 052609 absolute maximum ratings stresses above the ratings listed below can cause permanent damage to the idt9170b. these ratings, which are standard values for idt commercially rated parts, are stress ratings only. functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for exte nded periods can affect product reliability. electrical parameters are guaranteed only over the recommended operating temperature range. dc electrical characteristics at 5 v unless stated otherwise, vdd = 5 v 5% , ambient temperature 0 to +70 c *parameter guaranteed by design and characterization. not 100% tested in production. parameter condition min. typ. max. units supply voltage, vdd referenced to gnd 7 v ambient operating temperature under bias 0 +70 c voltage i/o pins referenced to gnd -0.5 vdd+0.5 v storage temperature -65 150 c soldering temperature 260 c power dissipation 0.5 w parameter symbol conditions min. typ. max. units operating supply current idd1 no load, 107 mhz (-01) 30 50 ma operating supply current idd2 no load, 26.5 mhz (-02) 13 20 ma input high voltage v ih vdd=5 v 2.0 v input low voltage v il vdd=5 v 0.8 v input high current i ih vin=vdd 5 a input low current i il vin=0 v -1.5 -5 a output high voltage* v oh1 i oh = -1 ma vdd-0.4 v v oh2 i oh = -4 ma vdd-0.8 v v oh3 i oh = -8 ma 2.4 v output low voltage* v ol i ol = 8 ma 0.4 v
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 6 idt9170b rev b 052609 ac electrical characteristics at 5 v unless stated otherwise, vdd = 5 v 5% , ambient temperature 0 to +70 c parameters guaranteed by design and characterization. not 100% tested in production. note 1: it may be possible to operate the idt9170b ou tside of these ranges. consult idt for your specific application. note 2: all ac specifications are measured with a 50 ? transmission line, load teminated with 50 ? to 1.4 v. note 3: duty cycle measured at 1.4 v. note 4: skew measured at 1.4 v on rising edges. positive sign indicates the first signal precedes the second signal. parameter symbol conditions min. typ. max. units input frequency f i1 note 1, idt9170b-01 2.5 107 mhz f i2 idt9170b-02 2 26.75 mhz output frequency, clk1 f o1 idt9170b-01 20 107 mhz f o2 idt9170b-02 5 26.75 mhz input clock rise time iclkr 10 ns input clock fall time iclkf 10 ns output rise time t r1 0.8 to 2.0 v, 15 pf load 0.6 2 ns rise time t r2 20% to 80% vdd, 15 pf load 1.2 3 ns output fall time t f1 2.0 to 0.8 v, 15 pf load 0.4 2 ns fall time t f2 80% to 20% vdd, 15 pf load 0.9 2 ns output duty cycle, idt9170b-01 d t1 15 pf load, note 2, 3 40 48-52 60 % output duty cycle, idt9170b-02 d t2 15 pf load, note 2, 3 45 49-51 55 % one sigma jitter 125 300 ps absolute jitter t abs1 clk1>20 mhz (-01) -500 500 ps clk1>5 mhz (-02) fbin to in skew t skew1 15 pf load, input rise time <5 ns, note 2, 4 -1 -0.3 1 ns t skew2 15 pf load, input rise time <10 ns, note 2, 4 -2 -0.3 2 ns clk1 to clk2 skew t skew3 note 2, 4 -1 0.4 1 ns
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 7 idt9170b rev b 052609 dc electrical characteristics at 3.3 v unless stated otherwise, vdd = 3.3 v 5% , ambient temperature 0 to +70 c parameters guaranteed by design and characterization. not 100% tested in production. parameter symbol conditions min. typ. max. units operating supply current idd1 no load, 66.7 mhz (-01) 17 30 ma operating supply current idd2 no load, 16.7 mhz (-02) 7 15 ma input high voltage v ih vdd=3.3 v 0.7vdd v input low voltage v il vdd=3.3 v 0.2vdd v input high current i ih vin=vdd 5 a input low current i il vin=0 v -7 -4 a output high voltage* v oh1 i oh = -1 ma vdd-0.4 v v oh2 i oh = -3 ma vdd-0.8 v v oh3 i oh = -6 ma 2.4 v output low voltage* v ol i ol = 6 ma 0.4 v
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 8 idt9170b rev b 052609 ac electrical characteristics at 3.3 v unless stated otherwise, vdd = 3.3 v 5% , ambient temperature 0 to +70 c parameters guaranteed by design and characterization. not 100% tested in production. note 1: it may be possible to operate the idt9170b ou tside of these ranges. consult idt for your specific application. note 2: all ac specifications are measured with a 50 ? transmission line, load teminated with 50 ? to 1.4 v. note 3: duty cycle measured at 1.4 v. note 4: skew measured at 1.4 v on rising edges. positive sign indicates the first signal precedes the second signal. parameter symbol conditions min. typ. max. units input frequency f i1 