1 precision edge sy10elt21l sy100elt21l micrel, inc. m9999-031506 hbwhelp@micrel.com or (408) 955-1690 pin function q ttl output d, /d differential lvpecl inputs v cc +3.3v supply v bb reference output gnd ground description 3.3v power supply 2.0ns typical propagation delay low power differential lvpecl inputs 24ma ttl outputs flow-through pinouts available in 8-pin soic package the sy10/100elt21l are single differential lvpecl- to-lvttl translators using a single +3.3v power supply. because lvpecl (low voltage positive ecl) levels are used, only +3.3v and ground are required. the small outline 8-lead soic package and low skew single gate design make the elt21l ideal for applications that require the translation of a clock or data signal where minimal space, low power, and low cost are critical. v bb allows a differential, single-ended, or ac-coupled interface to the device. if used, the v bb output should be bypassed to v cc with 0.01 f capacitor. under open input conditions, the /d will be biased at a v cc /2 voltage level and the d input will be pulled to ground. this condition will force the q output low to provide added stability. the elt21l is available in both ecl standards: the 10elt is compatible with positive ecl 10h logic levels, while the 100elt is compatible with positive ecl 100k logic levels. features 3.3v differential lvpecl-to-lvttl translator pin names precision edge sy10elt21l sy100elt21l rev.: d amendment: /0 issue date: march 2006 precision edge is a registered trademark of micrel, inc. precision edge
2 precision edge sy10elt21l sy100elt21l micrel, inc. m9999-031506 hbwhelp@micrel.com or (408) 955-1690 1 nc d d v bb 8v cc q nc gnd 7 6 5 2 3 4 pecl ttl package/ordering information ordering information (1) package operating package lead part number type range marking finish sy10elt21lzc z8-1 commercial hel21l sn-pb sy10elt21lzctr (2) z8-1 commercial hel21l sn-pb sy100elt21lzc z8-1 commercial xel21l sn-pb sy100elt21lzctr (2) z8-1 commercial xel21l sn-pb sy10elt21lzi z8-1 industrial hel21l sn-pb sy10elt21lzitr (2) z8-1 industrial hel21l sn-pb sy100elt21lzi z8-1 industrial xel21l sn-pb SY100ELT21LZITR (2) z8-1 industrial xel21l sn-pb sy10elt21lzg (3) z8-1 industrial hel21l with pb-free pb-free bar-line indicator nipdau sy10elt21lzgtr (2, 3) z8-1 industrial hel21l with pb-free pb-free bar-line indicator nipdau sy100elt21lzg (3) z8-1 industrial xel21l with pb-free pb-free bar-line indicator nipdau sy100elt21lzg ( tr (2, 3) z8-1 industrial xel21l with pb-free pb-free bar-line indicator nipdau 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. 8-pin soic (z8-1)
3 precision edge sy10elt21l sy100elt21l micrel, inc. m9999-031506 hbwhelp@micrel.com or (408) 955-1690 truth table d/d q lh l hl h open open l symbol paramter value unit v cc power supply voltage ?.5 to +3.8 v v i pecl input voltage 0v to v cc +0.5 v v o voltage applied to ?.5 to v cc v output at high state i o current applied to twice the ma output at low state rated i ol t lead lead temperature +260 c (soldering, 20sec.) t store storage temperature ?5 to +150 c t a operating temperature ?0 to +85 c 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 = 40 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. max. min. max. min. typ. max. min. max. unit condition i os output short circuit current ?0 ?75 ?0 ?75 ?0 ?75 ?0 ?75 ma v out = 0v i cc power supply current 20 20 14 20 20 ma v oh output high voltage 2.0 2.0 2.0 2.0 v i oh = ?.0ma v ol output low voltage 0.5 0.5 0.5 0.5 v i ol = 24ma ttl dc electrical characteristics v cc = +3.3v 5% t a = 40 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. max. min. max. min. typ. max. min. max. unit condition i ih input high current 150 150 150 150 a i il input low current d 0.5 0.5 0.5 0.5 a /d ?00 ?00 ?00 ?00 v ih input high voltage (2) 10elt 2070 2410 2130 2460 2170 2490 2240 2580 mv 100elt 2135 2420 2135 2420 2135 2420 2135 2420 v il input low voltage (2) 10elt 1350 1800 1350 1820 1350 1820 1350 1855 mv 100elt 1490 1825 1490 1825 1490 1825 1490 1825 v bb reference output (2) 10elt 1870 2000 1920 2030 1950 2000 2050 1990 2110 mv 100elt 1920 2040 1920 2040 1920 1980 2040 1920 2040 pecl dc electrical characteristics v cc = +3.3v 5% notes: 1. these values are for v cc = 3.3v. level specifications will vary 1:1 v cc .
4 precision edge sy10elt21l sy100elt21l micrel, inc. m9999-031506 hbwhelp@micrel.com or (408) 955-1690 notes: 1. part-to-part skew considering high-to-high transitions at common v cc level. 2. these parameters are guaranteed but not tested. 3. frequency at which output levels will meet a 0.8v to 2.0v minimum swing. 4. the f max value is specified as the minimum guaranteed maximum frequency. actual operational maximum frequency may be greater. 5. 100mv input guarantees full logic at output. t a = 40 ct a = 0 ct a = +25 ct a = +85 c symbol parameter min. max. min. max. min. typ. max. min. max. unit condition t plh propagation delay 1.5 2.5 1.5 2.5 1.5 2.0 2.5 1.5 2.5 ns c l = 20pf t phl t skpp part-to-part skew (1,2) 0.5 0.5 0.5 0.5 ns c l = 20pf f max maximum input frequency (2,3,4) 275 275 275 275 mhz c l = 20pf v cmr common mode range 1.2 v cc 1.2 v cc 1.2 v cc 1.2 v cc v v pp minimum peak-to-peak input (5) 100 100 100 100 mv t r output rise/fall time 0.5 1.0 0.5 1.0 0.5 1.0 0.5 1.0 ns c l = 20pf t f (1.0v to 2.0v) ac electrical characteristics v cc = +3.3v 5%
5 precision edge sy10elt21l sy100elt21l micrel, inc. m9999-031506 hbwhelp@micrel.com or (408) 955-1690 8-pin soic .150" wide (z8-1) rev. 03 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 datasheet is believed to be accurate and reliable. however, no responsibility is as sumed 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 malfu nction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intend ed 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 inj ury to the user. a purchaser s use or sale of micrel products for use in life support appliances, devices or systems is at purchaser s own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2006 micrel, incorporated.
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