sy88932l 3.3v, 4.25gbps sonet/sdh laser driver with output disable micrel inc. ? 2180 fortune drive ? san jose, ca 95131 ? usa ? tel +1 ( 408 ) 944 - 0800 ? fax + 1 (408) 474 - 1000 ? http://www.micrel.com february 2008 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 general description the sy88932l is the smallest available laser driver with a programmable modulation current up to 60ma for fabry - perot (fp) or distribution feedback (dfb) lasers. the device is suitable for soent/sdh applications with data rates up to 4.25gbps. the sy88932l accepts either cml level or ac - coupled pecl inputs, and incorporates an active low ttl /en function which shuts off the modulation current when high. datasheets and support documentation can be found on micrel?s web site at www.micre l.com. features ? up to 4.25gbps operation ? modulation current to 60ma ? rise/fall times 65ps typical ? input 50 ? internally terminated to vcc ? ttl /en with internal 75k ? pull - down ? designed for use with mic3000 optical transceiver management ic ? voltage programmab le laser modulation current ? single 3.3v power supply ? operating temperature range of ? 40c to +85c ? available in tiny 16 - pin qfn package applications ? fiber optical module ? transponder ? xaui cwdm ? sonet/ sdh transmission system ? add - drop mux ? metro area network ? 4 .25gbps optical transmitter ___________________________________________________________________________________________________________ block diagram
micrel, inc. sy8 8932l february 2008 2 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 ordering information part number package type operating range package marking lead finish sy88932l mi qfn -16 industrial 932l sn -pb sy88932lmitr (1) qfn -16 industrial 932l sn -pb sy88932lmg qfn -16 industrial 932l with pb - free bar - line indicator pb - free nipdau sy88932lmgtr (1) qfn -16 industrial 932l with pb - free bar - line indicator pb - free nipdau note: 1. tape and reel. pin configuration 16- pin qfn
micrel, inc. sy8 8932l february 2008 3 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 pin description pin number pin name pin function 2, 3 din, /din nrz differential data (inputs), cml terminated interface with 50 ? to v cc . 1, 4, 7, 8, 13 gnd ground. 5, 6 vcc positive power supply. 9, 10, 11, 12 out, /out open collector (outputs) from the modulation driver. 14 vref voltage reference, nominally 1.25v with respect to ground. 15 vcntrl voltage control of i mod . 5k ? input impedance. see ?typical operating characteristics.? 16 /en enable: ttl - compatible active low input with 75k ? pull - down resistor. truth table (1,2) d /d /en out (3) /out l h l h l h l l l h x x h h l notes: 1. truth table parameters are give n for voltage rather than optical outputs. hence, a voltage high and out means no modulation current is flowing through out, and a voltage low on out means modulation current is flowing through out. a voltage low implies an optic al high, and vice versa. 2. l = low, h = high, x = don?t care. 3. i out i mod_off when /en is high.
micrel, inc. sy8 8932l february 2008 4 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 absolute maximum ratings (1) supply voltage (v cc ) .................................... ? 0.5v to +4.0v cml input voltage (v in ) ..................v cc ? 1.0v to v cc +0.5v ttl control input voltage (v in ) ............................. 0v to v cc lead temperature (soldering, 20sec.) ....................... 265c storage temperature (t s ) ......................... ? 65 c to +150c operating ratings (2) supply voltage (v cc ) .................................... +3.0v to +3.6v ambient temperature (t a ) .......................... ? 40c to +85c junction temperature (t j ) ........................ ? 40c to +120c junction thermal resistance (3) qfn ( ja ) still - air ....................................................... 61c/w ( jb ) still - air ....................................................... 38c/w dc electrical charac teristics v cc = 3.0v to 3.6v; gnd = 0v; t a = ? 40c to +85c, typical values at v cc = 3.3v, t a = 25c. symbol parameter condition min typ max units i cc power supply current note 4 57 80 ma i mod modulation current range 10 60 ma i mod_off modulation off current /en = v ihen 200 a v ir cml input voltage range v cc ? 0.8 v cc +0.4 v v id cml input differential voltage (d in , /d in ) note 5 400 800 1600 mv pp v ihen ttl input high voltage (/en) 2.0 v v ilen ttl input low voltage (/en) 0.8 v v out voltage ( out, /out) note 6 v cc ? 1.5 v cc v v ref reference voltage note 7 1.2 1.25 1.3 v notes: 1. permanent device damage may occur is absolute maximum ratings are exceeded. this is a stress rating only and functional opera tion is not implied at conditions other t han those detailed in the operational sections of this datasheet. exposed to absolute maximum ratings conditions for extended periods may affect device reliability. 2. the device is not guaranteed to function outside its operating rating. 3. thermal resist ance numbers are 4 - layer pcb. thermal performance assumes exposed pad is soldered (or equivalent) to the same potential as the ground pins on the pcb. 4. excluding i mod . i mod set to 60ma with 25 ? load to v cc on out, /out. inputs floating. 5. v id is the volta ge required to guarantee a stable logic level. for logic ?1?, d in must be v id /2 above /d in . for stable logic ?0?, d in must be v id /2 below /d in . 6. out and /out are current outputs. this specification defines the voltage range that the user must guarantee thes e pins remain within for proper operation. 7. v ref intended to source/sink |5ma|.
micrel, inc. sy8 8932l february 2008 5 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 ac electrical characteristics (8) v cc = 3.0v to 3.6v; gnd = 0v; t a = ? 40c to +85c, typical values at v cc = 3.3v, t a = 25c. symbol parameter condition min typ max units t r, t f output rise/fall times (20% to 80%) note 9 65 100 ps dj determin istic jitter note 9, 10 20 ps pp notes: 8. ac characteristics are guaranteed by design and characterization. 9. i mod = 60ma. 10. deterministic jitter measured using k28.5 pattern of 2.486gbps, v id = 1600mv pp . typical operating characteristics
micrel, inc. sy8 8932l february 2008 6 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 packag e information 16- pin qfn
micrel, inc. sy8 8932l february 2008 7 m9999 - 022008-f hbwhelp@micrel.com or (408) 955 - 1690 pcb thermal consideration for 16 - pin qfn package package notes: 1. package meets level 2 qualifications. 2. all parts are dry - packaged before shipment. 3. exposed pads must be soldered to a ground for proper thermal management. 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 data sheet is believed to be accurate and reliable. however, no res ponsibility is assumed 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 appliance s, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, an d whose failure to perform can be reasonably expected to result in a significant injury to the user. a purchaser?s use or sale of micrel products for use in life support appliances, devices or systems is a purchaser?s own risk a nd purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2008 micrel, incorporated.
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