1 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 the sy89830u is a high-speed, 2.5ghz differential pecl 1:4 fanout buffer optimized for ultra-low skew applications.within device skew is guaranteed to be less than 25ps over temperature and supply voltage. the wide supply voltage operation allows this fanout buffer to operate in 2.5v, 3.3v, and 5v systems. the sy89830u features a 2:1 input mux, making it an ideal solution for redundant clock switchover applications.if only one input pair is used, the other pair may be left floating. in addition, this device includes a synchronous enable pin that forces the outputs into a fixed logic state. enable or disable state is initiated only after the outputs are in a low state, thus eliminating the possibility of a runt clock pulse. the sy89830u i/o are fully differential and 100k ecl compatible. differential 10k ecl logic can interface directlyinto the sy89830u inputs. the sy89830u is part of micrels high-speed precision edge timing and distribution family. for applications thatrequire a different i/o combination, consult the micrel website at www.micrel.com, and choose from a comprehensive product line of high-speed, low-skew fanout buffers, translators, and clock generators. features description rev.: e amendment: /0 issue date: november 2005 guaranteed ac parameters over temp/voltage: ? > 2.5ghz f max ? < 25ps within-device skew ? < 225ps t r /t f time ? < 450ps prop delay low jitter design: ? < 1ps rms cycle-to-cycle jitter ? < 15ps pp total jitter 2:1 differential mux input flexible supply voltage: 2.5v/3.3v/5v wide operating temperature range: C40 c to +85 c 100k ecl compatible outputs inputs accept pecl/lvpecl/ecl/hstl logic levels available in a 16-pin tssop package precision edge is a registered trademark of micrel, inc. precision edge ? precision edge ? sy89830u 2.5v/3.3/5v 2.5ghz 1:4 pecl/eclclock driver with 2:1 differential input mux downloaded from: http:///
2 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 truth table (1) in0 in1 in_sel /en q lx l ll hx l lh xl h ll xh h lh xlhl xh h l note: 1. = negative edge pin number pin name pin function 1, 2, 3, 4, q0 to q3 (lv)pecl, (lv)ecl differential outputs: terminate with 50 to v cc C2v. for 5, 6, 7, 8 /q0 to /q3 single-ended applications, terminate the unused output with 50 to v cc C2v. 9v ee negative power supply: for lvpecl, pecl applications, connect to gnd. 10 in_sel (lv)pecl, (lv)ecl compatible 2:1 mux input signal select: when in_sel is low, the in0 input pair is selected. when in_sel is high, the in1 input pair is selected. includes a 75k pull-down. default state is low and in0 is selected. 11, 12, 13, 14 in0, /in0 (lv)pecl, (lv)ecl, hstl clock or data inputs. in1, /in1 internal 75k pull-down resistors on in0, in1. internal 75k pull-up and 75k pull-down resistors on /in0, /in1./in0, /in1 default condition is v cc /2 when left floating. in0, in1 default condition is low when left floating. 15 /en (lv)pecl, (lv)ecl compatible synchronous enable: when /en goes high, q out will go low and /q out will go high on the next low input clock transition. includes a 75k pull-down. default state is low when left floating. the internal latch is clocked on the falling edge of the input (in0, in1) 16 v cc positive power supply: bypass with 0.1 f//0.01 f low esr capacitors. pin description package/ordering information 16-pin tssop (t32-1) ordering information (1) package operating package lead part number type range marking finish sy89830uk4i k4-16-1 industrial 89830u sn-pb sy89830uk4itr (2) k4-16-1 industrial 89830u sn-pb SY89830UK4G (3) k4-16-1 industrial 89830u with nipdau pb-free bar line indicator pb-free SY89830UK4Gtr (2, 3) k4-16-1 industrial 89830u with nipdau pb-free bar line indicator pb-free 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 q0 /q0 q1 /q1 q2 /q2 q3 /q3 16 vcc/en /in1 in1 /in0 in0 in_se l vee 2 15 3 14 4 13 5 12 6 11 7 10 8 9 d q 10 downloaded from: http:///
