ULTRA-PRECISION DIFFERENTIAL 400mV LVPECL LINE DRIVER/RECEIVER WITH INTERNAL TERMINATION Micrel, Inc. Precision Edge® SY58602U ® Precision Edge SY58602U FEATURES ■ Guaranteed AC performance over temperature and voltage: • DC-to >10.7Gbps data rate throughput • DC-to >7GHz clock fMAX • <250ps In-to-Out tpd • tr / tf <70ps Precision Edge® DESCRIPTION The SY58602U is a 2.5V/3.3V precision, high-speed, differential receiver capable of handling clocks up to 7GHz and data streams up to 10.7Gbps. The differential input includes Micrel’s unique, 3-pin input termination architecture that allows users to interface to any differential signal (AC- or DC-coupled) as small as 200mVpp without any level shifting or termination resistor networks in the signal path. The outputs are 400mV LVPECL, with extremely fast rise/fall times guaranteed to be less than 70ps. The SY58602U operates from a +2.5V ±5% supply or a +3.3V ±10% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. For applications that require CML outputs, consider the SY58600U or for 800mV LVPECL outputs the SY58601U. The SY58602U is part of Micrel’s high-speed, Precision Edge® product line. All support documentation can be found on Micrel’s web site at: www.micrel.com. ■ Ultra low-jitter design: • <1psRMS random jitter • <10psPP deterministic jitter • <10psPP total jitter (clock) ■ Minimum input swing 200mV (|IN–/IN|) ■ Unique, patent-pending input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS) ■ Typical 400mV LVPECL output swing ■ Power supply 2.5V ±5% or 3.3V ±10% ■ –40°C to 85°C industrial temperature range ■ Available in an ultra-small (2mm × 2mm) 8-pin MLF® package APPLICATIONS ■ ■ ■ ■ Backplane buffering OC-12 to OC-192 SONET/SDN clock/data distribution All Gigabit Ethernet distribution Fibre Channel distribution TYPICAL APPLICATION FUNCTIONAL BLOCK DIAGRAM IN Backplane 50Ω VT Q 50Ω /Q SY58602U 100mV Input Swing 400mV Output Swing /IN VREF-AC 400mV 100mV Input Waveform Output Waveform Precision Edge is a registered trademark of Micrel, Inc. MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc. M9999-022007 [email protected] or (408) 955-1690 Rev.: C 1 Amendment: /0 Issue Date: February 2007 Precision Edge® SY58602U Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information(1) IN 1 VT 2 VREF-AC 3 Operating Range SY58602UMITR(2) MLF-8 Industrial 602 Sn-Pb SY58602UMGTR(2, 3) MLF-8 Industrial 602 with Pb-Free bar-line indicator Pb-Free NiPdAu Part Number 7 Q 6 /Q /IN 4 Package Type 8 VCC 5 GND 8-Pin MLF® (MLF-8) Package Marking Lead Finish 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 2 VT Input Termination Center-Tap: Each side of the differential input pair terminates to this pin. The VT pin provides a center-tap to a termination network for maximum interface flexibility. See “Input Interface Applications” section for more details. 3 VREF-AC Reference Output Voltage: This output biases to VCC –1.2V. Connect to VT pin when ACcoupling the input. Bypass with 0.01µF low ESR capacitor to VCC. Maximum current source or sink is 0.5mA. See “Input Interface Applications” section. 8 VCC Positive Power Supply. Bypass with 0.1µF||0.01µF low ESR capacitors as close to the VCC pin as possible. 7, 6 Q, /Q Differential 100K LVPECL Output: This LVPECL output is the output of the device Terminate through 50Ω to VCC –2.0V. See “Output Interface Applications” section. 5 GND, Exposed M9999-022007 [email protected] or (408) 955-1690 Pin Function Differential Input: This input pair is the signal to be buffered. These inputs accept AC or DCcoupled signals as small as 100mV. Each pin of this pair internally terminates to a VT pin through 50Ω. Note that this input will default to an indeterminate state if left open. Please refer to the “Input Interface Applications” section for more details. Ground. Ground pin and exposed pad must be connected to the same ground plane. 