1 precision edge sy10el38/l sy100el38/l micrel, inc. m9999-031006 hbwhelp@micrel.com or (408) 955-1690 the sy10/100el38/l are low skew 2, 4/6 clock generation chips designed explicitly 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 0.01 f capacitor. the v bb output is designed to act as the switching reference for the input of the el38/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 input clock, therefore, all associated specification limits are referenced to the negative edge of the clock input. the phase_out output will go high for one clock cycle whenever the 2 and the 4/6 outputs are both transitioning from a low to a high. this output allows for clock synchronization within the system. upon start-up, the internal flip-flops will attain a random state; the master reset (mr) input allows for the synchronization of the internal dividers, as well as for multiple el38/ls in a system. 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 20-pin soic package description features 5v/3.3v 2, 4/6 clock generation chip precision edge sy10el38/l sy100el38/l rev.: g amendment: /0 issue date: march 2006 precision edge precision edge is a registered trademark of micrel, inc.
2 precision edge sy10el38/l sy100el38/l micrel, inc. m9999-031006 hbwhelp@micrel.com or (408) 955-1690 package/ordering information ordering information (1) package operating package lead part number type range marking finish sy10el38lzc z20-1 commercial sy10el38lzc sn-pb sy10el38lzctr (2) z20-1 commercial sy10el38lzc sn-pb sy100el38lzc z20-1 commercial sy100el38lzc sn-pb sy100el38lzctr (2) z20-1 commercial sy100el38lzc sn-pb sy10el38lzi z20-1 industrial sy10el38lzi sn-pb sy10el38lzitr (2) z20-1 industrial sy10el38lzi sn-pb sy100el38lzi z20-1 industrial sy100el38lzi sn-pb SY100EL38LZITR (2) z20-1 industrial sy100el38lzi sn-pb sy10el38lzg (3) z20-1 industrial sy10el38lzg with pb-free pb-free bar-line indicator nipdau sy10el38lzgtr (2, 3) z20-1 industrial sy10el38lzg with pb-free pb-free bar-line indicator nipdau sy100el38lzg (3) z20-1 industrial sy100el38lzg with pb-free pb-free bar-line indicator nipdau sy100el38lzgtr (2, 3) z20-1 industrial sy100el38lzg with pb-free pb-free bar-line indicator nipdau notes: 1. contact factory for die availability. dice are guaranteed at t a = 25 c, dc electricals only. 2. tape and reel. 3. pb-free package is recommended for new designs. 1 vcc /en divsel clk /clk vbb mr vcc phased_out /phased_out 20 vcc q0 /q0 q1 /q1 q2 /q2 q3 /q3 vee 19 18 17 16 15 14 13 12 11 2 3 4 5 6 7 8 9 10 20-pin soic (z20-1)
3 precision edge sy10el38/l sy100el38/l micrel, inc. m9999-031006 hbwhelp@micrel.com or (408) 955-1690 t a = ?0 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. min. typ. max. unit i ee power supply current ma 10el 35 50 65 35 65 35 65 35 65 100el 35 50 65 35 65 35 65 35 75 v bb output reference v voltage 10el -1.43 -1.30 -1.38 -1.27 -1.35 -1.25 -1.31 -1.19 100el -1.38 -1.26 -1.38 -1.26 -1.38 -1.26 -1.38 -1.26 i ih input high current 150 150 150 150 a dc electrical characteristics (1) v ee = v ee (min.) to v ee (max.); v cc = gnd note: 1. parametric values specified at: 5 volt power supply range 100el38 series: -4.2v to -5.5v. 10el38 series -4.75v to -5.5v. 3 volt power supply range 10/100el38l series: -3.0v to -3.8v. clk en mr function z l l divide zz h l hold q 0? x x h reset q 0? truth table note: z = low-to-high transition zz = high-to-low transition divsel q 2, q 3 outputs 0 divide by 4 1 divide by 6 pin function clk differential clock inputs en synchronous enable mr master reset v bb reference output q 0, q 1 differential 2 outputs q 2, q 3 differential 4/6 outputs divsel frequency select input pin names
4 precision edge sy10el38/l sy100el38/l micrel, inc. m9999-031006 hbwhelp@micrel.com or (408) 955-1690 t a = -40 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. min. typ. max. unit f max maximum toggle frequency 1000 1000 1000 1000 mhz t pd propagation delay to output ps clk ? output (diff.) 950 1150 950 1150 970 1170 1050 1250 clk ? output (s.e.) 900 1200 900 1200 920 1220 1000 1300 mr ? output 600 900 600 900 600 900 600 900 t skew within-device skew (2) q 0 ?q 3 50 50 50 ?0ps all75 75 75 ?5 part-to-part q 0 ?q 3 (diff.) 200 200 200 200 all 240 240 240 240 t s set-up time en ? clk 300 150 150 150 150 ps divsel ? clk300 t h hold time clk ? en 400 150 400 150 400 150 400 150 ps clk ? divsel 400 200 400 200 400 200 400 200 v pp minimum input swing (3) clk 250 250 250 250 mv v cmr common mode range (4) clk ?.3 ?.4 ?.4 ?.4 ?.4 ?.4 ?.4 ?.4 v t rr reset recovery time 100 100 100 100 ps t pw minimum pulse width clk 800 800 800 800 ps mr 700 700 700 700 t r output rise/fall times q 280 550 280 550 280 550 280 550 ps t f (20% ?0%) ac electrical characteristics (1) v ee = v ee (min.) to v ee (max.); v cc = gnd notes: 1. parametric values specified at: 5 volt power supply range 100el38 series: -4.2v to -5.5v. 10el38 series -4.75v to -5.5v. 3 volt power supply range 10/100el38l series: -3.0v to -3.8v. 2. skew is measured between outputs 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 the differential input signal. normal operation is obtained if the high level falls within the specified range and the peak-to-peak voltage lies between v pp min. and 1v. the lower end of the cmr range varies 1:1 with v ee . the numbers in the spec table assume a nominal v ee = ?.3v. note for pecl operation, the v cmr (min) will be fixed at 3.3v ?iv cmr (min)i.
5 precision edge sy10el38/l sy100el38/l micrel, inc. m9999-031006 hbwhelp@micrel.com or (408) 955-1690 logic diagram timing diagrams clk clk en r mr divsel q 0 r r phase out logic r q 0 q 1 q 1 q 2 q 2 q 3 q 3 phased_out phased_out ( 2) ( 4/6) clk q ( 2) q ( 4) q ( 6) phase_out( 4) phase_out( 6)
6 precision edge sy10el38/l sy100el38/l micrel, inc. m9999-031006 hbwhelp@micrel.com or (408) 955-1690 20-pin soic .300" wide (z20-1) rev. 03 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 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. ? 2006 micrel, incorporated.
|