3 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 symbol rating value unit v cc C v ee power supply voltage 6.0 v v in input voltage (v cc = 0v, v in not more negative than v ee ) C 6.0 to 0 v input voltage (v ee = 0v, v in not more positive than v cc ) +6.0 to 0 i out output current C continuous 50 ma C surge 100 t a operating temperature range C 40 to +85 c t lead lead temperature (soldering, 20sec.) 260 c t store storage temperature range C 65 to +150 c ja package thermal resistance C still-air (single-layer pcb) 115 (junction-to-ambient) C still-air (multi-layer pcb) 75 c/w C 500lfpm (multi-layer pcb) 65 jc package thermal resistance 21 c/w (junction-to-case) note: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional operation is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum ratlng conditions for extended periods may affect device reliability. absolute maximum ratings (1) t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v cc power supply voltage v (pecl) 4.5 5.0 5.5 4.5 5.0 5.5 4.5 5.0 5.5 (lvpecl) 2.375 3.3 3.63 2.375 3.3 3.63 2.375 3.3 3.63 (ecl) C 5.5 C 5.0 C 4.5 C 5.5 C 5.0 C 4.5 C 5.5 C 5.0 C 4.5 (lvecl) C 3.63 C 3.3 C 2.375 C 3.63 C 3.3 C 2.375 C 3.63 C 3.3 C 2.375 i cc power supply current 70 50 72 75 ma i ih input high current 150 150 150 av in = v ih i il input low current in 0.5 0.5 0.5 av in = v il /in C 150 C 150 C 150 av in = v il c in input capacitance (tssop) 1.0 pf dc electrical characteristics (1) note: 1. 100kep circuits are designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. downloaded from: http:///
4 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v il input low voltage 555 875 555 875 555 875 mv v cc = 2.5v (single-ended) v ih input high voltage 1275 1620 1275 1620 1275 1620 mv v cc = 2.5v (single-ended) v ol output low voltage 555 680 805 555 680 805 555 680 805 mv v cc = 2.5v v oh output high voltage 1355 1480 1605 1355 1480 1605 1355 1480 1605 mv v cc = 2.5v v ihcmr input high voltage 1.2 v cc 1.2 v cc 1.2 v cc v common mode range (2) (100kep) lvpecl dc electrical characteristics (1) v cc = 2.5v 5%, v ee = 0v notes: 1. 100kep circuits are designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. input and output parameters vary 1:1 with v cc . output load is 50 to v cc C2v. 2. the v ihcmr range is referenced to the most positive side of the differential input signal. t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v il input low voltage 1355 1675 1355 1675 1355 1675 mv v cc = 3.3v (single-ended) v ih input high voltage 2075 2420 2075 2420 2075 2420 mv v cc = 3.3v (single-ended) v ol output low voltage 1355 1480 1605 1355 1480 1605 1355 1480 1605 mv v cc = 3.3v v oh output high voltage 2155 2280 2405 2155 2280 2405 2155 2280 2405 mv v cc = 3.3v v ihcmr input high voltage 1.2 v cc 1.2 v cc 1.2 v cc v common mode range (2) (100kep) lvpecl dc electrical characteristics (1) v cc = 3.3v 10%, v ee = 0v notes: 1. 100kep circuits are designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. input and output parameters vary 1:1 with v cc . output load is 50 to v cc C2v. 2. the v ihcmr range is referenced to the most positive side of the differential input signal. t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v il input low voltage 3055 3375 3055 3375 3055 3375 mv v cc = 5.0v (single-ended) v ih input high voltage 3775 4120 3775 4120 3775 4120 mv v cc = 5.0v (single-ended) v ol output low voltage 3055 3180 3305 3055 3180 3305 3055 3180 3305 mv v cc = 5.0v v oh output high voltage 3855 3980 4105 3855 3980 4105 3855 3980 4105 mv v cc = 5.0v v ihcmr input high voltage (2) 1.2 v cc 1.2 v cc 1.2 v cc v common mode range (100kep) pecl dc electrical characteristics (1) v cc = 5.0v 10%, v ee = 0v notes: 1. 100kep circuits are designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. input and output parameters vary 1:1 with v cc . output load is 50 to v cc C2v. 2. the v ihcmr range is referenced to the most positive side of the differential input signal. downloaded from: http:///