2 Precision Edge® SY58602U Micrel, Inc. Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VCC) .................................. –0.5V to +4.0V Input Voltage (VIN) ......................................... –0.5V to VCC LVPECL Output Current (IOUT) Continuous ............................................................. 50mA Surge .................................................................... 100mA Termination Current Source or Sink Current on VT .................................... ±100mA Input Current Source or Sink Current on IN, /IN ........................ ±50mA Current (VREF)(3) Source or Sink Current on VREF–AC ......................... ±1.5mA Lead Temperature (soldering, 20 sec.) ................... +260°C Storage Temperature (TS) ....................... –65°C to +150°C Supply Voltage (VCC) ...................... +2.375V to +2.625V or ............................................................ +3.0V to +3.6V Ambient Temperature (TA) ......................... –40°C to +85°C Package Thermal Resistance(4) MLF™ (θJA) Still-Air ............................................................. 93°C/W MLF™ (ψJB) Junction-to-Board ............................................ 32°C/W DC ELECTRICAL CHARACTERISTICS(5) TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter Condition Min Typ Max Units VCC Power Supply VCC = 2.5V. VCC = 3.3V. 2.375 3.0 2.5 3.3 2.625 3.6 V V ICC Power Supply Current No Load, max. VCC, Note 6 48 65 mA RDIFF_IN Differential Input Resistance (IN-to-/IN) 80 100 120 Ω RIN Input Resistance (IN-to-VT, /IN-to-VT) 40 50 60 Ω VIH Input HIGH Voltage (IN, /IN) VCC –1.2 VCC V VIL Input LOW Voltage (IN, /IN) 0 VIH –0.1 V VIN Input Voltage Swing (IN, /IN) See Figure 1a. 0.1 1.7 V VDIFF_IN Differential Input Voltage Swing |IN–, /IN| See Figure 1b. 0.2 3.4 V VT_IN In-to-VT (IN, /IN) 1.28 V VREF–AC Output Reference Voltage VCC –1.3 VCC –1.2 VCC –1.1 V Notes: 1. Permanent device damage may occur if the ratings in “Absolute Maximum Ratings” section are exceeded. This is a stress rating only and functional operation is not implied for 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. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Due to the limited drive capability use for input of the same package only. 4. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the devices most negative potential on the PCB. ψJB uses 4-layer θJA in still-air, unless otherwise stated. 5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 6. Includes current through internal 50Ω pull-ups. M9999-022007 [email protected] or (408) 955-1690 3 Precision Edge® SY58602U Micrel, Inc. LVPECL OUTPUTS DC ELECTRICAL CHARACTERISTICS(8) VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C; RL = 50Ω to VCC–2V, unless otherwise noted. Symbol Parameter Condition Min Typ Max Units VOH Output HIGH Voltage Q, /Q VCC–1.145 VCC–0.895 V VOL Output LOW Voltage Q, /Q VCC–1.545 VCC–1.295 mV VOUT Output Voltage Swing Q, /Q See Figure 1a. 200 400 mV VDIFF_OUT Differential Output Voltage Swing Q, /Q See Figure 1b. 400 800 mV AC ELECTRICAL CHARACTERISTICS(9) VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C; RL = 50Ω to VCC–2V, unless otherwise noted. Symbol Parameter Condition Min fMAX Maximum Operating Frequency VOUT ≥ 400mV NRZ Data Clock tpd Propagation Delay IN-to-Q VIN ≥ 100mV Data Clock tr, tf Max Units 10.7 Gbps 7 GHz 70 tpd Tempco Differential Propagation Delay Temperature Coefficient tJITTER Typ 125 220 115 ps fs/°C Random Jitter (RJ) Note 10 1 psRMS Deterministic Jitter (DJ) Note 11 10 psPP Cycle-to-Cycle Jitter Note 12 1 psRMS Total Jitter (TJ) Note 13 10 psPP 70 ps Output Rise/Fall Times Q, /Q (20% to 80%) At full output swing. 20 40 Notes: 8. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 9. High-frequency AC electricals are guaranteed by design and characterization. 