1 sy88822v micrel, inc. m9999-081406 hbwhelp@micrel.com or (408) 955-1690 description single 3.3v or 5v power supply up to 155mbps operation modulation current to 30ma pecl output enable differential pecl inputs available in a tiny 10-pin (3mm) msop features 5v/3.3v 155mbps laser diode driver with output enable sy88822v applications 155mbps sonet rev.: c amendment: /0 issue date: august 2006 the sy88822v is a high speed current switch for driving a semiconductor laser diode in optical transmission applications. the modulation current (i out ) is controlled by the current (i rset ) through the external resistor r set . the output out is high and no current flows through out when output enable is high. the device incorporates complementary open collector outputs with a 30ma maximum current driving capability. the external resistor r ext must be placed between /out and v cc to dissipate the worst case power. r ser is recommended to compensate for laser diode matching issues. pin 9 and pin 10 should be connected to achieve better performance. the sy88822v utilizes the high performance bipolar asset? technology. asset is a trademark of micrel, inc. functional block diagram
2 sy88822v micrel, inc. m9999-081406 hbwhelp@micrel.com or (408) 955-1690 pin number pin name pin function 1 /en 100k pecl compatible input w/ 75k ? pulldown resistor. modulation current goes to zero when deasserted high. 2, 3 din, /din differential 100k pecl compatible input w/ 75k ? pulldown resistors. 4 vref voltage reference for use with r set . 5 rset an external resistor from here to v ref sets the reference current for i out . 6 vcc positive power supply. 7 gnd device ground. 8, 9, 10 /out, out differential open collector current outputs. pin description d/d /en out (note 2) /out lhlhl h lllh xxhhl notes: 1. l = low, h = high, x = don't care. 2. h = i out = 0ma. truth table (1) rset vcc 6 5 1 /en din /din vref 10 out out /out gnd 9 8 7 2 3 4 10-pin msop (k10-1) package/ordering information ordering information package operating package lead part number type range marking finish sy88822vkc k10-1 commercial 822v sn-pb sy88822vkctr (1) k10-1 commercial 822v sn-pb SY88822VKG k10-1 industrial 822v with pb-free pb-free bar-line indicator nipdau SY88822VKGtr (1) k10-1 industrial 822v with pb-free pb-free bar-line indicator nipdau note: 1. tape and reel.
3 sy88822v micrel, inc. m9999-081406 hbwhelp@micrel.com or (408) 955-1690 absolute maximum ratings (1) power supply voltage (v cc ) ............................ 0v to +7.0v input voltage (v in ) .............................................. 0v to v cc output current (i out ) ................................................. 30ma power dissipation (p d ) ........................................... 250mw lead temperature (soldering, 20 sec.) ................... +260 c storage temperature range (t s ) ............ C55 c to +125 c maximum operating junction temperature ............ +125 c operating ratings (2) supply voltage (v in ) ................................... +3.0v to +3.6v ........................................................ or +4.5v to +5.5v ambient temperature (t a ) ......................... C40 c to +85 c resistor to dissipate power (r ext ) .................. 10 ? to 50 ? laser diode serial resistor (r ser ) .................... 0 ? to 50 ? resistor to adjust current (r set ), note 4 ......................................................... 700 ? to 20,000 ? package thermal resistance (3) msop ( ja ) still-air ...................................................... 113 c/w ( jb ) still-air ........................................................ 74 c/w gnd = 0v; v cc = 3.3v 10% or v cc = 5.0v 10%; t a = C40 c to +85 c symbol parameter condition min typ max units v ih input high voltage v cc C1.165 v cc C0.880 v (d in , /d in , /en) v il input low voltage v cc C1.810 v cc C1.475 v (d in , /d in , /en) v ref reference voltage 1.7 2.0 2.3 v i il input low current note 5 0.5 a (d in , /d in , /en) i ih input high current 100 a (d in , /d in , /en) i cc supply current note 6 25 ma i out_off output low current 450 1000 a (/en = high) i out modulation current 30 ma a rset i out /i rset 30 38 44 notes: 1. permanent device damage may occur if absolute maximum ratings are exceeded. this is a stress rating only and functional opera tion is not implied at conditions other than those detailed in the operational sections of this data sheet. exposure to absolute maximum ratlng con ditions for extended periods may affect device reliability. 2. the voltage drop across r ext and r ser plus laser diode must not be greater than 1.0v. 3. still-air without heatsink. 4. r set minimum 430 ? . 5. v in = v il (min.). 6. i mod = 25ma. dc electrical characteristics
4 sy88822v micrel, inc. m9999-081406 hbwhelp@micrel.com or (408) 955-1690 i mod =10ma; gnd = 0v; v cc = 3.3v 10% or v cc = 5.0v 10%; t a = C40 c to +85 c symbol parameter condition min typ max units t phl , t plh d propagation delay i out = 10ma 1000 ps d in C out t phl , t plh en propagation delay i out = 10ma 1000 ps /en C out t r , t f rise/fall time 1000 ps (20% to 80%) i or output current ringing i out = 5 to 30ma 10 % notes: 8. specification for packaged product only. 9. r ext = r ser = 25 ? 1%; r ser connected directly to v cc . ac electrical characteristics (8, 9) typical operating characteristics 0 10 20 30 40 0.0 1.0 2.0 3.0 4.0 5.0 i mod (ma) rset (k ? ) i mod vs. r set v cc = 3.3v v cc = 5.0v
5 sy88822v micrel, inc. m9999-081406 hbwhelp@micrel.com or (408) 955-1690 10-pin msop (k10-1) rev. 00 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 purchasers use or sale of micrel products for use in life support appliances, devices or systems is at purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2005 micrel, incorporated.
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