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| Micrel, Inc. 5V/3.3V 622Mbps LASER DIODE DRIVER WITH OUTPUT ENABLE SY88722V SY88722V FEATURES s s s s s s Single 3.3V or 5V power supply Up to 622Mbps operation Modulation current to 30mA PECL output enable Differential PECL inputs Available in a tiny 10-pin (3mm) MSOP DESCRIPTION The SY88722V 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 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 REXT must be placed between /OUT and VCC to dissipate the worst case power. RSER is recommended to compensate for laser diode matching issues. Pins 9 and 10 should be connected to achieve better performance. The SY88722V utilizes the high performance bipolar ASSETTM technology. APPLICATIONS s 622Mbps SONET FUNCTIONAL BLOCK DIAGRAM VCC REXT /OUT OUT RSER DIN /DIN Internal Logic to Laser Diode IMOD /EN 40X VCC GND VEE VREF RSET RSET ASSET is a trademark of Micrel, Inc. M9999-072505 hbwhelp@micrel.com or (408) 955-1690 Rev.: B Amendment: /0 1 Issue Date: July 2005 Micrel, Inc. SY88722V PACKAGE/ORDERING INFORMATION /EN 1 DIN 2 /DIN 3 VREF 4 RSET 5 10 OUT 9 OUT 8 /OUT 7 GND 6 VCC Ordering Information Part Number SY88722VKC SY88722VKCTR(1) SY88722VKG Package Type K10-1 K10-1 K10-1 K10-1 Operating Range Commercial Commercial Industrial Industrial Package Marking 722V 722V 722V with Pb-Free bar-line indicator 722V with Pb-Free bar-line indicator Lead Finish Sn-Pb Sn-Pb Pb-Free NiPdAu Pb-Free NiPdAu 10-Pin MSOP (K10-1) SY88722VKGTR(1) Note: 1. 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 100k PECL compatible input with 75k pulldown resistor. Modulation current goes to zero when deasserted high. Differential 100k PECL compatible input with 75k pulldown resistors. Voltage reference for use with RSET. An external resistor from here to VREF sets the reference current for IOUT. Positive power supply. Device ground. Differential open collector current outputs. TRUTH TABLE(Note 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 (Note 2) H L H /OUT L H L M9999-072505 hbwhelp@micrel.com or (408) 955-1690 2 Micrel, Inc. SY88722V Absolute Maximum Ratings(Note 1) Power Supply Voltage (VCC) ............................ 0V to +7.0V Input Voltage (VIN) .............................................. 0V to VCC Output Current (IOUT) ................................................. 30mA Power Dissipation (PD) ........................................... 250mW Lead Temperature (soldering, 20 sec.) ................... +260C Storage Temperature Range (TS) ............ -55C to +125C Operating Ratings(Notes 2, 3, 4) Supply Voltage (VIN) ................................... +3.0V to +3.6V ........................................................ or +4.5V to +5.5V Ambient Temperature (TA), Note 5 ............ -40C to +85C Junction Temperature (TJ), Note 5 ............ -40C to 100C Resistor to Dissipate Power (REXT) .................. 10 to 50 Laser Diode Serial Resistor (RSER) .................... 0 to 50 Resistor to Adjust Current (RSET), Note 6 . 700 to 20,000 Package Thermal Resistance MSOP (JA) Still-Air ...................................................... 113C/W (JB) Still-Air ........................................................ 74C/W 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. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. The device is guaranteed to meet the DC specifications, shown in the table above, after thermal equilibrium has been established. The device is tested in a socket such that transverse airflow of 500lfpm is maintained. The voltage drop across REXT and RSER plus Laser Diode must not be greater than 1.4V. Commercial devices are guaranteed from 0C to +85C ambient temperature. RSET minimum 430. Note 2. Note 3. Note 4. Note 5. Note 6. DC ELECTRICAL CHARACTERISTICS(Note 1) GND = 0V; VCC = 3.3V 10% or VCC = 5.0V 10%; TA = -40C to +85C Symbol VIH VIL VREF IIL IIH ICC IOUT_OFF IOUT ARSET VOUT COUT Note 1. Parameter Input HIGH Voltage (DIN, /DIN, /EN) Input LOW Voltage (DIN, /DIN, /EN) Reference Voltage Input LOW Current (DIN, /DIN, /EN) Input HIGH Current (DIN, /DIN, /EN) Supply Current Output LOW Current (/EN = HIGH) Modulation Current IOUT/IRSET Voltage at OUT, /OUT Capacitance on OUT, /OUT Specification for packaged product only. Condition Min VCC-1.165 VCC-1.810 1.7 Typ Max VCC-0.880 VCC-1.475 Units V V V A 2.0 2.3 VIN = VIL(min) 0.5 100 A mA A mA -- V pF IMOD = 25mA 450 25 1000 30 30 VCC-1.4 2.5 38 44 VCC M9999-072505 hbwhelp@micrel.com or (408) 955-1690 3 Micrel, Inc. SY88722V AC ELECTRICAL CHARACTERISTICS(Note 1, 2) IMOD =10mA; GND = 0V; VCC = 3.3V 10% or VCC = 5.0V 10%; TA = 0C to +85C Symbol tPHL,tPLH D tPHL,tPLH EN tr, tf IOR Note 1. Note 2. Parameter Propagation Delay DIN - OUT Propagation Delay /EN - OUT Rise/Fall Time (20% to 80%) Output Current Ringing Specification for packaged product only. Condition IOUT = 10mA IOUT = 10mA Min Typ Max 1000 1000 400 Units ps ps ps % IOUT = 5 to 30mA 10 REXT = RSER = 25 1%; RSER connected directly to VCC. TYPICAL OPERATING CHARACTERISTICS 40 IMOD vs. RSET 30 IMOD (mA) VCC = 5.0V 20 10 VCC = 3.3V 0 0 1.0 2.0 3.0 RSET (k) 4.0 5.0 M9999-072505 hbwhelp@micrel.com or (408) 955-1690 4 Micrel, Inc. SY88722V 10 LEAD MSOP (K10-1) Rev. 00 MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 TEL USA + 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 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. M9999-072505 hbwhelp@micrel.com or (408) 955-1690 5 |
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