Micrel, Inc. 3.3V 3.2Gbps SONET/SDH LASER DRIVER FEATURES ■ ■ ■ ■ ■ ■ ■ SY88912L SY88912L DESCRIPTION Up to 3.2Gbps operation Modulation current to 60mA Rise/Fall times <70PS Single 3.3V power supply Programmable laser modulation current Operating temperature range of –40°C to 85°C Available in tiny 16-pin MLF™ package The SY88912L is the smallest laser driver with programmable modulation current for SONET/SDH applications up to 3.2Gbps. The device accepts either PECL or CML level data inputs. The SY88912L provides modulation current of up to 60mA for FP (Fabry-Perot) or DFB (Distributed Feedback) laser. There is a 75kΩ pull-down resistor to VEE at the input of /EN. An active low PECL enable signal shuts off modulation current. 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 Internal Logic /DIN /EN BIAS Control IMOD VCC IBIAS GND VREF RSET GND RSET MLF and Micro LeadFrame are trademarks of Amkor Technology, Inc. M9999-081005 [email protected] or (408) 955-1690 Rev.: B 1 Amendment: /0 Issue Date: August 2005 Micrel, Inc. SY88912L DIN VCC /EN GND GND PACKAGE/ORDERING INFORMATION 16 15 14 13 1 Ordering Information 12 OUT Part Number Package Type Operating Range Package Marking Lead Finish SY88912LMI MLF-16 Industrial 912L Sn-Pb MLF-16 Industrial 912L Sn-Pb GND 2 11 OUT SY88912LMITR(1) GND 3 10 /OUT SY88912LMG MLF-16 Industrial /DIN 4 9 /OUT 912L with Pb-Free bar-line indicator Pb-Free NiPdAu SY88912LMGTR(1) MLF-16 Industrial 912L with Pb-Free bar-line indicator Pb-Free NiPdAu 8 Note: GND 7 RSET VCC 6 VREF 5 1. Tape and Reel. 16-Pin MLF™ (MLF-16) TRUTH TABLE(1) PIN NAMES Pin Function D /D /EN OUT(2) /OUT DIN, /DIN NRZ differential data inputs. L H L H L /EN PECL compatible active low input. H L L L H GND Most negative power supply input. X X H H L OUT, /OUT Open collector outputs from the modulation driver. RSET An external resistor between VREF and RSET defines the modulation current. VCC Most positive power supply input. VREF Voltage reference for use with RSET. M9999-081005 [email protected] or (408) 955-1690 Notes: 1. L = LOW, H = HIGH, X = don't care. 2. IOUT ≤ IMOD_OFF when /EN is HIGH. 2 Micrel, Inc. SY88912L ABSOLUTE MAXIMUM RATINGS(1) Symbol Parameter Value Unit VCC Power Supply Voltage 0 to +5.0 V VIN Input Voltage 0 to VCC V IOUT Output Current 65 mA Tstore Storage Temperature –55 to +125 °C TA Operating Temperature –40 to +85 °C PD Power Dissipation 500 mW θJA(2) Package Thermal Resistance (Junction-to-Ambient) 59 °C/W ψJB Package Thermal Resistance (Junction-to-Board) 32.1 °C/W –Still-Air 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. 2. JEDEC standard test boards with DIE attach pads soldered to PCB. OPERATING CONDITIONS Symbol VCC REXT RSET Parameter Power Supply Voltage (1) Resistor to Dissipate Power Resistor to Set IMOD Note: 1.Refer to VOUT specification. M9999-081005 [email protected] or (408) 955-1690 3 Value Unit +3.15 to +3.45 V 5 (Min.) Ω 100 to 10,000 Ω Micrel, Inc. SY88912L DC ELECTRICAL CHARACTERISTICS VCC = 3.15 to 3.45V; GND = 0V; TA = –40°C to +85°C Symbol Parameter Min. Typ.(2) Max. Unit Condition Current(1) — 65 80 mA IMOD = 60mA 10 — 60 mA — — 200 µA /EN = VIHEN 200 — 1600 mVPP (3) ICC Power Supply IMOD Modulation Current Range Current(2) IMOD_OFF Modulation Off VIDDIN Input Differential Voltage, DIN, /DIN VIHDIN Input HIGH Voltage, DIN, /DIN VCC –1.7 — VCC –0.1 V VILDIN Input LOW Voltage, DIN, /DIN VCC –1.9 — VCC –0.3 V VIHEN Input HIGH Voltage, /EN VCC –1165 — VCC –880 mV VILEN Input LOW Voltage, /EN VCC –1810 — VCC –1475 mV VOUT Output Voltage, OUT, /OUT VCC –1.5 — VCC V VREF Reference Voltage1.5 1.7 1.9 V (4) Notes: 1. 2. 3. 4. Excluding IMOD. IMOD ≤ 60mA Typical values are under VCC = 3.3V and TA = 25°C. VIDDIN is the voltage required to guarantee a stable logic level. For a logic "1", DIN must be VIDDIN above /DIN. For stable logic "0", DIN must be VIDDIN below /DIN. OUT and /OUT are current outputs. This specification defines the voltage range that the user must guarantee these pins remain within proper operation. AC ELECTRICAL CHARACTERISTICS(1) VCC = 3.15 to 3.45V; GND = 0V; TA = –40°C to +85°C Symbol Min. Typ. Max. Unit Condition DJ Jitter Generation(2),(3) Parameter — — 20 ps peak-to-peak tr, tf Rise/Fall Times(2) (20% to 80%) — 65 — ps Notes: 1. AC characteristics are guaranteed by design and characterization. 2. IMOD = 40mA, 25Ω resistors each tied from OUT and /OUT to VCC. 3. IMOD = 40mA, 2.5Gbps, 0-1 pattern, BW = 12KHz to 20MHz. IMOD vs. RSET 70 60 IMOD (mA) 50 40 30 20 10 0 0.1 1 RSET (kΩ) Figure 1. IMOD vs. RSET M9999-081005 [email protected] or (408) 955-1690 4 10 Micrel, Inc. SY88912L 16 LEAD EPAD-Micro LEADFRAME™ (MLF-16) Rev. 01 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 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. M9999-081005 [email protected] or (408) 955-1690 5