rev 2.1, may 6, 2008 page 1 of 9 2 400 west cesar chavez, austin, tx 7870 1 1+(512) 416 - 8500 1+(512) 416 - 9669 www.silabs.com sl2304nz key features ? dc to 14 0 mhz operating frequency range ? low output clock skew: 5 0ps - typ ? low part -to - part output skew: 100 ps - typ ? low output propogation delay: 2 .5 ns - typ ? 3.3 v +/ - 10% operation supply voltage ? low power dissipation: ? - 7 ma - typ at 33 mhz ? - 9 ma - typ at 66 mhz ? - 12 ma - typ at 133 mhz ? one input to four output fanout buffer drivers ? output enable (oe) control function ? available in 8 - pin tssop package ? available in commercial and industrial grades ? available in lead (pb) free package applications ? general purpose pci /pci - x clock buffer ? printers, mfps and digital copiers ? pcs and work stations ? routers, switche s and servers ? datacom and telecom ? high - speed digital embeded systems description the sl2304nz is a low skew , jitter and power fanout buffer de s igned to produce up to four (4 ) clock outputs from one (1) reference input clock, for high sp eed clock distribution , including pci/pci - x applications. the sl2304 nz products operate from dc to 14 0mhz. the only difference between sl2304 nz - 1 and sl2304nz - 1z i s the oe logic implementation. refer to the available oe logic configuration table. 1 refer to sl23ep04nz products for dc to 220mhz - max frequency range and 2.5v to 3.3v power supply operation, improved skew, jitter and higher drive options. benefits ? up to four (4 ) distribution of input clock ? low propogation delay ? low output -to - output skew ? low output clock jitter ? low power dissipation block diagram logic control clk1 clk2 clk3 clk4 clkin oe gnd vdd low jitter and skew dc to 140mhz clock buffer
rev 2.1, may 6, 2008 page 2 of 9 sl2304nz pin configuration 1 2 3 4 8 7 6 5 clk4 clk3 vdd clk2 gnd clk1 oe clkin 8 - pin tssop pin descrip tion pin number pin name pin type pin description 1 clkin input reference clock input 2 oe output output enable . refer to the table. 1 for logic table 3 clk 1 output buffered clock output 1 4 gnd power power ground. 5 clk 2 output buffered clock outpu t 2 6 vdd output 3.3v power supply 7 clk3 power buffered clock output 3 8 clk4 input buffered clock output 4
rev 2.1, may 6, 2008 page 3 of 9 sl2304nz general description the sl2304nz is a low skew, jitter and power fanout buffer designed to produce up to four (4) clock outputs from one (1) reference input clock, for high speed clock distribution, including pci/pci - x applications. input and output frequency range the input and output frequency is the same (1x) for sl23 04nz - 1 and sl2304 nz - 1z and operates from dc to 14 0mhz clock range with u p to 25pf output load. oe (output enable) function the only difference between sl2304 - 1 and sl2304nz - 1z is the oe logic implementation. when oe=0, sl2404nz - 1 outputs are disabled and outputs are at logic low. in the case of sl2304nz - 1z the outputs a re at high - z. refer to the available oe logic configuration table. 1 below. output clock skew all outputs should drive the similar load to achieve output - to - output skew and input -to - output delay specifications as given in the switching e lectrical table s. power supply range (vdd) the sl23 04nz is designed to operate 3.3v +/ - 10% (3.63v - max to 2.97 v- min) vdd power supply range . an internal on- chip voltage regulator is used to provide to constant power supply of 1.8v, leading to a consistent and stable ele ctric al performance in terms of skew and jitter. the sl23 04nz i/o is powered by using vdd. refer to sl23ep04nz products for dc to 220mhz - max frequency range, 2.5v to 3.3v power supply operation, improved skew, jitter and higher drive options. con tact sli f or 1.8 v power sup ply fan - out buffer and zdb products. clkin (pin - 1) oe (pin - 2) sl2304nz - 1 clkout [1:4] sl2304nz - 1z clkout [1:4] low low low high -z high low low high -z low high low low h igh high high high table 1. available sl2304 clkin and oe logic configurations
