abb0210 low skew output buffer 30332 esperanza.,rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 www.abracon.com rev 03/22/05 page 1 features ? frequency range 50 ~ 120mhz. ? internal phase locked loop will allow spread spec- trum modulation on reference clock to pass to out- puts. ? zero input - output delay. ? less than 700 ps device - device skew. ? less than 250 ps skew between outputs. ? less than 100 ps cycle - cycle jitter. ? 2.5v or 3.3v power supply operation. ? available in 8-pin so ic or msop package. description the abb0210 is a high performance, low skew, low jitter zero delay buffer designed to distribute high speed clocks and is availabl e in 8-pin soic or msop package. it has two outputs that are synchronized with the input. the synchronization is established via clkout feed back to the input of the pll. since the skew between the input and output is less than 350 ps, the device acts as a zero delay buffer. pin configuration block diagram 1 2 3 4 5 6 7 8 refin gnd clk1 clk2 clkout dnc vdd dnc abb0210 pll refin clkout clk1 clk2
abb0210 low skew output buffer 30332 esperanza., rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 www.abracon.com rev 03/17/05 page 2 pin descriptions name number type description refin 1 i input reference frequency. spread spectrum modulation on this signal will be passed to the output (up to 100khz sst modulation). gnd 2 p ground connection. clk1 3 o buffered clock output. clk2 4 o buffered clock output. vdd 5 p 2.5v or 3.3v power supply connection. dnc 6 & 7 - do not connect clkout2 8 o buffered clock output. internal feed back on this pin. electrical specifications 1. absolute maximum ratings parameters symbol min. max. units supply voltage v dd 4.6 v input voltage, dc v i -0.5 v dd +0.5 v output voltage, dc v o -0.5 v dd +0.5 v storage temperature t s -65 150 c ambient operating temperature* t a -40 85 c junction temperature t j 125 c lead temperature (soldering, 10s) 260 c exposure of the device under conditions beyond the limits spec ified by maximum ratings for extended periods may cause permanent damage to the device and affect product reliability. these conditions repres ent a stress rating only, and functional operations of the devic e at these or any other con- ditions above the operational limits noted in this specification is not implied. * note : operating temperature is guaranteed by design for all parts (c ommercial and industrial), but tested for commercial grade only . 2. electrical characteristics parameters symbol conditions min. typ. max. units supply voltage v dd 2.25 3.63 v input low voltage v il 0.8 v input high voltage v ih 2.0 v output low voltage v ol i ol = 24ma 0.4 v output high voltage v oh i oh = 24ma 2.4 v supply current i dd unloaded outputs at 100mhz, vdd=3.3v. 22 30 ma
abb0210 low skew output buffer 30332 esperanza., rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 www.abracon.com rev 03/17/05 page 3 3. switching characteristics parameters symbol description min. typ. max. units output frequency t1 50 120 mhz duty cycle dc measured at vdd/2, c l =15pf, f out = 100mhz 45 50 55 % rise time t r measured between 10% and 90%vdd, c l =15pf 1.2 1.5 ns fall time t f measured between 90% and 10%, c l =15pf 1.2 1.5 ns output to output skew t skew all outputs equally loaded, c l =15pf 250 ps delay, ref rising edge to clkout rising edge t delay measured at vdd/2 0 350 ps device to device skew t dsk-dsk measured at v dd /2 on the clkout pins of devices 0 700 ps cycle to cycle jitter t cyc-cyc measured at 100mhz 60 ps peak pll lock time t lock stable power supply, valid clock presented on ref pin 1.0 ms jitter; absolute jitter t jabs at 10,000 cycles, low jitter input signal 20 50 ps jitter; 1-sigma t j1-s at 10,000 cycles, low jitter input signal 9 15 ps switching waveforms duty cycle timing t1 t2 vdd/2 vdd/2 vdd/2 output - output skew vdd/2 vdd/2 t skew output output
abb0210 low skew output buffer 30332 esperanza., rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 www.abracon.com rev 03/17/05 page 4 switching wave forms all outputs rise/fall time 0.8v 2.0v output t r t f 2.0v 0.8v 3.3v 0v input to output propagation delay input output vdd/2 t delay vdd/2 device to device skew device1 clkout device2 clkout vdd/2 t dsk - dsk vdd/2
abb0210 low skew output buffer 30332 esperanza., rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 www.abracon.com rev 03/17/05 page 5 output-output skew ref clkout the skew between clkout and the clk(1-2) outputs is not dynamically adjusted by the pll. since clkout is one of the inputs to the pll, zero phase difference is maintained from ref to clkout. if all outputs are equa lly loaded, zero phase difference will be maintained from ref to all outputs. if applications requiring zero output-output skew, all the outputs must be equally loaded. if the clk(1-2) outputs are less loaded than cl kout, clk(1-2) outputs will lead it; if the clk(1-2) is more loaded than clkout, clk(1-2) will lag the clkout. since the clkout and the clk(1-2) outputs are identical, they all start at the same time, but difference loads cause them to have diffe rent rise times and di fferent times crossing the measurement thresholds. clk(1-2) zero delay ref clkout clk(1-2) advanced ref clkout clk(1-2) delayed ref input and all outputs are equally loaded ref input and clk(1-2) outputs are equally loaded, with clk(1-2) less loaded than clkout. ref input and clk(1-2) outputs loaded equally, withclk(1-2) more loaded then clkout.
abb0210 low skew output buffer 30332 esperanza., rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 www.abracon.com rev 03/17/05 page 6 package information soic 8l ordering information abracon corporation, reserves the right to make changes in its products or specifications, or bo th at any time without notice. the information fur- nished by abracon is believed to be accurate and reliable. ho wever, abracon makes no guarantee or warranty concerning the accu racy of said infor- mation and shall not be responsible for any loss or damage of wh atever nature resulting from the use of, or reliance upon this product. life support policy : abracon?s products are not authorized for use as critical comp onents in life support devices or systems without the express written approval of the president of abracon corporation. dimension in mm symbol min. max. a 1.35 1.75 a1 0.10 0.25 a2 1.25 1.50 b 0.33 0.53 c 0.19 0.27 d 4.80 5.00 e 3.80 4.00 h 5.80 6.20 l 0.40 0.89 e 1.27 bsc for part ordering, please contact our sales department: 30332 esperanza., rancho santa margarita, ca 92688 ph: 949-546-8000 fax: 949-546-8001 part number the order number for this device is a combination of the following: device number, package type and operating temperature range abb0210 s c order number marking package option ABB0210SC-T abb0210sc soic - tape and reel abb0210sc abb0210sc so ic - tube part number temperature c=commercial i=industrial package type s=soic i c l a2 e h d a1 e b a
|
