SY56034AR Low Voltage 1.2V/1.8V/2.5V 2:6 MUX with Crosspoint Capability 5GHz/6.4Gbps General Description The SY56034AR is a fully differential, low voltage 1.2V/1.8V/2.5V CML 2:6 (2+4) MUX with crosspoint capability. The SY56034AR can process clock signals as fast as 5GHz or data patterns up to 6.4Gbps. The differential input includes Micrel’s unique, 3-pin input termination architecture that interfaces to LVPECL, LVDS or CML differential signals as small as 100mV (200mVpp) without any level-shifting or termination resistor networks in the signal path. For AC-coupled input interface applications, an internal voltage reference is provided to bias the VT pin. The outputs are 400mV CML, with extremely fast rise/fall times guaranteed to be less than 80ps. The SY56034AR operates from a 2.5V ±5% core supply and a 1.2V/1.8V/2.5V ±5% output supply and is guaranteed over the full industrial temperature range (–40°C to +85°C). The SY56034AR 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. Functional Block Diagram Precision Edge Features • 1.2V/1.8V/2.5V CML 2:6 (2+4) MUX with Crosspoint Capability • Guaranteed AC performance over temperature and voltage: – DC-to- > 6.4Gbps throughput – <300ps propagation delay (IN-to-Q) – <25ps Output skew – <80ps rise/fall times • Ultra-low jitter design – <1psRMS cycle-to-cycle jitter – <10psPP total jitter – <1psRMS random jitter – <10psPP deterministic jitter • High-speed CML outputs • 2.5V ±5% , 1.2V/1.8V/2.5V ±5% power supply operation • Industrial temperature range: –40°C to +85°C ® • Available in 32-pin MLF package Applications • • • • Data Distribution: OC-48, OC-48+FEC SONET clock and data distribution Fibre Channel clock and data distribution Gigabit Ethernet clock and data distribution Markets • • • • • • • Storage ATE Test and measurement Enterprise networking equipment High-end servers Access Metro area network equipment Precision Edge is a registered trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology. Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com September 2008 ® M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Ordering Information(1) Part Number SY56034ARMG SY56034ARMGTR (2) Package Type Operating Range Package Marking Lead Finish MLF-32 Industrial 56034AR with Pb-Free bar-line indicator NiPdAu Pb-Free MLF-32 Industrial 56034AR with Pb-Free bar-line indicator NiPdAu Pb-Free Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC Electricals only. 2. Tape and Reel. Pin Configuration ® ® 32-Pin MLF (MLF -32) Truth Table SEL0 SEL1 Bank1 Bank2 L L IN0 IN0 L H IN0 IN1 H L IN1 IN0 H H IN1 IN1 September 2008 2 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Pin Description Pin Number Pin Name 2,3 IN0, /IN0 6,7 IN1,/IN1 1 VT0 8 VT1 4 SEL0 5 SEL1 10, 31 VCC Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the VCC pin as possible. Supplies input and core circuitry. 11,16,18, VCCO Output Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the VCCO pins as possible. Supplies the output buffer. 23,25,30 9,17,24,32 GND, Exposed pad 29,28 Q0, /Q0 27,26 Q1, /Q1 22,21 Q2, /Q2 20,19 Q3, /Q3 15,14 Q4, /Q4 13,12 Q5, /Q5 September 2008 Pin Function Differential Inputs: These input pairs are the differential signal inputs to the device. They accept differential signals as small as 100mV (200mVPP). Each input pin internally terminates with 50Ω to the VT pin. Input Termination Center-Tap: Each side of the differential input pair terminates to a VT pin. This pin provides a center-tap to a termination network for maximum interface flexibility. An internal high impedance resistor divider biases VT to allow input AC-coupling. For AC-coupling, bypass VT with a 0.1µF low ESR capacitor to VCC. See “Interface Applications” subsection and Figure 2a. These single-ended TTL/CMOS-compatible inputs select the inputs to the crosspoint switch. Note that each of these inputs is internally connected to a 25kΩ pull-up resistor and will default to a logic HIGH state if left open. Ground: Exposed pad must be connected to a ground plane that is the same potential as the ground pin. CML Differential Output Pairs: Differential buffered copy of the selected input signal. The output swing is typically 390mV. See “Interface Applications” subsection for termination information. Output pairs Q0 to Q3 belong to Bank 1. Q4 and Q5 belong to Bank 2. 