ULTRA-PRECISION DIFFERENTIAL CML LINE DRIVER/RECEIVER WITH INTERNAL TERMINATION Micrel, Inc. Precision Edge® SY58600U ® Precision Edge SY58600U FEATURES ■ Guaranteed AC performance over temperature and voltage: • DC-to >10.7Gbps data rate throughput • DC-to >7GHz clock fMAX • <220ps in-to-out tpd • tr / tf <60ps Precision Edge® DESCRIPTION The SY58600U 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 CML, with extremely fast rise/fall times guaranteed to be less than 60ps. The SY58600U 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 800mV LVPECL outputs, consider the SY58601U or for 400mV LVPECL outputs the SY58602U. The SY58600U 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 • <10ps total jitter (clock) PP ■ Minimum input swing 200mV (|IN–/IN|) ■ Unique, patent-pending input termination and VT pin accepts DC-coupled and AC-coupled inputs (CML, PECL, LVDS) ■ Internal 50Ω output source termination ■ Typical 400mV CML 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 SY58600U 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 trademarks of Amkor Technology, Inc. M9999-052505 [email protected] or (408) 955-1690 Rev.: B 1 Amendment: /0 Issue Date: May 2005 Precision Edge® SY58600U Micrel, Inc. PACKAGE/ORDERING INFORMATION Ordering Information(1) IN 1 VT 2 VREF-AC 3 Operating Range SY58600UMITR(2) MLF-8 Industrial 600 Sn-Pb SY58600UMGTR(2, 3) MLF-8 Industrial 600 with Pb-Free bar-line indicator Pb-Free NiPdAu Part Number 7 Q 6 /Q /IN 4 Package Type 8 VCC 5 GND Package Marking Lead Finish Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only. 8-Pin MLF™ (MLF-8) 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 CML Output: Differential buffered output copy of the input signal. The differential output swing is typically 800mV into a 50Ω load, or 100Ω across the pair. See “Output Interface Applications” section. 5 GND, Exposed M9999-052505 [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® SY58600U Micrel, Inc. Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VCC) .................................. –0.5V to +4.0V Input Voltage (VIN) ......................................... –0.5V to VCC CML Output Voltage (VOUT) ......... VCC –1.0V to VCC +0.5V Termination Current(3) Source or Sink Current on VT .................................... ±100mA Input Current Source or Sink Current on IN, /IN ........................ ±50mA Current (VREF) 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 45 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 –1.6 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 Note 7 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 device’s 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. 7. VIH (min) not lower than 1.2V. M9999-052505 [email protected] or (408) 955-1690 3 Precision Edge® SY58600U Micrel, Inc. CML OUTPUTS DC ELECTRICAL CHARACTERISTICS(8) VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C; RL = 100Ω across output pair or equivalent, unless otherwise noted. Symbol Parameter Condition Min Typ VOH Output HIGH Voltage Q, /Q VOUT Output Voltage Swing Q, /Q See Figure 1a. 325 400 mV VDIFF_OUT Differential Output Voltage Swing Q, /Q See Figure 1b. 650 800 mV ROUT Output Source Impedance Q, /Q 40 50 VCC–0.020 VCC–0.010 Max Units VCC V Ω 60 AC ELECTRICAL CHARACTERISTICS(9) VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C; RL = 100Ω across output pair or equivalent, unless otherwise noted. Symbol Parameter Condition fMAX Maximum Operating Frequency Min NRZ Data VOUT ≥ 200mV tpd Propagation Delay tpd Tempco Differential Propagation Delay Temperature Coefficient tJITTER Data Clock tr, tf Clock IN-to-Q Typ Max Units 10.7 Gbps 7 GHz 70 125 220 115 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 60 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. M9999-052505 [email protected] or (408) 955-1690 4 Precision Edge® SY58600U 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 50Ω 50Ω /Q Q IN 50Ω VT 50Ω /IN GND GND Figure 2b. Simplified Differential Output Stage Figure 2a. Simplified Differential Input Stage M9999-052505 [email protected] or (408) 955-1690 5 Precision Edge® SY58600U Micrel, Inc. TYPICAL OPERATING CHARACTERISTICS VCC = 3.3V, GND = 0, VIN = 800mV. 1xGBE Mask 223–1 Output Swing (100mV/div.) Output Swing (100mV/div.) 200MHz Clock OC-12 Mask 223–1 PRBS 2xGBE Mask 223–1 PRBS Output Swing (100mV/div.) TIME (200ps/div.) Output Swing (100mV/div.) TIME (500ps/div.) TIME (100ps/div.) 2xFC Mask 223–1 PRBS OC-192 Mask 223–1 PRBS Output Swing (100mV/div.) Output Swing (100mV/div.) TIME (300ps/div.) TIME (100ps/div.) M9999-052505 [email protected] or (408) 955-1690 TIME (20ps/div.) 6 Precision Edge® SY58600U Micrel, Inc. TYPICAL OPERATING CHARACTERISTICS CONT'D VCC = 3.3V, GND = 0, VIN = 800mV. Output Swing (100mV/div.) 10xGBE Mask 223–1 PRBS TIME (15ps/div.) M9999-052505 [email protected] or (408) 955-1690 7 Precision Edge® SY58600U Micrel, Inc. INPUT INTERFACE APPLICATIONS VCC VCC VCC IN LVPECL IN IN /IN /IN VCC SY58600U GND GND NC VT VREF-AC VREF-AC NC Figure 3a. CML Interface (DC-Coupled) Figure 3b. CML Interface (AC-Coupled) Option: VT may be connected to VCC. VCC VCC IN LVPECL IN /IN RP RP GND VCC SY58600U LVDS /IN 0.1µF SY58600U VT GND VREF-AC Note: For 3.3V, RP = 100Ω. For 2.5V, RP = 50Ω. Figure 3d. LVPECL Interface (AC-Coupled) M9999-052505 [email protected] or (408) 955-1690 VT GND NC VT NC VREF-AC Figure 3e. LVDS Interface 8 NC RP 0.1µF SY58600U 0.1µF GND SY58600U VT /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® SY58600U Micrel, Inc. OUTPUT INTERFACE APPLICATIONS VCC 50Ω VCC 50Ω 50Ω Z0 = 50Ω 50Ω Z0 = 50Ω /Q /Q 50Ω 100Ω Z0 = 50Ω VCC Z0 = 50Ω Q GND Q 50Ω GND Figure 4a. CML DC-Coupled Termination Figure 4b. CML DC-Coupled Termination VCC 50Ω 50Ω Z0 = 50Ω /Q 50Ω VCC –1.2V Z0 = 50Ω 50Ω Q GND Figure 4c. CML AC-Coupled Termination RELATED PRODUCT AND SUPPORT DOCUMENTATION Part Number Function Data Sheet Link SY58601U 2.5V/3.3V 5Gbps Differential 800mV LVPECL Line Driver/Receiver with Internal Termination www.micrel.com/product-info/products/sy58601u.shtml SY58602U 2.5V/3.3V 10.7Gbps Differential 400mV LVPECL www.micrel.com/product-info/products/sy58602u.shtml Line Driver/Receiver with Internal Termination HBW Solutions 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 M9999-052505 [email protected] or (408) 955-1690 9 Precision Edge® SY58600U Micrel, Inc. 8 LEAD 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 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. M9999-052505 [email protected] or (408) 955-1690 10