5 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v il input low voltage C 1945 C 1625 C 1945 C 1625 C 1945 C 1625 mv (single-ended) v ih input high voltage C 1225 C 880 C 1225 C 880 C 1225 C 880 mv (single-ended) v ol output low voltage C 1945 C 1820 C 1695 C 1945 C 1820 C 1695 C 1945 C 1820 C 1695 mv 50 to v cc C 2v v oh output high voltage C 1145 C 1020 C 895 C 1145 C 1020 C 895 C 1145 C 1020 C 895 mv 50 to v cc C 2v v ihcmr input high voltage v ee +1.2 0.0 v ee +1.2 0.0 v ee +1.2 0.0 v common mode range (2) (100kep) lvecl dc electrical characteristics (1) v cc = 0v, v ee = C 2.375v to C3.63v notes: 1. 100kep circuits are designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. 2. the v ihcmr range is referenced to the most positive side of the differential input signal. (100kep) ecl dc electrical characteristics (1) v cc = 0v, v ee = C 4.5v to C5.5v notes: 1. 100kep circuits are designed to meet the dc specifications shown in the above table after thermal equilibrium has been established. the circuit is in a test socket or mounted on a printed circuit board and traverse airflow greater than 500lfpm is maintained. 2. the v ihcmr range is referenced to the most positive side of the differential input signal. t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit condition v il input low voltage C 1945 C 1625 C 1945 C 1625 C 1945 C 1625 mv (single-ended) v ih input high voltage C 1225 C 880 C 1225 C 880 C 1225 C 880 mv (single-ended) v ol output low voltage C 1945 C 1820 C 1695 C 1945 C 1820 C 1695 C 1945 C 1820 C 1695 mv 50 to v cc C 2v v oh output high voltage C 1145 C 1020 C 895 C 1145 C 1020 C 895 C 1145 C 1020 C 895 mv 50 to v cc C 2v v ihcmr input high voltage v ee +1.2 0.0 v ee +1.2 0.0 v ee +1.2 0.0 v common mode range (2) t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit v ih input high voltage 1200 1200 1200 mv v il input low voltage 400 400 400 mv hstl input dc electrical characteristics v cc = 2.375v to 3.63v, v ee = 0v downloaded from: http:///
6 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 t a = C40 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit f max (1) maximum frequency 2.5 2.5 2.5 ghz t pd propagation delay to outputlvpecl/lvecl diff. in (150mv) 375 ps diff. in (800mv) 300 350 450 300 350 450 300 350 450 ps single-ended in 375 ps pecl/ecl diff. in (150mv) 375 ps diff. in (800mv) 275 350 425 275 350 425 275 350 425 ps single-ended in 355 ps hstl 325 500 300 450 300 450 ps t skew (2) within-device skew (diff.) 15 25 15 25 15 25 ps part-to-part skew (diff.) 100 150 100 150 100 150 ps t sw select to valid output 450 400 450 450 ps switchover time t s (3) set-up time /en to clk 100 0 100 0 100 0 ps t h (3) hold time /en to clk 200 50 200 50 200 50 ps t jitter cycle-to-cycle (4) 0.2 1 0.2 1 0.2 1 ps rms total jitter (622mhz clock) (5) <15 <15 <15 ps pp v id input voltage swing 150 800 1200 150 800 1200 150 800 1200 mv t r , t f output rise/fall times 75 225 75 130 225 85 225 ps (20% to 80%) ac electrical characteristics lvpecl: v cc = 2.375v to 3.63v, v ee = 0v; pecl: v cc = 4.50v to 5.50v, v ee = 0v lvecl: v cc = 0v, v ee = C 2.375v to C 3.63v; ecl: v cc = 0v, v ee = C 4.50v to C5.5v notes: 1. f max is defined as the maximum toggle frequency. measured with 750mv input signal, 50% duty cycle, output swing 400mv (diff), all loading with 50 to v cc C2v. 2. skew is measured between outputs under identical transitions. 