Precision Edge® Micrel, Inc. 6GHz, 1:2 FANOUT BUFFER/TRANSLATOR Precision Edge SY58013U ® w/400mV LVPECL OUTPUTS and INTERNAL SY58013U INPUT TERMINATION FEATURES ■ Precision 1:2, 400mV LVPECL fanout buffer ■ Guaranteed AC performance over temperature and voltage: • > 6GHz fMAX clock • < 80ps tr/tf times • < 250ps tpd • < 15ps max. skew ■ Low jitter performance: • < 10psPP total jitter (clock) • < 1psRMS random jitter (data) • < 10psPP deterministic jitter (data) ■ Accepts an input signal as low as 100mV ■ Unique input termination and VT pin accepts DCcoupled and AC-coupled differential inputs: LVPECL, LVDS and CML ■ 400mV LVPECL compatible outputs ■ Power supply 2.5V ±5% and 3.3V ±10% ■ –40°C to +85°C temperature range ■ Available in 16-pin (3mm × 3mm) MLF® package Precision Edge® DESCRIPTION The SY58013U is a 2.5V/3.3V precision, high-speed, fully differential 1:2 LVPECL fanout buffer. Optimized to provide two identical output copies with less than 15ps of skew and less than 10ps(pk-pk) total jitter, the SY58013U can process clock signals as fast as 6GHz or data patterns up to 10.7Gbps. The differential input includes Micrel’s unique, 3-pin input termination architecture that interfaces to LVPECL, LVDS, and CML differential signals, (AC- or DC-coupled) as small as 100mV without any level-shifting or termination resistor networks in the signal path. For AC-coupled input interface applications, an on-board output reference voltage (VREFAC) is provided to bias the VT pin. The outputs are 400mV LVPECL compatible, with extremely fast rise/fall times guaranteed to be less than 80ps. The SY58013U operates from a 2.5V ±5% supply or 3.3V ±10% supply and is guaranteed over the full industrial temperature range (–40°C to +85°C). For applications that require greater output swing or CML compatible outputs, consider the SY58012U 1:2 fanout buffer with 800mV LVPECL outputs, or the SY58011U 1:2 fanout buffer with 400mV CML outputs. The SY58013U is part of Micrel’s high-speed, Precision Edge® product line. Datasheets and support documentation can be found on Micrel’s web site at www.micrel.com. APPLICATIONS ■ ■ ■ ■ ■ All SONET and All GigE clock distribution Fibre Channel clock and data distribution Backplanes Data distribution: OC-48, OC-48+FEC, XAUI High-end, low-skew, multiprocessor synchronous clock distribution TYPICAL PERFORMANCE FUNCTIONAL BLOCK DIAGRAM 2GHz Output VCC = 3.3V Q0 50Ω /Q0 Output Swing (100mV/div.) IN VT 50Ω /IN Q1 /Q1 VREF-AC TIME (70ps/div.) Precison Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-020207 [email protected] or (408) 955-1690 2GHz with 100mV Input Rev.: D 1 Amendment: /0 Issue Date: February 2007 Precision Edge® SY58013U Micrel, Inc. GND VCC 16 GND VCC PACKAGE/ORDERING INFORMATION 15 14 13 Ordering Information(1) Part Number Package Type Operating Range Package Marking Lead Finish SY58013UMI MLF-16 Industrial 013U Sn-Pb 2 11 /Q0 SY58013UMITR(2) MLF-16 Industrial 013U Sn-Pb VREF-AC 3 10 /Q1 SY58013UMG(3) MLF-16 Industrial /IN 4 9 Q1 013U with Pb-Free bar-line indicator Pb-Free NiPdAu SY58013UMGTR(2, 3) MLF-16 Industrial 013U with Pb-Free bar-line indicator Pb-Free NiPdAu 5 6 7 8 VCC Q0 VT GND 12 VCC 1 GND IN 16-Pin MLF® 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 recommended for new designs. PIN DESCRIPTION Pin Number Pin Name 1, 4 IN, /IN Differential Input: This input pair is the signal to be buffered. Each pin is internally terminated with 50Ω to the VT pin. Note that this input will default to an indeterminate state if left open. See “Input Interface Applications” section. 