sy10el34/l sy100el34/l 5v/3.3v 2, 4, 8 clock generation chip precision edge ? precision edge is a register ed trademark of micrel, inc. micrel inc. 2180 fortune drive san jose, ca 95131 usa tel +1 ( 408 ) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com december 2011 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 general description the sy10/100el34/l are low-skew 2, 4, 8 clock generation chips designed explic itly for low-skew clock generation applications. the internal dividers are synchronous to each other; therefore, the common output edges are all precisely aligned. the devices can be driven by either a differential or single-ended ecl or, if positive power supplies are used, pecl input signal. in addition, by using the v bb output, a sinusoidal source can be ac- coupled into the device. if a single-ended input is to be used, the v bb output should be connected to the clk input and bypassed to ground via a 0.01f capacitor. the v bb output is designed to act as the switching reference for the input of the el34/ l under single-ended input conditions. as a result, this pin can only source/ sink up to 0.5ma of current. the common enable ( en ) is synchronous so that the internal dividers will only be enabled/disabled when the internal clock is already in the low state. this avoids any chance of generating a runt clock pulse on the internal clock when the device is enabled/disabled as can happen with an asynchronous control. an internal runt pulse could lead to losing synchronization between the internal divider stages. the internal enable flip-flop is clocked on the falling edge of the divider stages. the internal enable flip- flop is clocked on the falling edge of the input clock; therefore, all associated specif ication limits are referenced to the negative edge of the clock input. upon start-up, the internal f lip-flops will attain a random state; the master reset (mr) input allows for the synchronization of the internal dividers, as well as for multiple el34/ls in a system. data sheets and support documentation can be found on micrels web site at: www.micrel.com . precision edge ? features ? 3.3v and 5v power supply options ? 50ps output-to-output skew ? synchronous enable/disable ? master reset for synchronization ? internal 75k ? input pull-down resistors ? available in 16-pin soic package pin description pin name pin function clk differential clock inputs. en synchronous enable. mr master reset. v bb reference output. q 0 differential 2 outputs. q 1 differential 4 outputs. q 2 differential 8 outputs. downloaded from: http:///
micrel, inc. precision edge ? sy10el34/l sy100el34/l december 2011 3 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 ordering information part number package type operating range package marking lead finish sy10el34lzg z16-2 industrial sy10el34lzg with pb-free bar line indicator pb-free nipdau sy10el34lzgtr (2) z16-2 industrial sy10el34lzg with pb-free bar line indicator pb-free nipdau SY100EL34LZG z16-2 industrial SY100EL34LZG with pb-free bar line indicator pb-free nipdau SY100EL34LZGtr (2) z16-2 industrial SY100EL34LZG with pb-free bar line indicator pb-free nipdau sy10el34zg z16-2 industrial sy10el34zg with pb-free bar line indicator pb-free nipdau sy10el34zgtr (2) z16-2 industrial sy10el34zg with pb-free bar line indicator pb-free nipdau sy100el34zg z16-2 industrial sy100el34zg with pb-free bar line indicator pb-free nipdau sy100el34zgtr (2) z16-2 industrial sy100el34zg with pb-free bar line indicator pb-free nipdau notes: 1. contact factory for die availability. dice are guaranteed at t a = 25 c, dc electricals only. 2. tape and reel. pin configuration 16-pin narrow soic (z16-2) downloaded from: http:///
micrel, inc. precision edge ? sy10el34/l sy100el34/l december 2011 4 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 dc electrical characteristics (1) v ee = v ee (minimum) to v ee (maximum); v cc = gnd. symbol paramete r min. typ. max. units t a = ? 40 c i ee power supply current ma 10el ? ? 49 100el ? ? 49 v bb output reference voltage v 10el ? 1.43 ? 1.30 100el ? 1.38 ? 1.26 i ih input high current ? ? 150 a t a = 0 c i ee power supply current ma 10el ? ? 49 100el ? ? 49 v bb output reference voltage v 10el ? 1.38 ? 1.27 100el ? 1.38 ? 1.26 i ih input high current ? ? 150 a t a = + 25 c i ee power supply current ma 10el ? ? 49 100el ? ? 49 v bb output reference voltage v 10el ? 1.35 ? 1.25 100el ? 1.38 ? 1.26 i ih input high current ? ? 150 a t a = + 85 c i ee power supply current ma 10el ? ? 49 100el ? ? 54 v bb output reference voltage v 10el ? 1.31 ? 1.19 100el ? 1.38 ? 1.26 i ih input high current ? ? 150 a note: 1. parametric values specified at: ? 5v power supply range: 100el34 series: ? 4.2v to ? 5.5v 10el34 series: ? 4.75v to ? 5.5v ? 3v power supply range: 10/100el34l series: ? 3.0v to ? 3.8v downloaded from: http:///
