description 620ps typical propagation delay fully differential design supports standard operation available in 20-pin soic package the SY100EL91 is a triple pecl-to-ecl translator. it receives standard voltage pecl signals and translates them to different ecl output signals. 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 el91 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 el91 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 triple pecl-to-ecl translator pin configuration/block diagram soic top view pin function dn pecl inputs q n ecl outputs pecl_v bb pecl reference voltage output SY100EL91 final rev.: b amendment: /0 issue date: april, 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 1
2 SY100EL91 micrel pecl input 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 cc power supply voltage 4.75 5.25 4.75 5.25 4.75 5.25 4.75 5.25 v v ih input high voltage (1) 3.835 4.120 3.835 4.120 3.835 4.120 3.835 4.120 v v il input low voltage (1) 3.190 3.525 3.190 3.525 3.190 3.525 3.190 3.525 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 ?00 ?00 ?00 ?00 v bb output reference (1) 3.620 3.740 3.620 3.740 3.620 3.740 3.620 3.740 v i cc power supply current 11 11 6.0 11 11 ma ecl output dc electrical characteristics 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 ee power supply voltage ?.2 ?.5 ?.2 ?.5 ?.2 ?.5 ?.2 ?.5 v v oh output high voltage ?085 ?80 ?025 ?80 ?025 ?55 ?80 ?025 ?80 mv v ol output low voltage ?830 ?555 ?810 ?620 ?810 ?705 ?620 ?810 ?620 mv i ee power supply current 28 28 22 28 30 ma
3 SY100EL91 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. 520 620 720 520 620 720 520 620 720 550 650 750 ps t phl d to q s.e. 470 620 770 470 620 770 470 620 770 500 650 800 t skew within-device skew (1) output-to-output 100 100 20 100 100 ps part-to-part (diff.) 200 200 200 200 duty cycle (diff.) 25 25 25 25 v pp minimum input swing (2) 200 200 200 200 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%) ac electrical characteristics pecl: v cc = +4.75v to +5.25v, ecl: v ee = -4.2v to -5.5v 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. product ordering code ordering package operating code type range SY100EL91zc z20-1 commercial SY100EL91zctr z20-1 commercial
4 SY100EL91 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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