the sy10/100el15 are low skew 1:4 clock distribution chips designed explicitly for low skew clock distribution applications. the device can be driven by either a differential or single-ended ecl or, if positive power supplies are used, pecl input signal. if a single-ended input is to be used the v bb output should be connected to the clk input and bypassed to v cc via a 0.01 f capacitor. the v bb output is designed to act as the switching reference for the input of the el15 under single- ended input conditions, as a result this pin can only source/sink up to 0.5ma of current. the el15 features a multiplexed clock input to allow for the distribution of a lower speed scan or test clock along with the high speed system clock. when low (or left open and pulled low by the input pull-down resistor) the sel pin will select the differential clock input. the common enable (en) is synchronous so that the outputs will only be enabled/disabled when they are already in the low state. this avoids any chance of generating a runt clock pulse when the device is enabled/ disabled as can happen with an asynchronous control. the internal flip flop is clocked on the falling edge of the input clock, therefore all associated specification limits are referenced to the negative edge of the clock input. pin function clk differential clock inputs sclk synchronous clock input en synchronous enable sel clock select input v bb reference output q 0-3 differential clock outputs truth table pin names features description pin configuration/block diagram precision edge sy10el15 sy100el15 final clk sclk sel en q l xlll hxllh xlhll xhhlh xxxhl* * on next negative transition of clk or sclk v cc clk q 0 q 0 q 1 q 2 q 2 q 3 q 3 v ee sel v bb clk en 16 15 14 13 12 11 10 9 q 1 1 2 34567 8 d q 1 0 sclk soic top view 50ps output-to-output skew synchronous enable/disable multiplexed clock input 75k ? internal input pull-down resistors available in 16-pin soic package 1:4 clock distribution 1 rev.: g amendment: /0 issue date: february 2003 precision edge is a trademark of micrel, inc. precision edge
2 precision edge sy10el15 sy100el15 micrel symbol rating value unit v ee power supply (v cc = 0v) ?.0 to 0 vdc v i input voltage (v cc = 0v) 0 to ?.0 vdc i out output current ?ontinuous 50 ma ?urge 100 t a operating temperature range ?0 to +85 c v ee operating range (1),(2) ?.7 to ?.2 v notes: 1. absolute maximum rating, beyond which, device life may be impaired, unless otherwise specified on an individual data sheet. 2. parametric values specified at: 100el15 series: ?.2v to ?.5v. 10el15 series ?.75v to ?.5v. absolute maximum ratings (1) note: 1. 10el circuits are designed to meet the dc specifications shown in the table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and transverse airflow greater than 500lfpm is maintained. outputs are terminated throug h a 50 ? resistor to ?.0v except where otherwise specified on the individual data sheets. t a = ?0 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. max. min. max. min. typ. max. min. max. unit v oh output high voltage ?080 ?90 ?020 ?40 ?80 ?10 ?10 ?20 mv v ol output low voltage ?950 ?650 ?950 ?630 ?950 ?630 ?950 ?595 mv v ih input high voltage ?230 ?90 ?170 ?40 ?130 ?10 ?060 ?20 mv v il input low voltage ?950 ?500 ?950 ?480 ?950 ?480 ?950 ?445 mv i ih input high current 150 150 150 150 a i il input low current 0.5 0.5 0.5 0.5 a i ee power supply current 35 35 25 35 38 ma v bb output reference voltage ?.38 ?.26 ?.38 ?.26 ?.38 ?.26 ?.38 ?.26 v 10el dc electrical characteristics v ee = v ee (min.) to v ee (max.); v cc = gnd (1) product ordering code ordering package operating marking code type range code sy10el15zc z16-2 commercial hel15 sy10el15zctr* z16-2 commercial hel15 sy100el15zc z16-2 commercial xel15 sy100el15zctr* z16-2 commercial xel15 *tape and reel note 1. recommended for new designs. ordering package operating marking code type range code sy10el15zi (1) z16-2 industrial hel15 sy10el15zitr* (1) z16-2 industrial hel15 sy100el15zi (1) z16-2 industrial xel15 sy100el15zitr* (1) z16-2 industrial xel15 *tape and reel
3 precision edge sy10el15 sy100el15 micrel t a = ?0 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. max. min. max. min. typ. max. min. max. unit v oh output high voltage (2) ?085 ?80 ?025 ?80 ?025 ?55 ?80 ?025 ?80 mv v ol output low voltage (2) ?830 ?555 ?810 ?620 ?810 ?705 ?620 ?810 ?620 mv v oha output high voltage (3) ?095 ?035 ?035 ?035 mv v ola output low voltage (3) ?555 ?610 ?610 ?610 mv v ih input high voltage ?165 ?80 ?165 ?80 ?165 ?80 ?165 ?80 mv v il input low voltage ?810 ?475 ?810 ?475 ?810 ?475 ?810 ?475 mv i ih input high current 150 150 150 150 a i il input low current (4) 0.5 0.5 0.5 0.5 a i ee power supply current 35 35 25 35 38 ma v bb output reference voltage ?.38 ?.26 ?.38 ?.26 ?.38 ?.26 ?.38 ?.26 v 100el dc electrical characteristics v ee = v ee (min.) to v ee (max.); v cc = gnd (1) notes: 1. this table replaces the three traditionally seen in ecl 100k data books. the same dc parameter values at v ee = ?.5v now apply across the full v ee range of ?.2v to ?.5v. outputs are terminated through a 50 ? resistor to ?.0v except where otherwise specified on the individual data sheets. 2. v in = v ih (max) or v il (min). 3. v in = v ih (min) or v il (max). 4. v in = v il (max). t a = ?0 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. max. min. max. min. typ. max. min. max. unit t plh propagation delay ps t phl clk to q (diff) 460 660 470 670 470 670 500 700 clk to q (se) 410 710 420 720 420 720 450 750 sclk to q 410 710 420 720 420 720 470 750 t skew part-to-part skew (1) 200 200 200 200 ps within-device skew 50 50 50 50 t s setup time en 150 150 150 150 ps t h hold time en 400 400 400 400 ps v pp minimum input clk 250 250 250 250 mv swing v cmr common mode clk ?.0 ?.4 ?.0 ?.4 ?.0 ?.4 ?.0 ?.4 v range t r output rise/fall times q 325 575 325 575 325 575 ps t f (20% ?80%) ac electrical characteristics v ee = v ee (min) to v ee (max); v cc = gnd note: 1. skews are specified for identical low-to-high or high-to-low transitions.
4 precision edge sy10el15 sy100el15 micrel 16 lead soic .150" wide (z16-2) rev. 02 micrel, inc. 1849 fortune drive san jose, ca 95131 usa tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 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. ? 2003 micrel, incorporated.
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