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| SY56028XR Low Voltage 1.2V/1.8V/2.5V CML 4:1 MUX with 1:2 FANOUT 6.4Gbps with EQUALIZATION . General Description The SY56028XR is a fully differential, low voltage 1.2V/1.8V/2.5V CML 4:1 MUX, with input equalization, and integrated 1:2 Fanout Buffer. The SY56028XR can process clock signals as fast as 4.5GHz or data patterns up to 6.4Gbps. The differential input includes Micrel's unique 3-pin input termination architecture that interfaces to DC-coupled 2.5V/3.3V LVPECL, 1.2V/1.8V/2.5V CML or LVDS differential signals. For AC-coupled input applications, an internal voltage reference is provided for input bias. Input voltages as small as 200mV (400mVpp) are applied before the 9, 18 or 27-inch FR4 transmission line. The SY56028XR operates from a 2.5V 5% core supply and a 1.2V, 1.8V or 2.5V 5% output supply and is guaranteed over the full industrial temperature range (-40C to +85C). The SY56028XR is part of Micrel's high-speed, Precision Edge(R) product line. Data sheets and support documentation can be found on Micrel's web site at: www.micrel.com. Precision Edge(R) Features * 1.2V/1.8V/2.5V CML 4:2 MUX with input equalization. * Guaranteed AC performance over temperature and voltage: - DC-to > 6.4Gbps throughput - <360ps propagation delay (IN-to-Q) - <15ps within-device skew * Ultra-low jitter design - <0.8psRMS random jitter - <10psPP deterministic jitter * 2.5V 5% , 1.8/1.2V 5% power supply operation * Industrial temperature range: -40C to +85C * Available in 32-pin (5mm x 5mm) MLF(R) package Functional Block Diagram Applications * * * * Data Distribution SONET clock and data distribution Fiber Channel clock and data distribution Gigabit Ethernet clock and data distribution 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 April 2010 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Ordering Information(1) Part Number SY56028XRMG SY56028XRMGTR(2) Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals only. 2. Tape and Reel. Package Type MLF-32 MLF-32 Operating Range Industrial Industrial Package Marking SY56028X with Pb-Free bar-line indicator SY56028X with Pb-Free bar-line indicator Lead Finish NiPdAu Pb-Free NiPdAu Pb-Free Pin Configuration 32-Pin MLF(R) (MLF-32) April 2010 2 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Pin Description Pin Number 1,3 5,7 25,27 29,31 2 6 26 30 19 15 18 16,17 10,13,20,23 4,8,9,24,28,32 12,11 22,21 Pin Name IN0, /IN0 IN1, /IN1 IN2, /IN2 IN3, /IN3 VT0 VT1 VT2 VT3 EQ SEL0 SEL1 VCC VCCO GND, Exposed pad Q0, /Q0 Q1, /Q1 Input Termination Center-Tap: Each side of the differential input pair terminates to the 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 0.1F low ESR capacitor to VCC. See "Input Interface Applications" subsection and Figure 2a. Three level input for equalization control. Single-ended TTL/CMOS compatible input selects the inputs to the multiplexer. This input is internally connected to a 25k pull-up resistor and will default to a logic HIGH state if left open. Input logic threshold is VCC/2. See "Truth Table" for select control. Positive Power Supply: Bypass with 0.1uF//0.01uF low ESR capacitors as close to the VCC pin as possible. Supplies the input and core circuitry. Output Supply: Bypass with 0.1uF//0.01uF low ESR capacitors as close to the VCCO pin as possible. Supplies the output buffers. Ground: Exposed pad must be connected to a ground plane that is the same potential as the ground pins. CML Differential Output Pair: Differential buffered copy of the input signal. The output swing is typically 390mV. See "Functional Description" subsection for termination information. Pin Function Differential Inputs: Accepts differential signals as small as 200mV (400mVPP) applied to the input of a 9, 18 or 27 inch 6mil FR4 stripline transmission line. See "Input and Output Stage" section for details of this input. Truth Table EQ Input LOW FLOAT HIGH Equalization FR4 6mil Stripline 9" 18" 27" SEL1 0 0 1 1 SEL0 0 1 0 1 IN0 Input Selected IN1 Input Selected IN2 Input Selected IN3 Input Selected April 2010 3 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Absolute Maximum Ratings(1) Supply Voltage (VCC) ............................... -0.5V to +3.0V Supply Voltage (VCCO) ............................. -0.5V to +3.0V VCC -VCCO ................................................................<1.8V VCCO -VCC ...............................................................<0.5 V Input Voltage (VIN) ............................. -0.5V to VCC+0.4V CML Output Voltage (VOUT) ............................ 0.6V to 3V Current (VT) Source or sink on VT pin .............................100mA Input Current Source or sink Current on (IN, /IN) ................50mA Maximum operating Junction Temperature .......... 125C Lead Temperature (soldering, 20sec.) .................. 260C Storage Temperature (Ts) ....................-65C to +150C Operating Ratings(2) Supply Voltage (Vcc)...........................2.375V to 2.625V (Vcco)........................1.14V to 2.625V Ambient Temperature (TA) ................... -40C to +85C Package Thermal Resistance(3) MLF(R) Still-air (JA) ............................................ 50C/W Junction-to-board (JB) ......................... 