10. Random jitter is measured with a K28.7 comma detect character pattern, measured at 2.5Gbps/3.2Gbps. 11. Deterministic jitter is measured at 2.5Gbps/3.2Gbps with both K28.5 and 223–1 PRBS pattern. 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. 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. M9999-022007 [email protected] or (408) 955-1690 4 Precision Edge® SY58602U Micrel, Inc. TIMING DIAGRAM IN /IN tpd Q /Q DEFINITION OF SINGLE-ENDED AND DIFFERENTIAL SWINGS VDIFF_IN, VDIFF_OUT 800mV (typical) VIN, VOUT 400mV (typical) Figure 1a. Single-Ended Swing Figure 1b. Differential Swing INPUT AND OUTPUT STAGE INTERNAL TERMINATION VCC VCC IN 50Ω VT /Q 50Ω /IN GND Q Figure 2a. Simplified Differential Input Stage M9999-022007 [email protected] or (408) 955-1690 Figure 2b. Simplified Differential Output Stage 5 Precision Edge® SY58602U Micrel, Inc. TYPICAL OPERATING CHARACTERISTICS VCC = 3.3V, GND = 0, VIN = 800mV. 200MHz Clock Output Swing (100mV/div.) Output Swing (100mV/div.) 7GHz Clock TIME (20ps/div.) OC-12 Mask 223–1 PRBS 1xFC Mask 223–1 PRBS Output Swing (100mV/div.) Output Swing (100mV/div.) TIME (500ps/div.) TIME (200ps/div.) 2xFC Mask 223–1 PRBS OC-48 Mask 223–1 PRBS Output Swing (100mV/div.) Output Swing (100mV/div.) TIME (300ps/div.) TIME (100ps/div.) M9999-022007 [email protected] or (408) 955-1690 TIME (100ps/div.) 6 Precision Edge® SY58602U Micrel, Inc. TYPICAL OPERATING CHARACTERISTICS CONT'D VCC = 3.3V, GND = 0, VIN = 800mV. Output Swing (100mV/div.) OC-192 Mask 223–1 PRBS Output Swing (100mV/div.) 2xGBE Mask 223–1 PRBS TIME (100ps/div.) M9999-022007 [email protected] or (408) 955-1690 TIME (20ps/div.) 7 Precision Edge® SY58602U Micrel, Inc. INPUT INTERFACE APPLICATIONS VCC VCC VCC IN LVPECL IN IN /IN /IN VCC SY58602U GND GND VT NC VREF-AC Figure 3b. CML Interface (AC-Coupled) Option: VT may be connected to VCC. VCC VCC IN LVPECL IN /IN RP RP GND VCC SY58602U LVDS /IN 0.1µF SY58602U VT GND VREF-AC Note: For 3.3V, RP = 100Ω. For 2.5V, RP = 50Ω. Figure 3d. LVPECL Interface (AC-Coupled) M9999-022007 [email protected] or (408) 955-1690 GND NC VT NC VREF-AC Figure 3e. LVDS Interface 8 NC RP VREF-AC Figure 3a. CML Interface (DC-Coupled) VT SY58602U 0.1µF SY58602U 0.1µF GND VT NC /IN VCC CML CML VREF-AC Note: For 3.3V, RP = 50Ω. For 2.5V, RP = 19Ω. Figure 3c. LVPECL Interface (DC-Coupled) Precision Edge® SY58602U Micrel, Inc. OUTPUT INTERFACE APPLICATIONS +3.3V +3.3V R1 130Ω R1 130Ω Z0 = 50Ω +3.3V +3.3V Z0 = 50Ω Z0 = 50Ω R2 82Ω GND +3.3V Z0 = 50Ω R2 82Ω 50Ω 50Ω VCC GND GND GND C (optional) 0.01µF 50Ω GND GND Figure 4b. Parallel Termination (3-Resistor) Figure 4a. Parallel Thevenin-Equivalent Termination RELATED PRODUCT AND SUPPORT DOCUMENTATION Part Number Function Data Sheet Link SY58600U Ultra-Precision Differential 400mV CML Line Driver/Receiver with Internal Termination www.micrel.com/product-info/products/sy58600u.shtml SY58601U Ultra-Precision Differential 800mV LVPECL Line Driver/Receiver with Internal Termination www.micrel.com/product-info/products/sy58601u.shtml MLF™ Application Note www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf New Products and Applications www.micrel.com/product-info/products/solutions.shtml HBW Solutions M9999-022007 [email protected] or (408) 955-1690 9 Precision Edge® SY58602U Micrel, Inc. 8-PIN ULTRA-SMALL EPAD MicroLeadFrame® (MLF-8) Package EP- Exposed Pad Die CompSide Island Heat Dissipation Heat Dissipation VEE Heavy Copper Plane VEE Heavy Copper Plane PCB Thermal Consideration for 8-Pin MLF® Package (Always solder, or equivalent, the exposed pad to the PCB) Package Notes: 1. Package meets Level 2 qualification. 2. All parts 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 USA TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB 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. M9999-022007 [email protected] or (408) 955-1690 10