2 VT Input Termination Center-Tap: Each input terminates to this pin. The VT pin provides a center-tap for each input (IN, /IN) to a termination network for maximum interface flexibility. See “Input Interface Applications” section. 3 VREF-AC Reference Output Voltage: This output biases to VCC –1.2V. It is used for AC-coupled inputs (IN, /IN). Connect VREF-AC directly to the VT pin. Bypass with 0.01µF low ESR capacitor to VCC. Maximum curent source or sink is 0.5mA. See “Input Interface Applications” section. 5, 8, 13, 16 VCC Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the VCC pins as possible. 6, 7, 14, 15 GND, (Exposed Pad) Ground. Exposed pad must be connected to a ground plane that is the same potential as the ground pin. 12, 11 9, 10 Q0, /Q0, Q1, /Q1 M9999-020207 [email protected] or (408) 955-1690 Pin Function LVPECL Differential Output Pairs: Differential buffered output copy of the input signal. The output swing is typically 400mV. Unused output pairs may be left floating with no impact on jitter. See “LVPECL Output Termination” section. 2 Precision Edge® SY58013U Micrel, Inc. Absolute Maximum Ratings(Note 1) Operating Ratings(Note 2) Power Supply Voltage (VCC ) ....................... –0.5V to+4.0V Input Voltage (VIN) ......................................... –0.5V to VCC Output Current (IOUT) Continuous ............................................................. 50mA Surge .................................................................... 100mA VT Current Source or sink current on VT pin ........................ ±100mA Input Current Source or sink current on (IN, /IN) ....................... ±50mA VREF Current Source or sink current on VREF-AC, Note 4 ........ ±1.5mA Soldering, (20 sec.) ................................................... 260°C Storage Temperature Range (TSTORE ) ....... –65 to +150°C Power Supply Voltage (VCC) ................. +2.375V to +3.60V Operating Temperature Range (TA) ........... –40°C to +85°C Package Thermal Resistance, Note 3 MLF® (θJA) Still-Air ............................................................. 60°C/W 500lpfm ............................................................ 54°C/W MLF® (ψJB) ......................................................... 33°C/W DC ELECTRICAL CHARACTERISTICS(Note 5) TA= –40°C to +85°C Symbol Parameter Condition Min VCC Power Supply Voltage ICC Power Supply Current Max. VCC, no load VIH Input HIGH Voltage IN, /IN VIL Input LOW Voltage IN, /IN VIN Input Voltage Swing VDIFF_IN Differential Input Voltage RIN In to VT Resistance VREF-AC Output Reference Voltage Typ Max Units 3.60 V 90 mA VCC–1.2 VCC V 0 VIH–0.1 V IN, /IN; see Figure 1a 0.1 1.7 V IN, /IN; see Figure 1b 0.2 3.4 V 2.375 75 40 50 60 Ω VCC –1.3 VCC –1.2 VCC –1.1 V 1.28 V Max Units IN to VT LVPECL DC ELECTRICAL CHARACTERISTICS(Note 5) VCC = 3.3V ±10% or VCC = 2.5 ±5%; RL= 50Ω to VCC–2V; TA= –40°C to 85°C, unless otherwise stated. Symbol Parameter Condition Min Typ VOH Output HIGH Voltage Q0, /Q0, Q1, /Q1 VCC–1.145 VCC–1.020 VCC–0.895 V VOL Output LOW Voltage Q0, /Q0, Q1, /Q1 VCC–1.545 VCC–1.420 VCC–1.295 V VOUT Output Voltage Swing Q0, /Q0, Q1, /Q1; see Figure 1a 200 400 mV VDIFF_OUT Differential Output Voltage Swing Q0, /Q0, Q1, /Q1; see Figure 1b 400 800 mV 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 ratings conditions for extended periods may affect device reliability. Note 