description 3.3v power supply 620ps propagation delay fully differential design supports low voltage operation available in 20-pin soic package the SY100EL91L is a triple lvpecl-to-ecl or lvpecl-to-lvecl translator. a v bb output is provided for interfacing with single ended pecl 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 ground via a 0.01 f capacitor. the v bb output is designed to act as the switching reference for the el91l 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 el91l 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 gnd. this condition will force the q output to a low, ensuring stability. features 3.3v triple lvpecl-to-ecl or lvpecl-to-lvecl translator pin configuration/block diagram soic top view pin function dn pecl inputs q n ecl outputs pecl_v bb pecl reference voltage output SY100EL91L final rev.: f amendment: /2 issue date: november, 1999 pin names v cc gnd gnd v cc v cc pecl_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 pecl_v b b d 2 v ee q 0 q 0 q 1 q 2 q 1 q 2 ecl pecl d 1 d 0 ecl pecl ecl pecl function vcc v ee lvpecl-to-ecl 3.3v ?.0v lvpecl-to-lvecl 3.3v ?.3v function table 1
2 SY100EL91L micrel 3.3v lvpecl input dc electrical characteristics (1) ecl/lvecl output dc electrical characteristics (1) 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 cc power supply voltage 3.0 3.8 3.0 3.8 3.0 3.3 3.8 3.0 3.8 v v ih input high voltage (2) 2.135 2.420 2.135 2.420 2.135 2.350 2.420 2.135 2.420 v v il input low voltage (2) 1.490 1.825 1.490 1.825 1.490 1.825 1.490 1.825 v 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 -600 -600 -600 -600 v bb output reference (2) 1.920 2.040 1.920 2.040 1.920 2.040 1.920 2.040 v i cc power supply current 10 10 6.0 10 10 ma notes: 1. parametric values specified at: 3 volt power supply range 100el91l series -3.0v to -3.8v. 2. these levels are for v cc = 3.3v. 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 ee power supply ecl -4.2 -5.5 -4.2 -5.5 -4.2 -5.5 -4.2 -5.5 v voltage lvecl -3.0 -3.8 -3.0 -3.8 -3.0 -3.8 -3.0 -3.8 v oh output high voltage -1085 -880 -1025 -880 -1025 -955 -880 -1025 -880 mv v ol output low voltage -1830 -1555 -1810 -1620 -1810 -1705 -1620 -1810 -1620 mv i ee power supply current 28 28 22 28 30 ma note: 1. parametric values specified at: 3 volt power supply range 100el91l series -3.0v to -3.8v.
3 SY100EL91L micrel ac electrical characteristics (4) lvpecl: v cc = +3.0v to +3.8v, ecl: v ee = -4.2v to -5.5v, lvecl: v ee = -3.0v to -3.8v 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. 490 590 690 510 610 710 520 620 720 560 660 760 ps t phl d to q s.e. 440 590 740 460 610 760 470 620 770 510 660 810 t skew within-device skew (1) output-to-output 40 100 40 100 40 100 40 100 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) v v pp < 500mv 1.3 v cc ?.2 1.2 v cc ?.2 1.2 v cc ?.2 1.2 v cc ?.2 v pp > 500mv 1.5 v cc ?.2 1.4 v cc ?.2 1.4 v cc ?.2 1.4 v cc ?.2 t r output rise/fall times q 320 400 580 320 400 580 320 400 580 320 400 580 ps t f (20% to 80%) notes: 1. skew is measured between outputs under identical transitions. 2. minimum input swing for which ac parameters are guaranteed. the device has a dc gain of ~40. 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. 4. parametric values specified at: 3 volt power supply range 100el91l series -3.0v to -3.8v. product ordering code ordering package operating code type range SY100EL91Lzc z20-1 commercial SY100EL91Lzctr z20-1 commercial
4 SY100EL91L micrel lvpecl-to-ecl mode configuration 3.3v configuration 5.0v configuration v cc gnd gnd v cc v cc lvpecl_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 lvpecl_v bb d 2 v ee q 0 q 0 q 1 q 2 q 1 q 2 ecl lvpecl d 1 d 0 ecl lvpecl ecl lvpecl v cc = +3.3v v cc = +3.3v r1 125 ? r2 v ee = 0v v cc = +3.3v r1 125 ? r2 v ee = 0v r3 83 ? r4 v cc = +3.3v v ee = 0v lvpecl device r1 83 ? r2 v ee = -3.3v v cc = 0v r1 83 ? r2 v ee = -3.3v r3 125 ? r4 r3 125 ? r4 ecl device v ee = -3.3v v cc = 0v single ended mode v cc = +3.3v unused input 0.1f -3.3v r3 83 ? r4 v cc gnd gnd v cc v cc lvpecl_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 lvpecl_v bb d 2 v ee q 0 q 0 q 1 q 2 q 1 q 2 ecl lvpecl d 1 d 0 ecl lvpecl ecl lvpecl v cc = +3.3v v cc = +3.3v r1 125 ? r2 v ee = 0v v cc = +3.3v r1 125 ? r2 v ee = 0v r3 83 ? r4 v cc = +3.3v v ee = 0v lvpecl device r1 83 ? r2 v ee = -5v v cc = 0v r1 83 ? r2 v ee = -5v r3 125 ? r4 r3 125 ? r4 ecl device v ee = -5v v cc = 0v single ended mode v cc = +3.3v unused input 0.1f -5v r3 83 ? r4 notes: 1. the schematic above demonstrates three different ways that all or any inputs of SY100EL91L can be used. the three modes or o peration are: differential lvpecl, single-ended lvpecl, and/or open. 2. if d2 an d2 are used in differential mode, then the same scheme of d0 and d0 applies. if used in single-ended mode, then use the same scheme of d1 and d1.
5 SY100EL91L 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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