micrel, inc. precision edge ? sy10el34/l sy100el34/l december 2011 5 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 ac electrical characteristics (1) v ee = v ee (minimum) to v ee (maximum); v cc = gnd. symbol paramete r min. typ. max. units t a = ? 40 c t pd propagation delay to output ps clk 960 1100 1200 mr 650 800 1010 t skew within-device skew (2) ? ? 50 ps t s set-up time ( en ) 400 ? ? ps t h hold time ( en ) 200 ? ? ps v pp minimum input swing (3) 250 ? ? mv v cmr common-mode range (4) ? 1.3 ? ? 0.4 v t r t f output rise/fall times q (20% ? 80%) 275 400 525 ps t a = 0 c t pd propagation delay to output ps clk 960 1100 1200 mr 650 800 1010 t skew within-device skew (2) ? ? 50 ps t s set-up time ( en ) 400 ? ? ps t h hold time ( en ) 200 ? ? ps v pp minimum input swing (3) 250 ? ? mv v cmr common-mode range (4) ? 1.4 ? ? 0.4 v t r t f output rise/fall times q (20% ? 80%) 275 400 525 ps t a = + 25 c t pd propagation delay to output ps clk 960 1100 1200 mr 650 800 1010 t skew within-device skew (2) ? ? 50 ps t s set-up time ( en ) 400 ? ? ps t h hold time ( en ) 200 ? ? ps v pp minimum input swing (3) 250 ? ? mv v cmr common-mode range (4) ? 1.4 ? ? 0.4 v t r t f output rise/fall times q (20% ? 80%) 275 400 525 ps downloaded from: http:///
micrel, inc. precision edge ? sy10el34/l sy100el34/l december 2011 6 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 ac electrical characteristics (1) (continued) v ee = v ee (minimum) to v ee (maximum); v cc = gnd. symbol paramete r min. typ. max. units t a = + 85 c t pd propagation delay to output ps clk 960 1100 1200 mr 650 800 1010 t skew within-device skew ? ? 50 ps t s set-up time ( en ) 400 ? ? ps t h hold time ( en ) 200 ? ? ps v pp minimum input swing (3) 250 ? ? mv v cmr common-mode range (4) ? 1.4 ? ? 0.4 v t r t f output rise/fall times q (20% ? 80%) 275 400 525 ps notes: 1. parametric values specified at: ? 5v power supply range: 100el34 series: ? 4.2v to ? 5.5v 10el34 series: ? 4.75v to ? 5.5v ? 3v power supply range: 10/100el34l series: ? 3.0v to ? 3.8v 2. skew is measured between ou tputs under identical transitions. 3. minimum input swing for which ac parameters are guaranteed. the device will function reliably with differential inputs down to 100mv. 4. the cmr range is referenced to the most positive side of t he differential input signal. norm al operation is obtained if the high level falls within the specified range and the peak-to-peak voltage lies between v pp minimum and 1v. the lower end of the cmr range varies 1:1 with v ee . the numbers in the specification table assume a nominal v ee = ? 3.3v. note for pecl operation, the v cmr(min) will be fixed at 3.3v ? i vcmr(min) i. truth table clk en mr function z l l divide zz h l hold q 0 ? 2 x x h reset q 0 ? 2 notes : z = low-to-high transition zz = high-to-low transition downloaded from: http:///
micrel, inc. precision edge ? sy10el34/l sy100el34/l december 2011 7 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 timing diagram the en signal will freeze the internal clocks to the flip-flops on t he first falling edge of clk after its assertion. the internal dividers will maintain their state during the internal clock free ze and will return to clocking once the internal clocks are unfrozen. the outputs will transition to thei r next states in the same manner, time and relationship as they would have had the en signal not been asserted. downloaded from: http:///
micrel, inc. precision edge ? sy10el34/l sy100el34/l december 2011 8 m9999-120611-i hbwhelp@micrel.com or (408) 955-1690 package information 16-pin .150 wide soic (z16-2) 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 micrel makes no representations or warranties with respect to t he accuracy or completeness of the information furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for it s use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether expre ss, implied, arising by estoppel or other wise, to any intellectual property rights is granted by this document. except as provided in micrels terms and conditions of sale for such products, mi crel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including l iability or warranties relating to fitness for a particular purpose, merchantability, or infringement of an y patent, copyright or other intellectual p roperty right. micrel products are not designed or authori zed for use as components in life support app liances, devices or systems where malfu nction of a product can reasonably be expected to result in pers onal injury. life support devices or system s are devices or systems that (a) are in tended 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 significan t injury to the user. a purchasers use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2006 micrel, incorporated. downloaded from: http:///
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