1 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 description up to 1.25gb/s operation 75ma peak drive current separate modulation control separate master reset for laser safety differential inputs for data and clock 75k ? input pulldown resistor single power supply available in 16-pin soic package the sy100el1001 is a high speed current source for driving a semiconductor laser diode in optical transmission applications. the output current modulation is dc voltage controlled. the integrated circuit contains the following functional blocks: input line receiver d flip-flop bias control circuitry output current switch a logic high level at the data input results in the modulation current flowing through the out pin on the next rising edge of the clock. a logic high level at the master reset input will disable the modulation current. the device incorporates complementary open collector outputs with a capability of driving peak current of 75 ma. the laser driver current is adjustable by selection of r set . the resistor r ext must be placed between /out and v cc to dissipate the worst case power. r ser is recommended to fix laser diode matching issues. the sy100el1001 utilizes the high performance bipolar asset technology. features laser diode driver with input d flip-flop sy100el1001 block diagram clk, clk d, d mr v cc r ext out v bb r set v ee r ser to laser diode bias control mc modulation control d flip-flop out 1 rev.: i amendment: /0 issue date: march 2006 asset is a trademark of micrel, inc.
2 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 package/ordering information ordering information (1) package operating package lead part number type range marking finish sy100el1001zc z16-2 commercial sy100el1001zc sn-pb sy100el1001zctr (2) z16-2 commercial sy100el1001zc sn-pb sy100el1001zi z16-2 industrial sy100el1001zi sn-pb sy100el1001zitr (2) z16-2 industrial sy100el1001zi sn-pb SY100EL1001ZG (3) z16-2 industrial SY100EL1001ZG with pb-free pb-free bar-line indicator nipdau SY100EL1001ZGtr (2, 3) z16-2 industrial SY100EL1001ZG 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. n c 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 cl k clk r set v cco d d mr v cc nc mc out out v bb nc v ee top view soic z16-2 16-pin narrow soic (z16-2) d /d clk /clk mr out /out lhzzzl hl hlzzzl lh xxxx h hl note: 1. l = low, h = high, z = low-to-high transition, zz = high-to-low transition, x = don't care. pin function v cc , v cco most positive power supply pins separation helps to isolate sensitive circuitry from noise generating function. +5v for pecl operation or ground for ecl operation. v ee most negative power supply input. ground for pecl operation or -5v for ecl operation. v bb this pin provides a reference voltage for use in single ended applications or when the input signal is ac coupled into the device. d,/d these differential ecl/pecl 100k compatible inputs receive nrz data. clk, /clk these differential clock inputs mr this ecl/pecl 100k compatible input resets the laser driver logic - modulation current transitions to zero when asserted high. out, /out open collector outputs from the modulation buffer drive these differential current outputs. mc an external voltage sets the main value of modulation current i o . r set an external resistor sets the source current for modulation imod. nc these pins are not connected. pin names truth table (1)
3 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 symbol rating value unit v cc power supply voltage (v cc = 0v) 0 to 7.0 v v in input voltage (v cc = 0v) 0 to 6.0 v i out output current 75 ma t lead lead temperatre (soldering, 20sec.) +260 c t a operating temperature range 40 to +85 c p d power dissipation 500 mw 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 condi tions for extended periods may affect device reliability. absolute maximum ratings (1) symbol rating value unit v ee power supply voltage 4.75 to 5.25 v r set resistor to adjust current 10 to 100 ? r ext resistor to dissipate power 10 to 50 ? r ser laser diode serial resistor 0 to 50 ? operationing conditions (1) note: 1. the voltage drop across r ext and r ser should not be greater than 2v.
4 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 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 pd clk propagation delay 1000 1000 1000 1000 ps clk - out t pd mr propogation delay 1000 1000 1000 1000 ps mr - out t r rise/fall time 400 400 400 400 ps t f (20% to 80%) t s set-up time 100 100 100 100 ps t h hold time 200 200 200 200 ps t pw minimum pulse width 400 400 400 400 ps (clk, mr) dc electrical characteristics (1) v cc = v cco = 0v; v ee = 5.0v 5% notes: 1. r set = 10 ? 1% 2. v i = v il (min.) 3. v imod = vcc 4. v imod = 3.5v 5. v lmod = 0.8v 6. i oh = 5 to 60ma 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 ih input high voltage 1165 880 1165 880 1165 880 1165 880 mv (d, clk, mr) v il input low voltage 1810 1475 1810 1475 1810 1475 1810 1475 mv (d, clk, mr) v imod input voltage v ee v cc v ee v cc v ee v cc v ee v cc v (modulation control) v bb output reference 1380 1260 1380 1260 1380 1260 1380 1260 mv voltage i ih input high current 150 150 150 150 a (d, clk, mr) i imod input current 150 150 150 150 a (modulation control) i il input low current (2) 0.5 0.5 0.5 0.5 a (d, clk, mr) i cc supply current (3) 8 14 25 8 14 25 8 14 25 8 14 25 ma i oh output high current (4) 60 64 68 60 64 68 60 64 68 60 64 68 ma (mr low) (5) 5 5 5 5 i ol output low current 500 500 500 500 a (mr high) i or output current ringing (6) 10 10 10 10 % i omod laser diode modulation 5 60 5 60 5 60 5 60 ma current range note: 1. r set = 10 ? 1%, r ext = r ser = 50 ? 1% ac electrical characteristics (1)
5 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 performance curves 20 30 40 50 60 70 i o (ma) i o vs. t a and v mod 10 2.0 3.0 4.0 5.0 0 1.0 0 t a = 0 ? c t a = 25 ? c t a = 70 ? c -v mod (v)
6 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 application example notes: 1. split 100k ecl terminations are 82 ? and 130 ? to v cc and v ee respectively. 2. recommended power supply bypass capacitors are 0.1 f with optional 10 f tantalum in parallel. 3. high frequency design techniques are required for board layout. a double sided or multilayer board is recommended in conjunc tion with a low impedance ground plane and properly terminated transmission lines for all signal paths. 4. v bb voltage pin may be used as reference for single ended input applications. v cc r set v ee v cco d 50 ? coax 50 ? coax r ext r set sy100el1001 v ee v ee out r ser laser module inputs 50 ? coax laser bias / apc control 470k ? 0.1f 0.1f 1k ? 1k ? 10k ? 1k ? b 750 ? 47k ? 47k ? 4.7k ? 47k ? 10k a clk clk out 0.02f v ee v cc v cc v cc ic 1 = ic 2 = lm324 v ee = 5.0v v cc = 0v ic 2 + ic 1 + 0.1h 50 ? coax mr d 50 ? coax v cc v cc 0.1f 130 ? 82 ? v cc 500 ? 24 ? 10 ? mc v cc v ee 10k
7 sy100el1001 micrel, inc. m9999-031306 hbwhelp@micrel.com or (408) 955-1690 16-pin soic .150" wide (z16-2) rev. 02 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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