rev 2.1, may 6, 2008 page 4 of 9 sl2304nz absolute maximum ratings (all products) description condition min max unit supply voltage, vdd - 0.5 4.6 v all inputs and outputs - 0.5 vdd+0.5 v ambient opera ting temperature in operation, c - grade 0 70 c ambient operating temperature in operation, i - grade -40 85 c storage temperature no power is applied -65 150 c junction temperature in operation, power is applied ? 125 c soldering temperature ? 260 c esd rating (human body model) jedec22 - a114d - 4,000 4,000 v esd rating (charge device model) jedec22 - c101c - 1,500 1,500 v esd rating (machine model) jedec22 - a115d -200 200 v operating conditions (c - grade and vdd=3.3v ) unless otherwise stated vdd= 3.3 v+/ - 10%, cl=15pf and ambient temperature range 0 to +70c description symbol condition min typ max unit operating voltage vdd vdd+/ -10% 2.97 3.3 3.63 v operating temperature ta ambient temperature 0 ? 70 c input capacitance vih pins 1 and 2 ? 3 5 p f output capacitance cl1 all outputs 100mhz ? ? 30 pf cl2 all outputs 140mhz ? ? 15 pf input operating frequency clk in input clock range dc ? 140 mhz input operating frequency clkn2 input clock range, cl=30pf dc ? 100 mhz
rev 2.1, may 6, 2008 page 5 of 9 sl2304nz dc electrical characteristics (c - grade and vdd=3.3v ) unless otherwise stated vdd= 3.3v+/ - 10%, cl=15pf and ambient temperature range 0 to +70c description symbol condition min ty p max unit input low voltage vinl clkin and oe ? ? 0.8 v input high voltage vinh clkin and oe 2.0 ? vdd+0.3 v input low current iinl 0 < vin < 0.8v -5 +/ -2 5 a input high current iinh 2.4v < vin < vdd -5 +/ -2 5 a output low voltage vol1 i ol =24ma ? ? 0.80 v vol2 i ol =12ma ? ? 0.55 v output high voltage voh1 i o h = - 24ma 2.0 ? ? v voh1 i o h = - 12ma 2.4 ? ? v power supply current idd1 clkin=33mhz cl=0 (no load at outputs) ? 7 11 ma power supply current idd2 clkin=66mhz cl=0 (no load at outputs) ? 9 14 ma power supply current idd3 clkin=133mhz cl=0 (no load at outputs) ? 12 18 ma switching electrical characteristics (c - grade and vdd=3.3v ) unless otherwise stated vdd= 3.3v+/ - 10%, cl=15pf and ambient temperature range 0 to +70c description symbol condition min typ max unit output frequency range fout1 cl=15pf dc ? 140 mhz fout1 cl=30pf dc ? 100 mhz output rise /fall time tr /f-1 measured at 0.8v to 2.0v cl=15 pf ? ? 2.0 ns output rise/ fall time t r/ f -2 measured at 0.8v to 2.0v cl= 30pf ? ? 2 .4 ns input duty cycle dc1 measured at vdd/2 20 50 80 % output duty cycle dc2 cl=15pf, fout=140mhz measured at vdd/2 45 ? 55 % output duty cycle dc3 cl=30pf, fout=10 0mhz measured at vdd/2 40 ? 60 % output to output skew skw1 measured at vdd/2 and outpu ts are equally loaded ? 50 100 ps part to part skew skw2 measured at vdd/2 and outputs are equally loaded ? 100 200 ps propagation delay time pdt measured at vdd/2 from clkin to output clock rising edg e 1.5 2 .5 3.5 ns cycle -to - cycle jitter ccj1 clkin=6 6mhz and cl=15 ? 7 5 1 50 ps cycle -to - cycle jitter ccj2 clkin=133mhz and cl=15 ? 50 100 ps
rev 2.1, may 6, 2008 page 6 of 9 sl2304nz operating conditions (i - grade and vdd=3.3v) unless otherwise stated vdd= 3.3v+/ - 10%, cl=15pf and ambient temperature range - 40 to +85c description symbol conditio n min typ max unit operating voltage vdd vdd+/ -10% 2.97 3.3 3.63 v operating temperature ta ambient temperature -40 ? 85 c input capacitance vih pins 1 and 2 ? 3 6 pf output capacitance cl1 all outputs 100mhz ? ? 30 pf cl2 all outputs 140mhz ? ? 1 5 pf input operating frequency clk n 1 input clock range , cl=15pf dc ? 140 mhz input operating frequency clkn2 input clock range, cl=30pf dc ? 100 mhz dc electrical characteristics (i - grade and vdd=3.3v ) unless otherwise stated vdd= 3.3v+/ - 10%, cl=15pf and ambient temperature range - 40 to +85 c description symbol condition min typ max unit input low voltage vinl clkin and oe ? ? 0.8 v input high voltage vinh clkin and oe 2.0 ? vdd+0.3 v input low current iinl 0 < vin < 0.8v -6 +/ -3 6 a input hig h current iinh 2.4v < vin < vdd -6 +/ -3 6 a output low voltage vol i ol =24ma ? ? 0.80 v i ol =12ma ? ? 0.55 v output high voltage voh i o h = - 24ma 2.0 ? ? v i o h = - 12ma 2.4 ? ? v power supply current idd1 clkin=33mhz cl=0 (no load at outputs) ? 8 12 m a power supply current idd2 clkin=66mhz cl=0 (no load at outputs) ? 10 1 5 ma power supply current idd3 clkin=133mhz cl=0 (no load at outputs) ? 14 20 ma