idt9170b-01 7 66.7 mhz f i2 idt9170b-02 2 16.7 mhz output frequency, clk1 f o1 idt9170b-01 20 66.7 mhz f o2 idt9170b-02 5 16.7 mhz input clock rise time iclkr 10 ns input clock fall time iclkf 10 ns output rise time t r1 0.8 to 2.0 v, 15 pf load 1.1 2 ns rise time t r2 20% to 80% vdd, 15 pf load 1.8 4 ns output fall time t f1 2.0 to 0.8 v, 15 pf load 0.8 2 ns fall time t f2 80% to 20% vdd, 15 pf load 1.2 3 ns output duty cycle, idt9170b-01 d t1 15 pf load, note 2, 3 40 52 60 % output duty cycle, idt9170b-02 d t2 15 pf load, note 2, 3 45 51 55 % one sigma jitter 150 300 ps absolute jitter t abs1 clk1>10 mhz (-01) -500 500 ps clk1>2.5 mhz (-02) t abs2 clk1<10 mhz (-01) -2 2 % clk1<2.5 mhz (-02) fbin to in skew t skew1 15 pf load 3.0< vdd< 3.7, note 2, 4 -4.0 -1.0 1.5 ns t skew2 15 pf load 3.0< vdd< 3.7, note 2, 4 -3.0 -1.0 1.5 ns clk1 to clk2 skew t skew3 note 2, 4, 15 pf load -2.0 -0.9 0 ns
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 9 idt9170b rev b 052609 general layout precautions 1) use a ground plane on the top layer of the pcb in all areas not used by traces. 2) make all power traces and vias as wide as possible to lower inductance. note: all clock outputs should have se ries terminating resistor. not shown in all places to improve readibility of diagram. connections to vdd thermal characteristics parameter symbol conditions min. typ. max. units thermal resistance junction to ambient ja still air 150 c/w ja 1 m/s air flow 140 c/w ja 3 m/s air flow 120 c/w thermal resistance junction to case jc 40 c/w thermal resistance junction to top of case jt still air 20 c/w
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 10 idt9170b rev b 052609 package outline and package dimensions (8-pin soic, 150 mil. body) package dimensions are kept current with jedec publication no. 95 ordering information parts ordered with a "lf" suffix to the part number are the pb-free configurat ion and are rohs compliant. while the information presented herein has been checked for both accuracy and reliability, integrated device technology (idt) a ssumes no responsibility for either its use or for the infringement of any paten ts or other rights of third parties, which would resul t from its use. no other circuits, patents, or licenses are im plied. this product is intended for use in normal commercial applications. any other applications such as those requiring extended temperature range, high reliab ility, or other extraordinary environmental requirements are not recommended without additional processing by idt. idt reserves th e right to change any circuitry or specifications without noti ce. idt does not authorize or warrant any idt product for use in life support devices or critical medical instruments. part / order number marking shipping packaging package temperature 9170b-01cs08lf tbd tubes 8-pin soic 0 to +70 c 9170b-01cs08lft tape and reel 8-pin soic 0 to +70 c 9170b-02cs08lf tubes 8-pin soic 0 to +70 c 9170B-02CS08LFT tape and reel 8-pin soic 0 to +70 c index area 1 2 8 d e seating plane a1 a e - c - b .10 (.004) c c l h h x 45 millimeters inches symbol min max min max a 1.35 1.75 .0532 .0688 a1 0.10 0.25 .0040 .0098 b 0.330.51.013.020 c 0.19 0.25 .0075 .0098 d 4.80 5.00 .1890 .1968 e 3.80 4.00 .1497 .1574 e 1.27 basic 0.050 basic h 5.80 6.20 .2284 .2440 h 0.250.50.010.020 l 0.401.27.016.050 0 8 0 8
idt9170b clock synchronizer and multip lier clock synthesizer idt? clock synchronizer and multiplier 11 idt9170b rev b 052609 revision history rev. originator date description of change a r.willner 09/23/08 new datasheet. b r. willner 05/26/09 datasheet release.
? 2006 integrated device technology, inc. all rights reserved. product specifications subject to change without notice. idt and the idt logo are trademarks of integrated device technology, inc. accelerated thinking is a service mark of integrated device technology, inc. all other brands, product names a nd marks are or may be trademarks or registered trademarks used to identify products or services of their respective owners. printed in usa corporate headquarters integrated device technology, inc. www.idt.com for sales 800-345-7015 408-284-8200 fax: 408-284-2775 for tech support www.idt.com/go/clockhelp innovate with idt and accelerate your future netw orks. contact: www.idt.com idt9170b clock synchronizer and mult iplier clock synthesizer

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