3.3V 3.2Gbps SONET/SDH LASER DRIVER WITH OUTPUT DISABLE Micrel, Inc. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ SY88932L SY88932L DESCRIPTION Up to 3.2Gbps operation Modulation current to 60mA Rise/fall times 65ps typical Input 50Ω internally terminated to VCC TTL /EN with internal 75kΩ pull-down Designed for use with MIC3000 optical transceiver management IC Voltage programmable laser modulation current Single 3.3V power supply Operating temperature range of –40°C to 85°C Available in tiny 16-pin MLF™ package The SY88932L is the smallest available laser driver with a programmable modulation current up to 60mA for FabryPerot (FP) or distributed feedback (DFB) lasers. The device is suitable for SONET/SDH applications with data rates up to 3.2Gbps. 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. All support documentation can be found on Micrel’s web site at www.micrel.com. APPLICATIONS ■ ■ ■ ■ ■ ■ ■ Fiber optical module Transponder XAUI CWDM SONET/SDH transmission system Add-drop MUX Metro area network 2.5Gbps optical transmitter BLOCK DIAGRAM VCC REXT VCC VCC /OUT OUT DIN /DIN Internal Logic /EN VREF Generator VREF Modulation Control IMOD VCC IBIAS GND GND VCNTRL MLF and MicroLeadFrame are trademarks of Amkor Technology, Inc. M9999-082205 [email protected] or (408) 955-1690 Rev.: E 1 Amendment: /0 Issue Date: August 2005 Micrel, Inc. SY88932L 16 GND 15 14 Ordering Information GND VREF /EN VCNTRL PACKAGE/ORDERING INFORMATION 13 1 OUT 12 DIN 2 11 OUT /DIN 3 10 /OUT GND 4 9 /OUT Package Type Operating Range Package Marking SY88932LMI MLF-16 Industrial 932L Sn-Pb SY88932LMITR(1) MLF-16 Industrial 932L Sn-Pb SY88932LMG MLF-16 Industrial 932L with Pb-Free bar-line indicator Pb-Free NiPdAu SY88932LMGTR(1) MLF-16 Industrial 932L with Pb-Free bar-line indicator Pb-Free NiPdAu 8 Lead Finish Note: GND VCC 7 GND 6 VCC 5 Part Number 1. Tape and Reel. 16-Pin MLF™ PIN DESCRIPTION Pin Number Pin Name Pin Function 2, 3 DIN, /DIN NRZ differential data (inputs), CML terminated interface with 50Ω to VCC. 1, 4, 7, 8, 13 GND Ground. 5, 6, VCC Positive power supply. 9, 10, 11, 12, OUT, /OUT 14 VREF 15 VCNTRL 16 /EN Enable: TTL compatible active low input with 75kΩ pull-down resistor. ` Open collector (outputs) from the modulation driver. Voltage reference, nominally 1.25V with respect to ground. Voltage control of IMOD. 5kΩ input impedance. See “Typical Operating Characteristics.” 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 given for voltage rather than optical outputs. Hence, a voltage HIGH on 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 optical HIGH, and vice versa. 2. L = LOW, H = HIGH, X = don't care. 3. IOUT ≤ IMOD_OFF when /EN is HIGH. M9999-082205 [email protected] or (408) 955-1690 2 Micrel, Inc. SY88932L Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VCC) .................................. –0.5V to +4.0V CML Input Voltage (VIN) ............... VCC –1.0V to VCC +0.5V TTL Control Input Voltage (VIN) .......................... 0V to VCC Lead Temperature (soldering, 10 sec.) ..................... 265°C Storage Temperature (TS) ....................... –65°C to +150°C Supply Voltage (VCC) .................................. +3.0V to +3.6V Ambient Temperature (TA) ......................... –40°C to +85°C Junction Temperature (TJ) ....................... –40°C to +120°C Package Thermal Resistance(3) MLF™ (θJA) Still-air ............................................ 61°C/W MLF™ (ψJB) Still-air ............................................ 38°C/W DC ELECTRICAL CHARACTERISTICS VCC = 3.0 to 3.6V, GND = 0V, TA = –40°C to +85°C; Typical values at VCC = 3.3V, TA = 25°C. Symbol Parameter Condition Min ICC Power Supply Current Note 4 IMOD Modulation Current Range IMOD_OFF Modulation Off Current VIR CML Input Voltage Range VID CML Input Differential Voltage (DIN, /DIN) VIHEN TTL Input HIGH Voltage (/EN) VILEN TTL Input LOW Voltage (/EN) VOUT Voltage (OUT, /OUT) Note 6 VCC–1.5 VREF Reference Voltage Note 7 1.2 Typ Max Units 57 80 mA 60 mA 200 µA VCC+0.4 V 1600 mVpp 10 /EN = VIHEN VCC–0.8 Note 5 400 800 2.0 V 0.8 V VCC V 1.3 V 1.25 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 forextended periods may affect device reliability. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Thermal resistance numbers are for 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 IMOD. IMOD set to 60mA with 25Ω load to VCC on OUT, /OUT. Inputs floating. V 5. VID is the voltage required to guarantee a stable logic level. For logic “1”, DIN must be ID above /DIN. For stable logic “0”, DIN must 2 VID be below /DIN. 2 6. OUT and /OUT are current outputs. This specification defines the voltage range that the user must guarantee these pins remain within for proper operation. 7. VREF intended to source/sink ≤ |5mA|. M9999-082205 [email protected] or (408) 955-1690 3 Micrel, Inc. SY88932L AC ELECTRICAL CHARACTERISTICS(8) VCC = 3.0 to 3.6V, GND = 0V, TA = –40°C to +85°C; Typical values at VCC = 3.3V, TA = 25°C, RLOAD = 25Ω to VCC (OUT, /OUT). Symbol Parameter Condition tr, tf Output Rise/Fall Times (20% to 80%) DJ Deterministic Jitter Min Typ Max Units Note 9 65 100 ps Notes 9, 10 20 Notes: 8. AC characteristics are guaranteed by design and characterization. 9. IMOD = 60mA. 10. Deterministic jitter measured using K28.5 pattern of 2.486Gbps, VID = 1600mVpp. TYPICAL OPERATING CHARACTERISTICS IMOD vs. VCNTRL 80 70 IMOD (mA) 60 50 40 30 VCC = 3.3V TA = 25°C 20 10 0 M9999-082205 [email protected] or (408) 955-1690 0 0.2 0.4 0.6 0.8 1 VCNTRL (V) 4 1.2 1.4 pspp Micrel, Inc. SY88932L 16 LEAD EPAD-MicroLeadFrame™ (MLF-16) Package EP- Exposed Pad Die CompSide Island Heat Dissipation Heat Dissipation VEE Heavy Copper Plane VEE Heavy Copper Plane PCB Thermal Consideration for 16-Pin MLF™ Package Package Notes: 1. Package meets Level 2 qualification. 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 TEL + 1 (408) 944-0800 FAX + 1 (408) 474--1000 WEB USA 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. © 2005 Micrel, Incorporated. M9999-082205 [email protected] or (408) 955-1690 5