description up to 1.25gbps operation 25ma peak drive current adjustable output current separate output enable differential inputs for data 75k ? input pull-down resistor single power supply available in a tiny 10-pin (3mm) msop the SY100ELT982 is a high speed pecl-to-cml translator. the output current is dc current controlled by i rset , current through the resistor r set . the output out is low when output enable is high. the device incorporates complementary open collector outputs with a capability of driving peak current of 25ma. the SY100ELT982 utilizes the high performance bipolar asset technology. features pecl-to-cml translator w/o enable pin configurations block diagram SY100ELT982 final telecommunications cml output oscillator gaas interface applications d in v cc r term out d in output current control internal logic bias control en i out v ref 40x r set v ee v cc gnd r set out 6 5 10 9 8 7 1 2 3 4 msop k10-1 /en d in /d in v ref v cc /out out gnd gnd r set 1 rev.: b amendment: /0 issue date: march 2002
2 SY100ELT982 micrel pin function v cc most positive power supply input, +5v for pecl operation. gnd ground d in , /d in differential pecl 100k compatible inputs. /en this pecl 100k compatible input enables data translation. when enable asserted high, out = i out , /out = 0ma. out, /out open collector outputs from the output buffer drive these differential current outputs. v ref voltage reference for use with r set. r set external resistor to adjust output current. d /d /en out (2) /out (3) lhllh hllhl xxhlh note: 1. l = low, h = high, x = don't care 2. h = i out = 0ma 3. h = /i out = 0ma pin names truth table (1) symbol rating value unit v cc power supply voltage 0 to +7.0 v v i input voltage 0 to +6.0 v i o output current 25 ma t a operating temperature range 0 ? c to +85 ? c ? c t store storage temperature range 55 ? c to +125 ? c ? c p tot power dissipation 250 mw absolute maximum ratings (1) note: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional oper ation is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum ratlng co nditions for extended periods may affect device reliability. symbol rating value unit v cc power supply voltage +4.5 to +5.5 v r term resistor to terminate outputs 10 to 50 ? r set resistor to adjust current 1500 to 50,000 ? ja thermal resistance of package to ambient (2) 206 ? c/w c out capacitance on out + /out 2.5 typical pf operationing conditions (1) notes: 1. the voltage drop across r term should not be greater than 2v. 2. still air without heatsink.
3 SY100ELT982 micrel t a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit v ih input high voltage v cc - 1165 v cc - 880 v cc - 1165 v cc - 880 v cc - 1165 v cc - 880 mv (din, /din, /en) v il input low voltage v cc - 1810 v cc - 1475 v cc - 1810 v cc - 1475 v cc - 1810 v cc - 1475 mv (din, /din, /en) v ref reference voltage 3.12 3.00 2.80 v i il input low current (1) 0.5 0.5 0.5 ua (din, /din, /en) i ih input high current 100 100 100 ua (din, /din, /en) i cc supply current (2) 16 25 16 25 16 25 ma i ol output low current 500 500 500 ua (/en = high) i or output current 10 10 10 % ringing (2) i gain i out /i rset 30 38 44 30 38 44 30 38 44 notes: 1. v i = v il (min.) 2. i oh = 25ma. dc electrical characteristics gnd = 0v; v cc = +5.0v 10%; t a = 0 c to + 85 c t a = 0 ct a = +25 ct a = +85 c symbol parameter min. typ. max. min. typ. max. min. typ. max. unit conditions t pd d propagation delay 480 1000 480 1000 480 1000 ps din - out t pd en propagation delay 450 1000 450 1000 450 1000 ps /en - out t r rise/fall time 200 200 200 ps t f (20% to 80%) i out output current 5 15 25 5 15 25 5 15 25 ma i rset output current control 0.125 0.625 0.125 0.625 0.125 0.625 ma i or output current 10 10 10 % ringing (2) ac electrical characteristics (1) i oh =10ma; gnd = 0v; v cc = +5v 10%; t a = 0 c to + 85 c notes: 1. rterm = 50 ? 1% 2. i oh = 5 to 25ma
4 SY100ELT982 micrel application example performance curves product ordering code ordering package operating package code type range marking SY100ELT982kc k10-1 commercial 982 SY100ELT982ki k10-1 industrial 982 10 20 25 30 i o (ma) i o and r set 0.0 0.0 15 5 4.0k 6.0k 8.0k 10k 2.0k r set (ohm) 12k v cc 50 d in d in 50 50 50 coaxil SY100ELT982 en v ret r set 50 coaxil logic low to enable 1.5k typical cml input device ex. el16v
5 SY100ELT982 micrel 10 lead msop (k10-1) rev. 00 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. ? 2002 micrel incorporated
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