description 3.3v and 5v power supply options 500ps propagation delay fully differential design supports both standard and low voltage operation available in 20-pin soic package the SY100EL90V is a triple ecl/lvecl-to-pecl/ lvpecl translator. the device can translate over all combinations of supply voltages: -5v ecl to 5v pecl, -5v ecl to 3.3v lvpecl, -3.3v lvecl to 5v pecl or -3.3v lvecl to 3.3v lvpecl. a v bb output is provided for interfacing with single ended ecl signals at the input. if a single ended input is to be used, the v bb output should be connected to the d input. the active signal would then drive the d input. when used, the v bb output should be bypassed to via a 0.01 f capacitor. the v bb output is designed to act as the switching reference for the el90v under single ended input switching conditions. as a result this pin can only source/sink up to 0.5ma of current. to accomplish the level translation the el90v requires three power rails. the v cc supply should be connected to the positive supply, and the v ee pin should be connected to the negative power supply. the gnd pins as expected are connected to the system ground plane. both v ee and v cc should be bypassed to ground via 0.01 f capacitors. under open input conditions, the d input will be biased at v cc /2 and the d input will be pulled to v ee . this condition will force the q output to a low, ensuring stability. features 5v/3.3v triple ecl/lvecl-to- pecl/lvpecl translator pin configuration/block diagram soic top view pin function dn ecl/lvecl inputs q n pecl/lvpecl outputs v bb ecl/lvecl reference voltage output SY100EL90V final rev.: f amendment: /1 isse date: october, 1998 pin names d 2 v cc gnd gnd v cc v cc v bb d 2 d 1 d 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 v b b v ee q 0 q 0 q 1 q 2 q 1 q 2 pecl ecl pecl ecl pecl ecl d 1 d 0 function table function v cc gnd v ee ?v ecl to 5v pecl 5v 0v ?v ?v ecl to 3.3v lvpecl 3.3v 0v ?v ?.3v lvecl to 5v pecl 5v 0v ?.3v ?.3v lvecl to 3.3v lvpecl 3.3v 0v ?.3v 1
2 SY100EL90V micrel ecl/lvecl input dc electrical characteristics lvpecl output dc electrical characteristics 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 v oh output high voltage (1) 2.215 2.420 2.275 2.420 2.275 2.350 2.420 2.275 2.420 v v ol output low voltage (1) 1.470 1.745 1.490 1.680 1.490 1.600 1.680 1.490 1.680 v i cc power supply current 24 24 20 24 26 ma note: 1. these levels are for v cc = 3.3v. level specifications will vary 1:1 with v cc . pecl output dc electrical characteristics 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 v oh output high voltage (1) 3.915 4.120 3.975 4.120 3.975 4.050 4.120 3.975 4.120 v v ol output low voltage (1) 3.170 3.445 3.190 3.380 3.190 3.300 3.380 3.190 3.380 v i cc power supply current 24 24 20 24 26 ma note: 1. these values are for v cc = 5v. level specifications will vary 1:1 with v cc. t a = ?0 c t a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. min. typ. max. unit 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 ee power supply current 8 8 8 8 ma i ih input high current 150 150 150 150 a i il input low current dn 0.5 0.5 0.5 0.5 a dn ?00 ?00 ?00 ?00 v bb output reference ?.38 ?.26 ?.38 ?.26 ?.38 ?.26 ?.38 ?.26 v v pp minimum peak-to-peak 150 150 150 150 mv input ecl: v ee = ?.2v to ?.5v; lvecl: v ee = ?.0v to ?.8v v cc = +3.0v to +3.8v v cc = +4.2v to +5.5v
3 SY100EL90V micrel 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 t plh propagation delay diff. 390 590 410 610 420 620 460 660 ps t phl d to q s.e. 340 640 360 660 370 670 410 710 t skew within-device skew (1) output-to-output 20 100 20 100 20 100 20 100 ps part-to-part (diff.) 200 200 200 200 duty cycle (diff.) 25 25 25 25 v pp minimum input swing (2) 150 150 150 150 mv v cmr common mode range (3) ?.4 ?.4 ?.4 ?.4 v t r output rise/fall times q 230 500 230 500 230 500 230 500 ps t f (20% to 80%) ac electrical characteristics product ordering code ordering package operating code type range SY100EL90Vzc z20-1 commercial SY100EL90Vzctr z20-1 commercial notes: 1. skew is measured between outputs under identical transitions. 2. minimum input swing for which ac parameters are guaranteed. the device will function reliably with differential inputs down to 100mv. 3. 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. v cmr min. depends on v ee , v pp and temperature at v pp <500mv and ?0?c, v cmr is v ee +1.3v; and for 0?5?c, v cmr is v ee +1.2v. at v pp 500mv and ?0?c, v cmr is v ee +1.5v; and for 0?5?c, v cmr is v ee +1.4v. ecl: v ee = ?.2v to ?.5v; lvecl: v ee = ?.0v to ?.8v; pecl: v cc = +4.2v to +5.5v; lvpecl: v cc = +3.0v to +3.8v
4 SY100EL90V micrel 20 lead soic .300" wide (z20-1) rev. 03 micrel-synergy 3250 scott boulevard santa clara ca 95054 usa tel + 1 (408) 980-9191 fax + 1 (408) 914-7878 web http://www.micrel.com this information is believed to be accurate and reliable, however no responsibility is assumed by micrel for its use nor for an y infringement of patents or other rights of third parties resulting from its use. no license is granted by implication or otherwise under any patent or pat ent right of micrel inc. ? 2000 micrel incorporated
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