20C/W DC Electrical Characteristics(4) TA = -40C to +85C, unless otherwise stated. Symbol VCC Parameter Power Supply Voltage Range Condition VCC VCCO VCCO VCCO ICC ICCO RDIFF_IN VIH VIL VIN VDIFF_IN VT_IN Power Supply Current Power Supply Current Differential Input Resistance (IN-to-/IN) Input HIGH Voltage (IN, /IN) Input LOW Voltage (IN, /IN) Input Voltage Swing (IN, /IN) Differential Input Voltage Swing (|IN - /IN|) Voltage from Input to VT IN, /IN IN, /IN See Figure 3a, Note 5, applied to input of transmission line. See Figure 3b, Note 5, applied to input of transmission line. Max. VCC No Load. VCCO 90 1.2 0 0.2 0.4 Min 2.375 1.14 1.7 2.375 Typ 2.5 1.2 1.8 2.5 110 32 100 Max 2.625 1.26 1.9 2.625 140 42 110 VCC+0.4 VIH-0.2 1.0 2.0 1.28 Units V V V V mA mA V V V V 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. JB and JA values are determined for a four-layer board in still-air number, unless otherwise stated. 4. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 5. VIN (max) is specified when VT is floating. April 2010 4 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR CML Outputs DC Electrical Characteristics(6) VCCO = 1.14V to 1.26V RL = 50 to VCCO. VCCO = 1.7V to 1.9V, 2.375V to 2.625V, RL = 50 to VCCO or 100 across the outputs. VCC = 2.375V to 2.625V; TA = -40C to +85C, unless otherwise stated. Symbol VOH VOUT VDIFF_OUT ROUT Parameter Output HIGH Voltage Output Voltage Swing Differential Output Voltage Swing Output Source Impedance Condition RL = 50 to VCCO See Figure 3a See Figure 3b Min VCC-0.020 300 600 45 Typ VCC-0.010 390 780 50 Max VCC 475 950 55 Units V mV mV LVTTL/CMOS DC Electrical Characteristics(6) VCC = 2.375V to 2.625V; TA = -40C to +85C, unless otherwise stated. Symbol VIH VIL IIH IIL Parameter Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current -125 -300 Condition Min 2.0 Typ Max VCC 0.8 30 Units V V A A Three Level EQ Input DC Electrical Characteristics(6) VCC = 2.375V to 2.625V; TA = -40C to +85C, unless otherwise stated. Symbol VIH VIL IIH IIL Note: 6. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. Parameter Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Condition Min VCC-0.3 0 Typ Max VCC VEE+0.3 400 Units V V A A VIH = VCC VIL = GND -480 April 2010 5 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR AC Electrical Characteristics VCCO = 1.14V to 1.26V RL = 50 to VCCO. VCCO = 1.7V to 1.9V, 2.375V to 2.625V, RL = 50 to VCCO or 100 across the outputs. VCC = 2.375V to 2.625V; TA = -40C to +85C, unless otherwise stated. Symbol fMAX tPD tSkew tJitter tR tF Parameter Maximum Frequency Propagation Delay (IN-to-Q) (SEL-to-Q) Output-to-Output Skew Part-to-Part Skew Data Random Jitter Data Deterministic Jitter Output Rise/Fall Time (20% to 80%) Duty Cycle Notes: 7. 8. 9. Propagation delay is measured with no attenuating transmission line connected to the input. Output-to-Output skew is the difference in time between both outputs under identical input transition, temperature and power supply. 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. 23 Condition NRZ Data VOUT > 200mV (Clock) Note 7, Figure 1a Figure 1b Note 8 Note 9 Note 10 Note 11 At full output swing. Differential I/O Min 6.4 4.5 210 Typ Max Units Gbps GHz 280 3 360 1 15 100 0.8 10 ps ns ps ps psRMS psPP ps % 30 45 55 85 55 10. Random jitter is additive jitter. 11. Deterministic jitter is measured with 2 -1 PRBS pattern. April 2010 6 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Functional Description CML Output Termination with VCCO 1.2V For VCCO of 1.2V, Figure 5a, terminate the output with 50 Ohms to 1.2V, not 100 ohms differentially across the outputs. If AC coupling is used, Figure 5d, terminate into 50 ohms to 1.2V before the coupling capacitor and then connect to a high value resistor to a reference voltage. Any unused output pair with VCCO at 1.2V needs to be terminated, do not leave floating. CML Output Termination with VCCO 1.8V, 2.5V For VCCO of 1.8V or 2.5V, Figure 5a/b, terminate with either 50 ohms to 1.8V or 100 ohms differentially across the outputs. AC-or DC-coupling is fine. For best signal integrity, terminate any unused output pairs. Timing Diagrams Figure 1a. IN-to-Q Timing Diagram Figure 1b. SEL-to-Q Timing Diagram (Qx state can be high or low depending on input data) April 2010 7 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Input and Output Stage Figure 2a. Simplified Differential Input Buffer Figure 2b. Simplified CML Output Buffer Single-Ended and Differential Swings Figure 3a. Single-Ended Swing Figure 3b. Differential Swing April 2010 8 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Input Interface Applications Figure 4a. CML Interface 100 Differential (DC-Coupled, 1.8V, 2.5V) Figure 4b. CML Interface 50 to Vcc (DC-Coupled, 1.2V,1.8V,2.5V) Figure 4c. CML Interface (AC-Coupled) *See note in Functional Description for 1.2V CML driver with AC-Coupling Figure 4d. LVPECL Interface (AC-Coupled) Figure 4e. LVPECL Interface (DC-Coupled 2.5V and 3.3V) Figure 4f. LVDS Interface April 2010 9 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR CML Output Termination Figure 5a. 1.2V, 1.8V, 2.5V CML DC-Coupled Termination Figure 5b. 1.8V, 2.5V CML DC-Coupled Termination Figure 5c. CML AC-Coupled Termination VCCO 1.8V, 2.5V only Figure 5d. CML AC-Coupled Termination VCCO 1.2V only April 2010 10 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY56028XR Package Information 32-Pin MLF(R) (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. (c) 2010 Micrel, Incorporated. April 2010 11 M9999-040810-A hbwhelp@micrel.com or (408) 955-1690 |
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