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| Micrel, Inc. 5V/3.3V 2.5Gbps LASER DIODE DRIVER SY88922V SY88922V FEATURES Up to 2.5Gbps operation 30mA modulation current Separate modulation control Separate output enable for laser safety Differential inputs for data 75K input pull-down resistor 3.3V and 5V power supply options Available in a tiny 10-pin (3mm x 3mm) MSOP DESCRIPTION The SY88922V is a high-speed current switch for driving a semiconductor laser diode in optical transmission applications. The modulation current (IOUT) is controlled by the current (IRSET) through the external resistor RSET. The output OUT is HIGH when output enable is HIGH. The device incorporates complementary open collector outputs with a capability of driving peak current of 30mA. The resistor REXT 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 SY88922V utilizes the high-performance bipolar ASSETTM technology. All support documentation can be found on Micrel's web site at www.micrel.com. APPLICATIONS 1.25Gbps and 2.5Gpbs Gigabit Ethernet 531Mbps, 1062Mbps and 2.12Gbps Fibre Channel 622Mbps SONET Gigabit Interface Converter 2.5Gbps SDH/SONET 2.5Gbps Proprietary Links BLOCK DIAGRAM VCC REXT /OUT OUT RSER DIN /DIN IMOD /EN BIAS Control Internal Logic to Laser Diode 40X VCC GND GND Modulation Control RSET VREF RSET ASSET is a trademark of Micrel, Inc. M9999-091906 hbwhelp@micrel.com or (408) 955-1690 Rev.: F Amendment: /0 1 Issue Date: September 2006 Micrel, Inc. SY88922V PACKAGE/ORDERING INFORMATION Ordering Information(1) /EN 1 DIN 2 /DIN 3 VREF 4 RSET 5 10 OUT 9 OUT 8 /OUT 7 GND 6 VCC Part Number SY88922VKC SY88922VKCTR(2) SY88922VKG SY88922VKGTR(2) Package Type K10-1 K10-1 K10-1 K10-1 Operating Range Commercial Commercial Industrial Industrial Package Marking SY88922V SY88922V SY88922V with Pb-Free bar-line indicator SY88922V with Pb-Free bar-line indicator Lead Finish Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu 10-Pin MSOP (K10-1) Notes: 1. Contact factory for die availability. Die is guaranteed at TA = 25C, DC electricals only. 2. Tape and Reel. PIN DESCRIPTION Pin Number 1 2, 3 4 5 6 7 8, 9, 10 Pin Name /EN DIN, /DIN VREF RSET VCC GND /OUT, OUT Pin Function Enable. This PECL 100k compatible input enables Laser Driver. Modulation current goes to zero when asserted HIGH. Differential PECL 100k compatible inputs which receive NRZ data. Voltage reference for use with RSET. An external resistor sets up the source current for modulation IMOD. Most positive power supply input. Ground. Open collector outputs from the modulation buffer drive these differential current outputs. TRUTH TABLE(1) D L H X Notes: 1. L = LOW, H = HIGH, X = don't care. 2. H = IOUT = 0mA. /D H L X /EN L L H OUT (2) H L H /OUT L H L M9999-091906 hbwhelp@micrel.com or (408) 955-1690 2 Micrel, Inc. SY88922V Absolute Maximum Ratings(1) Supply Voltage (VCC) ..................................... +0V to +7.0V Input Voltage (VIN) ................................................. 0 to VCC Output Current (VOUT) ............................................... 30mA Power Dissipation (PD) ........................................... 250mW Lead Temperature (soldering, 20 sec.) ..................... 260C Maximum Operating Junction Temperature (TJ) ..... +125C Storage Temperature (TS) ....................... -55C to +125C Operating Ratings(2) Supply Voltage (VCC) .............................. +4.5V to +5.5V or ............................................................ +3.0V to +3.6V Ambient Temperature (TA) ......................... -40C to +85C Capacitance on OUT + /OUT (COUT) ................ 2.5pF (typ.) Resistor to Dissipate Power (REXT) .................... 10 to 50 Laser Diode Serial Resistor (RSER) ...................... 0 to 50 Resistor to Adjust Current (RSET)(4) ............... 700 to 20,000 Package Thermal Resistance(3) MSOP (JA) Still-air ........................................... 113C/W MSOP (JB) ........................................................ 74C/W DC ELECTRICAL CHARACTERISTICS GND = 0V; VCC = +5.0V 10% or VCC = +3.3V 10%; TA = -40C to +85C; unless noted. Symbol VIH VIL VREF IIL IIH ICC IOL IOUT IRSET ARSET Notes: 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 Ratings conditions for extended periods may affect device reliability. 2. The voltage drop across REXT and RSER plus Laser Diode should not be greater than 1V. 3. Still-air without heatsink. 4. RSET minimum 430. 5. VIN = VIL (min). 6. IMOD = 25mA. Parameter Input HIGH Voltage (DIN, /DIN, /EN) Input LOW Voltage (DIN, /DIN, /EN) Reference Voltage Input LOW Current (DIN, /DIN, /EN)(5) Input HIGH Current (DIN, /DIN, /EN) Supply Current(6) Output LOW Current (/EN = HIGH) Modulation Current Modulation Control =IOUT /IRSET Condition Min VCC -1165 VCC -1810 1.7 0.5 Typ Max VCC -880 VCC -1475 Units mV mV V A 2.0 2.3 100 25 450 1000 30 0.125 30 38 0.625 44 A mA A mA mA -- M9999-091906 hbwhelp@micrel.com or (408) 955-1690 3 Micrel, Inc. SY88922V AC ELECTRICAL CHARACTERISTICS(7) IMOD =10mA; GND = 0V; VCC = +5V 10% or VCC = +3.3V 10%; TA = -40C to +85C; unless noted. Symbol tpd D tpd EN tr, tf IOR DJ Notes: 7. REXT = RSER = 25 1%; RSER connects to VCC directly without Laser Diode. 8. IMOD = 10mA. 9. IOH = 5 to 25mA. 10. IMOD = 10mA, 2.5Gbps, 223-1 pattern. Parameter Propagation Delay (DIN - OUT) Propagation Delay (/EN - OUT) Rise/Fall Time(8) (20% to 80%) Output Current Ringing(9) Deterministic Jitter(10) Condition Min Typ 400 400 74 Max Units ps ps 130 10 ps % psrms 7 TYPICAL CHARACTERISTICS 40 IOUT vs. RSET 30 IOUT (A) VCC = 5.0V 20 10 VCC = 3.3V 0 0.0 1.0 2.0 3.0 RSET(k) 4.0 5.0 M9999-091906 hbwhelp@micrel.com or (408) 955-1690 4 Micrel, Inc. SY88922V 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 data sheet is believed to be accurate and reliable. However, no responsibility 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 appliances, 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, and 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 at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2005 Micrel, Incorporated. M9999-091906 hbwhelp@micrel.com or (408) 955-1690 5 |
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