SY8983 32U 2 .5V Ultra-P Precision 1 1:4 LVDS F Fanout Bufffer/Transla ator with In nternal Terrmination P Precision E Edge(R) Gen neral Desc cription Featu ures The SY89832U is s a 2.5V, hig gh-speed, 2G GHz differential, g (LVDS) 1:4 4 fanout bufffer low voltage differential swing mized for ultrra-low skew applications. Within device optim skew w is guarante eed to be le ess than 20p ps over supp ply voltage and tempe erature. The differential input buffer has a unique u intern nal termiination design that allows s access to the termination netw work through a VT pin. This s feature allow ws the device to o different log gic standards s. A VREF-A AC easilyy interface to refere ence output is s included forr AC-coupled applications. The SY89832U is a part off Micrel's hig gh-speed clo ock plications, see synchronization family. For 3.3V app 9833L or SY8 89833AL. For applications s that require e a SY89 differrent I/O com mbination, co onsult Micre el's website at www w.micrel.com and choose e from a comprehensive produ uct line of high-speed, low-skew fanout f buffers, transslators and clo ock generatorrs. Datasheets and support s docu umentation arre available on el's web site at: a www.micre el.com. Micre Fun nctional Block Diag gram Gu uaranteed AC C performance over tem mperature and d vo oltage: put DC-to >2.0GHz throughp opagation dela ay (IN-to-Q) <570ps pro <20ps withiin-device ske ew <200ps rise e/fall time design: Ulttra-low jitter d 81fsRMS pha ase jitter nique, patente ed input termination and V VT pin accepts s Un DC C- and AC-co oupled inputs Hig gh-speed LVD DS outputs 2.5 5V voltage su upply operatio on Ind dustrial tempe erature range e: -40C to +8 85C Avvailable in a 16-pin (3mm x 3mm) QFN package Appllications Prrocessor clockk distribution ONET clock d distribution SO Fib bre Channel cclock distributtion Gi gabit Etherne et clock distrib bution Typic cal Perform mance Preccision Edge is a registered r tradem mark of Micrel, Inc. Micrel Inc. * 2180 Fortune Driv ve * San Jose, CA C 95131 * USA * tel +1 (408) 94 44-0800 * fax + 1 (408) 474-1000 0 * http://www.m micrel.com Septe ember 10, 20 014 Revision 3.0 tcghelp@micrrel.com or (40 08) 955-1690 Micrel, Inc. SY89832U Ordering Information(1) Part Number Package Type Operating Range Package Marking Lead Finish SY89832UMG QFN-16 Industrial 832U with Pb-Free bar line indicator NiPdAu Pb-Free QFN-16 Industrial 832U with Pb-Free bar line indicator NiPdAu Pb-Free (2) SY89832UMG TR Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals only. 2. Tape and Reel. Truth Table IN /IN EN Q /Q 0 1 1 0 1 1 0 1 1 0 0 (3) X X 0 1 (3) Note: 3. On next negative transition of the input signal (IN). Pin Configuration 16-Pin QFN September 10, 2014 2 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Pin Description Pin Number Pin Name 15, 16 1, 2 3, 4 5, 6 Q0, /Q0 Q1, /Q1 Q2, /Q2 Q3, /Q3 Pin Function LVDS Differential (Outputs): Normally terminated with 100 across the pair (Q, /Q). See LVDS Outputs section for more details.Unused outputs should be terminated with a 100 resistor across each pair. 8 EN The single-ended, TTL/CMOS-compatible input functions as a synchronous output enable. The synchronous enable ensures that enable/disable will only occur when the outputs are in a logic LOW state. Note that this input is internally connected to a 25k pull-up resistor and will default to logic HIGH state (enabled) if left open. 9, 12 /IN, IN Differential Inputs: These input pairs are the differential signal inputs to the device. Inputs accept ACor DC-Coupled differential signs as small as 100mV. Each pin of a pair internally terminates to a VT pin through 50. Note that these inputs will default to an intermediate state if left open. See Input Interface Applications section for more details. 