rev 2.1, may 6, 2008 page 7 of 9 sl2304nz switchi ng electri cal characteristics (i - grade and vdd=3.3v ) unless otherwise stated vdd= 3.3v+/ - 10%, cl=15pf and ambient temperature range - 40 to +85 c description symbol condition min typ max unit output frequency range fout1 cl=15pf dc ? 140 mhz fout2 cl=30pf dc ? 100 mhz output rise /fall time tr /f-1 cl=15 pf, measured at 0.8v to 2.0v ? ? 2.2 ns output rise/ fall time tr/f -2 cl=30 pf, measured at 0.8v to 2.0v ? ? 2.6 ns input duty cycle dc1 measured at vdd/2 20 ? 80 % output duty cycle dc2 cl=15pf, fout=140mhz meas ured at vdd/2 45 ? 55 % output duty cycle dc3 cl=30 pf, fout=100mhz measured at vdd/2 40 ? 60 % output to output skew skw1 measured at vdd/2 and outputs are equally loaded ? 60 120 ps part to part skew skw2 measured at vdd/2 and outputs are equally loade d ? 120 240 ps propagation delay time pdt measured at vdd/2 from clkin to output clock rising edge and outputs are equally loaded 1.2 2.5 3.8 ns cycle -to - cycle jitter ccj1 clkin=66mhz and cl=15 ? 80 1 60 ps cycle -to - cycle jitter ccj2 clkin=133mhz and cl= 15 ? 60 120 ps external components & design considerations typical application schematic sl2304nz 0.1f clkin clk2 clk3 gnd vdd 1 6 4 8 5 3 cl clk1 cl cl cl clk4 7 oe 2 recommendations decoupling capacitor: $ g h f r x s o l q j f d s d f l w r u r i ) p x v w e h x v h g e h w z h h q 9 ' ' d q g 9 6 6 s l q v 3 o d f h w k h capacitor on the component side of the pcb as close to the vdd pin as possible. the pcb trace to the vdd pin and to the gnd via should be kept as short as possible. do not use vias between the decoupling capacitor and the vdd pin.
rev 2.1, may 6, 2008 page 8 of 9 sl2304nz package outline and package dimensions 8 - pin tssop (4.4 mm ) 1 4 8 5 6.250( 0.246) 6.500(0.256) 4.300 (0 .169 ) 4.500( 0.177) 2.900(0.114 ) 3.100( 0.122) 0.850(0.033) 0.950(0.037) 0.190(0.007) 0.300(0.012) 0.650(0.025) bsc 0.050(0.002) 0.150(0.006) 1.100(0.043) max 0.076(0.003) 0 to 8 0.500(0.020) 0.700( 0.027) 0.250(0.010) bsc gauge plane 0.090(0.003) 0.200(0.008) dimensions are in milimeters(inches). top line : (min) and bottom line : (max) pin-1 id seating plane thermal characteristics parameter symbol condition min typ max unit thermal resistance junction to ambient ja still air - 110 - c/w ja 1m/s air flow - 100 - c/w ja 3m/s air flow - 80 - c/w thermal resistance junction to case jc independent of air flow - 35 - c/w
rev 2.1, may 6, 2008 page 9 of 9 sl2304nz ordering information [1 ] ordering number marking shipping package package te mperature sl2304nzzc -1 sl2304nzc - 1 tube 8 - pin tssop 0 to 70c sl2304nzzc -1t sl2304nzc - 1 tape and reel 8 - pin tssop 0 to 70c sl2304nzzi - 1 sl2304nzi - 1 tube 8 - pin tssop - 40 to 85c sl2304nzzi -1t sl2304nzi -1 tape and reel 8 - pin tssop - 40 to 85c sl2304nzz c - 1z sl2304nzc - 1z tube 8 - pin tssop 0 to 70c sl2304nzzc - 1zt sl2304nzc - 1z tape and reel 8 - pin tssop 0 to 70c sl2304nzzi - 1z sl2304nzi - 1z tube 8 - pin tssop - 40 to 85c sl2304nzzi - 1zt sl2304nzi -1z tape and reel 8 - pin tssop - 40 to 85c notes: 1 . the sl23 04nz products are rohs compliant. the information in this document is believed to be accurate in all respects at the time of publication but is subject to chan ge without notice. silicon laboratories assumes no responsibility for errors and omi ssions, and disclaims responsibility for any consequences resulting from the use of information included herein. additionally, silicon laboratories assumes no responsibility for the f unctioning of undescribed features or parameters. silicon laboratories re serves the right to make changes without further notice. silicon laboratories makes no warranty, representation or guarantee regarding the suitability of its products for any particular purp ose, nor does silicon laboratories assume any liability arising ou t of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. silicon laboratories products are no t designed, intended, or authorized for use in ap plications intended to support or sustain life, or for any other application in which the failure of the silicon laboratories product could create a situation where personal injury or death may occur. should buyer purchase or use silicon laboratories produ cts for any such unintended or unauthorized application, buyer shall indemnify and hold silicon laboratories harmless against all claims and damages.
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