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. Note 3. Thermal performance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB. Note 4. Due to the limited drive capability, use for input of the same package only. Note 5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. M9999-020207 [email protected] or (408) 955-1690 3 Precision Edge® SY58013U Micrel, Inc. AC ELECTRICAL CHARACTERISTICS(Note 7) VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C; RL = 50Ω to VCC–2V, unless otherwise stated. Symbol Parameter Condition fMAX Maximum Operating Frequency Min NRZ Data VOUT ≥ 200mV tpd Propagation Delay VIN ≥ 100mV tCHAN Channel-to-Channel Skew Note 8 tSKEW Part-to-Part Skew tJITTER Data Max 10 Gbps 6 GHz 250 ps 4 15 ps Note 9 100 ps Random Jitter (RJ) Deterministic Jitter (DJ) Note 10 Note 11 1 10 psRMS psPP Cycle-to-Cycle Jitter Total Jitter (TJ) Note 12 Note 13 1 10 psRMS psPP 80 ps Output Rise/Fall Time 100 Units 180 Clock tr, tf Clock Typ 20% to 80%, at full output swing 20 50 Note 7. High frequency AC electricals are guaranteed by design and characterization. Note 8. Skew is measured between outputs of the same bank under identical transitions. Note 9. Skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective inputs. Note 10. RJ is measured with a K28.7 comma detect character pattern, measured at 10.7Gbps and 2.5Gbps/3.2Gbps. Note 11. DJ is measured at 10.7Gbps and 2.5Gbps/3.2Gbps with both K28.5 and 223–1 PRBS pattern Note 12. Cycle-to-cycle jitter definition: The variation of periods between adjacent cycles, Tn–Tn–1 where T is the time between rising edges of the output signal. Note 13. Total jitter definition: With an ideal clock input of frequency ≤ fMAX, no more than one output edge in 1012 output edges will deviate by more than the specified peak-to-peak jitter value. TIMING DIAGRAM /IN IN /Q Q tpd SINGLE-ENDED AND DIFFERENTIAL SWINGS VIN, VOUT (Typ. 400mV) VDIFF_IN, VDIFF_OUT (Typ. 800mV) Figure 1b. Differential Voltage Swing Figure 1a. Single-Ended Voltage Swing M9999-020207 [email protected] or (408) 955-1690 4 Precision Edge® SY58013U Micrel, Inc. TYPICAL OPERATING CHARACTERISTICS VCC = 3.3V, GND = 0, VIN = 100mV, TA = 25°C, unless otherwise stated. Frequency vs. Amplitude 10 WITHIN-DEVICE SKEW (ps) AMPLITUDE (mV) 450 400 350 300 250 0 1000 2000 3000 4000 5000 6000 Within-Device Skew vs. Temperature 9 8 7 6 5 4 3 2 1 0 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) FREQUENCY (MHz) Propagation Delay vs. Input Voltage Swing Propagation Delay vs. Temperature PROPAGATION DELAY (ps) PROPAGATION DELAY (ps) 190 185 180 175 170 165 160 155 0 200 400 600 800 1000 INPUT VOLTAGE SWING (V) M9999-020207 [email protected] or (408) 955-1690 5 195 190 185 180 175 170 165 160 155 150 145 140 135 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Precision Edge® SY58013U Micrel, Inc. FUNCTIONAL CHARACTERISTICS VCC = 3.3V, VEE = 0V, VIN = 100mV, TA = 25°C, unless otherwise stated. 5GHz Output Output Swing (100mV/div.) Output Swing (100mV/div.) 200MHz Output TIME (25ps/div.) 7GHz Output 10.7Gbps Output Output Swing (100mV/div.) Output Swing (100mV/div.) TIME (600ps/div.) TIME (25ps/div.) TIME (20ps/div.) (223–1 PRBS Pattern) M9999-020207 [email protected] or (408) 955-1690 6 Precision Edge® SY58013U Micrel, Inc. INPUT STAGE VCC IN GND 50Ω VT 50Ω /IN Figure 2. Simplified Differential Input Buffer INPUT INTERFACE APPLICATIONS VCC VCC VCC VCC IN IN IN LVPECL LVPECL SY58013U NC Rpd SY58013U VT Figure 3a. DC-Coupled LVPECL