LASER DIODE DRIVER WITH INPUT D FLIP-FLOP Micrel, Inc. FEATURES ■ ■ ■ ■ ■ ■ ■ ■ SY100EL1001 SY100EL1001 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 75KΩ 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 RSET. The resistor REXT must be placed between /OUT and VCC to dissipate the worst case power. RSER is recommended to fix laser diode matching issues. The SY100EL1001 utilizes the high performance bipolar ASSET™ technology. BLOCK DIAGRAM V CC REXT V BB OUT OUT RSER D, D CLK, CLK D Flip-Flop to Laser Diode MR BIAS Control Modulation Control RSET MC V EE ASSET is a trademark of Micrel, Inc. M9999-031306 [email protected] or (408) 955-1690 Rev.: I 1 1 Amendment: /0 Issue Date: March 2006 Micrel, Inc. SY100EL1001 PACKAGE/ORDERING INFORMATION Ordering Information(1) NC 1 16 V CC Part Number CLK 2 15 NC SY100EL1001ZC CLK 3 RSET 4 V CCO 5 D 14 Top View SOIC Z16-2 MC Package Type Operating Range Package Marking Lead Finish Z16-2 Commercial SY100EL1001ZC Sn-Pb SY100EL1001ZCTR(2) Z16-2 Commercial SY100EL1001ZC Sn-Pb SY100EL1001ZI Z16-2 Industrial SY100EL1001ZI Sn-Pb 13 OUT SY100EL1001ZITR(2) Z16-2 Industrial SY100EL1001ZI Sn-Pb 12 OUT SY100EL1001ZG(3) Z16-2 Industrial 6 11 V BB SY100EL1001ZG with Pb-Free bar-line indicator Pb-Free NiPdAu SY100EL1001ZGTR(2, 3) Z16-2 Industrial D 7 10 NC SY100EL1001ZG with Pb-Free bar-line indicator Pb-Free NiPdAu MR 8 9 V EE Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. 2. Tape and Reel. 3. Pb-Free package is recommended for new designs. 16-Pin Narrow SOIC (Z16-2) TRUTH TABLE(1) PIN NAMES Pin VCC, VCCO Function Most positive power supply pins separation helps to isolate sensitive circuitry from noise generating function. +5V for PECL operation or ground for ECL operation. VEE Most negative power supply input. Ground for PECL operation or -5V for ECL operation. VBB 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 IO. RSET An external resistor sets the source current for modulation Imod. NC These pins are not connected. M9999-031306 [email protected] or (408) 955-1690 D /D CLK /CLK MR OUT /OUT L H Z ZZ L H L H L Z ZZ L L H X X X X H H L Note: 1. L = LOW, H = HIGH, Z = LOW-to-HIGH transition, ZZ = HIGH-to-LOW transition, X = don't care. 2 Micrel, Inc. SY100EL1001 ABSOLUTE MAXIMUM RATINGS(1) Symbol Value Unit VCC Power Supply Voltage (VCC = 0V) Rating 0 to –7.0 V VIN Input Voltage (VCC = 0V) 0 to –6.0 V IOUT Output Current 75 mA TLEAD Lead Temperatre (soldering, 20sec.) +260 °C TA Operating Temperature Range –40 to +85 °C PD 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 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. OPERATIONING CONDITIONS(1) Symbol Rating Value Unit –4.75 to –5.25 V VEE Power Supply Voltage RSET Resistor to Adjust Current 10 to 100 Ω REXT Resistor to Dissipate Power 10 to 50 Ω RSER Laser Diode Serial Resistor 0 to 50 Ω Note: 1. The voltage drop across REXT and RSER should not be greater than 2V. M9999-031306 [email protected] or (408) 955-1690 3 Micrel, Inc. SY100EL1001 DC ELECTRICAL CHARACTERISTICS(1) VCC = VCCO = 0V; VEE = –5.0V ± 5% TA = –40°C Symbol Parameter TA = 0°C TA = +25°C Min. Typ. Max. Min. Typ. Max. Min. TA = +85°C Typ. Max. Min. Typ. Max. Unit VIH Input HIGH Voltage (D, CLK, MR) –1165 — –880 –1165 — –880 –1165 — –880 –1165 — –880 VIL Input LOW Voltage (D, CLK, MR) –1810 — –1475 –1810 — –1475 –1810 — –1475 –1810 — –1475 mV VImod Input Voltage (Modulation Control) VEE — VBB Output Reference Voltage –1380 — IIH Input HIGH Current (D, CLK, MR) — — 150 — — 150 — — 150 — — 150 µA IImod Input Current (Modulation Control) — — 150 — — 150 — — 150 — — 150 µA IIL Input LOW Current(2) (D, CLK, MR) 0.5 — — 0.5 — — 0.5 — — 0.5 — — µA ICC Supply Current(3) 8 14 25 8 14 25 8 14 25 8 14 25 mA IOH Output HIGH Current(4) (MR LOW)(5) 60 64 — 68 — 60 5 64 — 68 — 60 5 64 — 68 — 60 5 64 — 68 — mA 5 IOL Output LOW Current (MR HIGH) — — 500 — — 500 — — 500 — — 500 µA IOR Output Current Ringing(6) — — 10 — — 10 — — 10 — — 10 % IOmod Laser Diode Modulation Current Range 5 — 60 5 — 60 5 — 60 5 — 60 mA VCC VEE — –1260 –1380 — VCC VEE –1260 –1380 — — VCC VEE –1260 –1380 — — VCC mV V –1260 mV Notes: 1. RSET = 10Ω ± 1% 2. VI = VIL (Min.) 3. VImod = VCC 4. VImod = –3.5V 5. VLmod = –0.8V 6. IOH = 5 to 60mA AC ELECTRICAL CHARACTERISTICS(1) TA = –40°C Symbol Parameter TA = 0°C TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Unit tpd CLK Propagation Delay CLK - OUT — — 1000 — — 1000 — — 1000 — — 1000 ps tpd MR Propogation Delay MR - OUT — — 1000 — — 1000 — — 1000 — — 1000 ps tr tf Rise/Fall Time (20% to 80%) — — 400 — — 400 — — 400 — — 400 ps tS Set-up Time 100 — — 100 — — 100 — — 100 — — ps tH Hold Time 200 — — 200 — — 200 — — 200 — — ps tPW Minimum Pulse Width (CLK, MR) 400 — — 400 — — 400 — — 400 — — ps Note: 1. RSET = 10Ω ± 1%, REXT = RSER = 50Ω ± 1% M9999-031306 [email protected] or (408) 955-1690 4 Micrel, Inc. SY100EL1001 PERFORMANCE CURVES IO vs. TA and Vmod IO (mA) 70 TA = 0˚C TA = 25˚C TA = 70˚C 60 50 40 30 20 10 0 0 1.0 2.0 3.0 4.0 5.0 -Vmod (V) M9999-031306 [email protected] or (408) 955-1690 5 SY100EL1001 Micrel, Inc. APPLICATION EXAMPLE 82Ω 50Ω COAX VCC VCCO VCC REXT VEE A 10Ω 1kΩ VCC 1kΩ 750Ω 0.02µF VCC VCC + – 0.1µF 470kΩ 2 IC 47kΩ 10k VEE 47kΩ 4.7kΩ 1 IC – + 1kΩ 10kΩ 47kΩ LASER BIAS / APC CONTROL 0.1µH LASER MODULE 0.1µF RSER 500Ω VCC OUT MC D RSET RSET 10k OUT VEE SY100EL1001 VEE VCC 0.1µF D CLK 50Ω COAX 50Ω COAX MR CLK 130Ω 50Ω COAX 50Ω COAX VEE 24Ω 2 B 6 M9999-031306 [email protected] or (408) 955-1690 VCC 1 IC = IC = LM324 VEE = –5.0V VCC = 0V NOTES: 1. Split 100K ECL terminations are 82Ω and 130Ω to VCC and VEE respectively. 2. Recommended power supply bypass capacitors are 0.1µF with optional 10µF Tantalum in parallel. 3. High frequency design techniques are required for board layout. A double sided or multilayer board is recommended in conjunction with a low impedance ground plane and properly terminated transmission lines for all signal paths. 4. VBB voltage pin may be used as reference for single ended input applications. INPUTS Micrel, Inc. SY100EL1001 16-PIN SOIC .150" WIDE (Z16-2) Rev. 02 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 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. © 2006 Micrel, Incorporated. M9999-031306 [email protected] or (408) 955-1690 7