3 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Absolute Maximum Ratings(1) Operating Ratings(2) Supply Voltage (VCC) ............................... –0.5V to +3.0V Supply Voltage (VCCO) ............................. –0.5V to +2.7V VCC - VCCO ...............................................................<1.8V VCCO - VCC ...............................................................<0.5V Input Voltage (VIN) ............................–0.5V to VCC + 0.5V CML Output Voltage (VOUT) ................0.6V to VCCO+0.5V Current (VT) Source or sink current on VT pin .................±100mA Input Current Source or sink current on (IN, /IN) .................±50mA Maximum operating Junction Temperature .......... 125°C Lead Temperature (soldering, 20sec.) .................. 260°C Storage Temperature (Ts) ....................–65°C to +150°C Supply Voltage (VCC) ..........................2.375V to 2.625V (VCCO) ..........................1.14V to 2.625V Ambient Temperature (TA) ................... –40°C to +85°C (3) Package Thermal Resistance ® MLF Still-air (θJA) ............................................ 50°C/W Junction-to-board (ψJB) ......................... 20°C/W DC Electrical Characteristics(4) TA = –40°C to +85°C, unless otherwise stated. Symbol Parameter Condition VCC Power Supply Voltage Range VCC VCCO VCCO VCCO Min Typ Max Units 2.375 1.14 1.7 2.375 2.5 1.2 1.8 2.5 2.625 1.26 1.9 2.625 V V V V ICC Power Supply Current ICCO Power Supply Current Max. VCC 100 140 mA No Load. Max VCCO 96 126 mA RIN Input Resistance (IN-to-VT, /IN-to-VT ) 45 50 55 Ω RDIFF_IN Differential Input Resistance (IN-to-/IN) 90 100 110 Ω VIH Input HIGH Voltage (IN, /IN) IN, /IN 1.2 VCC V VIL Input LOW Voltage (IN, /IN) VIL with VIH = 1.2V 0.2 VIH–0.1 V VIH Input HIGH Voltage (IN, /IN) IN, /IN 1.14 VCC V VIL Input LOW Voltage (IN, /IN) VIL with VIH = 1.14V (1.2V-5%) 0.66 VIH–0.1 V VIN Input Voltage Swing (IN, /IN) see Figure 3a 0.1 1.0 V VDIFF_IN Differential Input Voltage Swing (|IN - /IN|) see Figure 3b 0.2 2.0 V VT_IN Voltage from Input to VT 1.28 V Notes: 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. 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 3. Package thermal resistance assumes exposed pad is soldered (or equivalent) to the device's most negative potential on the PCB. ψJB and θJA values are determined for a 4-layer board in still-air number, unless otherwise stated. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 4. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. September 2008 4 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR CML Outputs DC Electrical Characteristics(5) VCCO = 1.14V to 1.26V, RL = 50Ω to VCCO, VCCO = 1.7V to 1.9V, 2.375V to 2.625V, RL = 50Ω to VCCO or 100Ω across the outputs. VCC = 2.375V to 2.625V. TA = –40°C to +85°C, unless otherwise stated. Symbol Parameter Condition Min Typ Max Units VOH Output HIGH Voltage RL = 50Ω to VCCO VCCO-0.020 VCCO-0.010 VCCO V VOUT Output Voltage Swing See Figure 3a 300 390 475 mV VDIFF_OUT Differential Output Voltage Swing ROUT Output Source Impedance See Figure 3b 600 780 950 mV 45 50 55 Ω Min Typ Max Units LVTTL/CMOS DC Electrical Characteristics(5) VCC = 2.5V ±5%. TA = –40°C to +85°C, unless otherwise stated. Symbol Parameter Condition VIH Input HIGH Voltage VIL Input LOW Voltage IIH Input HIGH Current -125 IIL Input LOW Current -300 2.0 VCC V 0.8 V 30 µA µA Note: 5. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. September 2008 5 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR AC Electrical Characteristics VCCO = 1.14V to 1.26V, RL = 50Ω to VCCO, VCCO = 1.7V to 1.9V, 2.375V to 2.625V, RL = 50Ω to VCCO or 100Ω across the outputs. VCC = 2.375V to 2.625V. TA = –40°C to +85°C, unless otherwise stated. Symbol Parameter Condition Min fMAX Maximum Frequency NRZ Data 6.4 Gbps 5 GHz VOUT > 200mV tPD Propagation Delay tSkew tJitter Clock Typ Max Units IN-to-Q Figure 1 150 220 300 ps SEL-to-Q Figure 1 100 200 300 ps Input-to-Input Skew Note 6 5 15 ps Output-to-Output skew Note 7, All Outputs or Q0-Q3 7 25 ps Output-to-Output skew Note 7, Q4-Q5 4 20 ps Part-to-Part Skew Note 8 75 ps Data Random Jitter Note 9 1 psRMS Deterministic Jitter Note 10 10 psPP Cycle-to-Cycle Jitter Note 11 1 psRMS Total Jitter Note 12 10 psPP Note 13 0.7 psPP 80 ps Clock Crosstalk Induced Jitter (Adjacent Channel) tR, tF Output Rise/Fall Times (20% to 80%) Duty Cycle At full output swing. 20 60 ≤4GHz Differential I/O 47 53 % <5GHz Differential I/O 45 55 % Notes: 6. Input-to-Input skew is the difference in time between both inputs, measured at the same output, for the same temperature, voltage and transition. 