Input Interface 0.01µF Figure 3b. AC-Coupled LVPECL Input Interface VCC VCC IN IN CML CML /IN /IN SY58013U SY58013U VT NC VT NC VREF-AC VREF-AC 0.01µF VCC Figure 3d. DC-Coupled CML Input Interface Figure 3e. AC-Coupled CML Input Interface (option: may connect VT to VCC) M9999-020207 [email protected] or (408) 955-1690 VT NC VREF-AC VCC Note: For VCC = 2.5V, Rpd = 50Ω For VCC = 3.3V, Rpd = 100Ω VCC VCC NC VREF-AC VREF-AC Note: For VCC = 2.5V system, Rpd = 19Ω For VCC = 3.3V system, Rpd = 50Ω /IN SY58013U Rpd VT Rpd LVDS /IN /IN 0.01µF VCC VCC 7 Figure 3c. LVDS Input Interface Precision Edge® SY58013U Micrel, Inc. OUTPUT TERMINATION RECOMMENDATIONS LVPECL outputs have very low output impedance (open emitter), and small signal swing which results in low EMI (electro-magnetic interference). The LVPECL is ideal for driving 50Ω and 100Ω controlled impedance transmission lines. In addition, LVPECL is compatible for driving standard PECL inputs since PECL inputs require only 100mV input swing. Further, there are several techniques in terminating the LVPECL outputs, as shown in Figure 5 through 7. +3.3V +3.3V ZO = 50Ω R1 130Ω +3.3V +3.3V R1 130Ω +3.3V Q +3.3V R1 130Ω R1 130Ω VT = VCC —1.3V R4 +3.3V 1kΩ ZO = 50Ω ZO = 50Ω /Q R3 1.6kΩ VT = VCC —2V R2 82Ω R2 82Ω R2 82Ω VT = VCC —2V R2 82Ω Figure 7. Terminating Unused I/O Figure 5. Parallel Termination–Thevenin Equivalent Note 1. Note 2. Note 1. Note 2. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω For +3.3V systems: R1 = 130Ω, R2 = 82Ω +3.3V +3.3V Z = 50Ω Note 3. Unused output (/Q) must be terminated to balance the output. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω, R3 = 1.25kΩ, R4 = 1.2kΩ. For +3.3V systems: R1 = 130Ω, R2 = 82Ω, R3 = 1kΩ, R4 = 1.6kΩ. Unused output pairs (Q and /Q) may be left floating. Z = 50Ω 50Ω 50Ω source destination 50Ω Rb C1 0.01µF (optional) Figure 6. Three-Resistor “Y–Termination” Note 1. Note 2. Note 3. Note 4. Power-saving alternative to Thevenin termination. Place termination resistors as close to destination inputs as possible. Rb resistor sets the DC bias voltage, equal to VT. For +2.5V systems Rb = 39Ω. For +3.3V systems Rb = 46Ω to 50Ω. C1 is an optional bypass capacitor intended to compensate for any tr/tf mismatches. RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION Part Number Function Data Sheet Link SY58011U 7GHz, 1:2 CML Fanout Buffer/Translator With Internal I/O Termination http://www.micrel.com/product-info/prod/ucts/sy58011u.shtml SY58012U 5GHz, 1:2 LVPECL Fanout Buffer/Translator With Internal Input Termination http://www.micrel.com/product-info/products/sy58012u.shtml SY58013U 6GHz, 1:2 Fanout Buffer/Translator w/400mV LVPECL Outputs and Internal Input Termination http://www.micrel.com/product-info/products/sy58013u.shtml 16-MLF™ Manufacturing Guidelines Exposed Pad Application Note www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf HBW Solutions http://www.micrel.com/product-info/as/solutions.shtml M-0317 M9999-020207 [email protected] or (408) 955-1690 8 Precision Edge® SY58013U Micrel, Inc. 16-PIN 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 (Always solder, or equivalent, the exposed pad to the PCB) Package Notes: Note 1. Package meets Level 2 qualification. Note 2. All parts are dry-packaged before shipment. Note 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 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. © 2005 Micrel, Incorporated. M9999-020207 [email protected] or (408) 955-1690 9