3. set-up and hold times apply to synchronous applications that intend to enable/disable before the next cycle. for asynchronous applications, set-up and hold time does not apply. 4. cycle-to-cycle jitter definition: the variation in period between adjacent cycles over a random sample of adjacent cycle pair s. t jitter_cc =t n Ct n+1 where t is the time between rising edges of the output signal. 5. total jitter definition: with an ideal clock input applied to one channel of the mux, no more than one output edge in 10 12 output edges will deviate by more than the specified peak-to-peak jitter value. downloaded from: http:///
7 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 typical operating characteristics 0 100 200 300 400 500 600 700 800 900 0 500 1000 1500 2000 2500 output swing (mv diff.) frequency (mhz) output swing vs. frequency t a = 25 c v cc = 3.3v v in = 800mv 300 325 350 375 400 425 450 475 500 -40 -20 0 20 40 60 80 100 propagation delay (ps) temperature ( c) propagation delay vs. temperature t a = 25 c v cc = 3.3v v in = 800mv 300 325 350 375 400 425 450 475 500 100 200 300 400 500 600 700 800 propagation delay (ps) differential input voltage (vdiff, mv) propagation delay vs. differential input voltage (vdiff) t a = 25 c v cc = 3.3v 0 5 10 15 20 25 30 -40 -20 0 20 40 60 80 100 t skew (ps) temperature ( c) t skew vs. temperature t a = 25 c v cc = 3.3v v in = 800mv v cc = 3.3v, v ee = gnd, t a = 25 c, unless otherwise stated. downloaded from: http:///
8 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 125mhz output time (178ps/div.) output swing (200mv/div.) t a = 25 c v cc = 3.3v v ee gnd v in = 800mv /q q functional characteristics 1.5ghz output time (96ps/div.) output swing (200mv/div.) t a = 25 c v cc = 3.3v v ee gnd v in = 800mv /q q 2.5ghz output time (72ps/div.) output swing (200mv/div.) t a = 25 c v cc = 3.3v v ee gnd v in = 800mv /q q downloaded from: http:///
9 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 termination recommendations r282 r282 z o = 50 z o = 50 +3.3v +3.3v v t = v cc 2v r1130 r1130 +3.3v figure 1. parallel terminationCthevenin equivalent notes: 1. for +2.5v systems: r1 = 250 r2 = 62.5 2. for +5.0v systems: r1 = 82 r2 = 130 z = 50 z = 50 50 50 50 +3.3v +3.3v source destination r b (optional)c1 0.01 f figure 2. three-resistor yCtermination notes: 1. power-saving alternative to thevenin termination. 2. place termination resistors as close to destination inputs as possible. 3. r b resistor sets the dc bias voltage, equal to v t . for +3.3v systems r b = 46 to 50 . for +5v systems, r b = 110 . 4. c1 is an optional bypass capacitor intended to compensate for any tr/tf mismatches. +3.3v +3.3v z o = 50 r282 +3.3v +3.3v r1130 r1130 r282 v t = v cc 2v q /q r31k r41.6k v t = v cc 1.3v figure 3. terminating unused i/o notes: 1. unused output (/q) must be terminated to balance the output. 2. for +2.5v systems: r1 = 250 , r2 = 62.5 , r3 = 1.25k , r4 = 1.2k . downloaded from: http:///
10 precision edge ? sy89830u micrel, inc.m9999-110705 hbwhelp@micrel.com or (408) 955-1690 16 lead tssop (k4-16-1) rev. 01 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 data sheet is believed to be accurate and reliable. however, no responsibility is assumed 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 malfunction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intended 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 injury to the user. a purchaser s use or sale of micrel products for use in life support appliances, devices or systems is at purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel, incorporated. downloaded from: http:///
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