7. Output-to-Output skew is the difference in time between both outputs, receiving data from the same input, for the same temperature, voltage and transition. 8. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and no skew at the edges at the respective inputs. 9. Random jitter is measured with a K28.7 pattern, measured at ≤ fMAX. 10. Deterministic jitter is measured at 2.5Gbps with both K28.5 and 223–1 PRBS pattern. 11. Cycle-to-cycle jitter definition: the variation period between adjacent cycles over a random sample of adjacent cycle pairs. tJITTER_CC = Tn –Tn+1, where T is the time between rising edges of the output signal. 12. Total jitter definition: with an ideal clock input frequency of ≤ fMAX (device), no more than one output edge in 1012 output edges will deviate by more than the specified peak-to-peak jitter value. 13. Crosstalk-induced jitter is defined as the added jitter that results from signals applied to the adjacent channel. It is measured at the output while applying a similar, differential clock frequency to both inputs that is asynchronous with respect to each other. September 2008 6 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Interface Applications For Input Interface Applications, see Figures 4a through 4f. For CML Output Termination, see Figures 5a through Figure 5d. CML Output Termination with VCCO 1.8V, 2.5V For VCCO of 1.8V or 2.5V, Figure 5a and Figure 5b, terminate with either 50Ω-to-1.8V or 100Ω differentially across the outputs. AC- or DC-coupling is fine. See Figure 5c for AC-coupling. CML Output Termination with VCCO 1.2V For VCCO of 1.2V, Figure 5a, terminate the output with 50Ω-to-1.2V, DC coupled, not 100Ω differentially across the outputs. If AC-coupling is used, Figure 5d, terminate into 50Ωto-1.2V before the coupling capacitor and then connect to a high value resistor to a reference voltage. Do not AC couple with internally terminated receiver. For example, 50Ω ANY-IN input. AC-coupling will offset the output voltage by 200mV and this offset voltage will be too low for proper driver operation. Any unused output pair needs to be terminated when VCCO is 1.2V, do not leave floating. Input AC-Coupling The SY56034AR input can accept AC-coupling from any driver. Bypass VT with a 0.1µF low ESR capacitor to VCC as shown in Figures 4c and 4d. VT has an internal high impedance resistor divider as shown in Figure 2a, to provide a bias voltage for AC-coupling. Timing Diagrams Figure 1. Propagation Delay September 2008 7 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Typical Characteristics VCC = 2.5V, VCCO =1.2V, GND = 0V, VIN = 100mV, RL = 50Ω to 1.2V, TA = 25°C, unless otherwise stated. September 2008 8 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Functional Characteristics VCC = 2.5V, VCCO =1.2V, GND = 0V, VIN = 400mV, RL = 50Ω to 1.2V, TA = 25°C, unless otherwise stated. September 2008 9 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Input and Output Stage Figure 2b. Simplified CML Output Buffer Figure 2a. Simplified Differential Input Buffer Single-Ended and Differential Swings Figure 3a. Single-Ended Swing September 2008 Figure 3b. Differential Swing 10 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Input Interface Applications Figure 4a. CML Interface (DC-Coupled, 1.8V, 2.5V) Option: VT may be connected to VCC Figure 4b. CML Interface (DC-Coupled, 1.2V) Figure 4d. LVPECL Interface (AC-Coupled) Figure 4e. LVPECL Interface (DC-Coupled) September 2008 11 Figure 4c. CML Interface (AC-Coupled) Figure 4f. LVDS Interface M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR CML Output Termination Figure 5a. 1.2V 1.8V or 2.5V CML DC-Coupled Termination Figure 5b. 1.8V or 2.5V CML DC-Coupled Termination Figure 5c. CML AC-Coupled Termination (VCCO 1.8V or 2.5V only) Figure 5d. CML AC-Coupled Termination (VCCO 1.2V only) Related Product and Support Documents Part Number Function Datasheet Link HBW Solutions New Products and Termination Application Notes http://www.micrel.com/page.do?page=/productinfo/as/HBWsolutions.shtml September 2008 12 M9999-093008-A [email protected] or (408) 955-1690 Micrel, Inc. SY56034AR Package Information ® 32-Pin MLF (5mm x5mm) (MLF-32) 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 a Purchaser’s own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. © 2008 Micrel, Incorporated. September 2008 13 M9999-093008-A [email protected] or (408) 955-1690