10 VREF-AC 11 VT 13 GND 7, 14 VCC September 10, 2014 Reference Voltage: These outputs bias to VCC-1.4V. They are used when AC coupling the inputs (IN, /IN). For AC-Coupled applications, connect VREF-AC to VT pin and bypass with 0.01F low ESR capacitor to VCC. See Input Interface Applications section for more details. Maximum sink/source current is 1.5mA. Due to the limited drive capability, each VREF-AC pin is only intended to drive its respective VT pin. Input Termination Center-Tap: Each side of the differential input pair terminates to a VT pin. The VT pins provide a center-tap to a termination network for maximum interface flexibility. See Input Interface Applications section for more details. Ground. GND pins and exposed pad must be connected to the most negative potential of the device ground. Positive Power Supply: Bypass with 0.1F//0.01F low ESR capacitors and place as close to each VCC pin as possible. 3 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Absolute Maximum Ratings(4) Operating Ratings(5) Supply Voltage (VCC) .................................... -0.5V to +4.0V Input Voltage (VIN). ................................. -0.5V to VCC +0.3V LVDS Output Current (IOUT) ....................................... 10mA Input Current Source or Sink Current on (IN, /IN) .................... 50mA VREF-AC Current Source or Sink Current on (IVT) ............................. 2mA Lead Temperature (soldering, 20s) ............................ 260C Storage Temperature (TS) ......................... -65C to +150C Supply Voltage Range (VIN) ................. +2.375V to +2.675V Ambient Temperature (TA) .......................... -40C to +85C (6) Package Thermal Resistance QFN (JA) Still-Air ....................................................... 60C/W (JB) ................................................................... 32C/W DC Electrical Characteristics(7) TA = -40C to +85C, unless otherwise noted. Symbol Parameter VCC Power Supply ICC Power Supply Current RIN Input Resistance (IN-to-VT) RDIFF_IN Condition Min. Typ. Max. Units 2.375 2.5 2.625 V 75 100 mA 45 50 55 Differential Input Resistance (IN-to-/IN) 90 100 110 VIH Input HIGH Voltage (IN, /IN) 0.1 VCC+0.3 V VIL Input LOW Voltage (IN, /IN) -0.3 VIH-0.1 V VIN Input Voltage Swing (IN, /IN) See Figure 4. 0.1 VCC V VDIFF_IN Differential Input Voltage Swing |IN - /IN| See Figure 5. 0.2 |IIN| Input Current (IN, /IN) Note 8 VREF-AC Output Reference Voltage No load, maximum VCC. VCC - 1.525 V VCC - 1.425 45 mA VCC - 1.325 V Notes: 4. 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 rating conditions for extended periods may affect device reliability. 5. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings. 6. 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 4-layer board in still-air number, unless otherwise stated. 7. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. 8. Due to the internal termination the input current depends on the applied voltages at IN, /IN and VT inputs. Do not apply a combination of voltages that causes the input current to exceed the maximum limit! September 10, 2014 4 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U LVDS Outputs DC Electrical Characteristics(7) VCC = 2.5V 5%, RL = 100 across the outputs; TA = -40C to +85C. Symbol Parameter Condition Min. Typ. Max. Units VOUT Output Voltage Swing See Figure 4. 250 325 mV VDIFF_OUT Differential Output Voltage Swing See Figure 5. 500 650 mV VOCM Output Common Mode Voltage VOCM Change in Common Mode Voltage 1.125 1.275 V -50 50 mV Max. Units LVTTL/CMOS DC Electrical Characteristics(7) VCC = 2.5V 5%, TA = -40C to +85C. Symbol Parameter Condition Min. Typ. VIH Input HIGH Voltage 2.0 VCC V VIL Input LOW Voltage 0 0.8 V IIH Input HIGH Current -125 30 A IIL Input LOW Current -300 A AC Electrical Characteristics(9) VCC = 2.5V 5% or 3.3V 10%, RL = 100 across the outputs; TA = -40C to +85C unless otherwise stated. Symbol Parameter Condition fMAX Maximum Frequency Propagation Delay tpd tSKEW IN-to-Q Min. Typ. VOUT 200mV 2.0 2.5 VIN < 400mV 370 470 570 ps VIN 400mV 300 410 500 ps 5 20 ps 200 ps Within-Device Skew Note 10 Part-to-Part Skew Note 11 Max. Units GHz tS Set-Up Time EN to IN, /IN Note 12 300 ps tH Hold Time EN to IN, /IN Note 12 500 ps tJITTER Additive Phase Jitter Output Rise/Fall Times (20% to 80%) tr, tf Carrier = 622MHz Integration Range: 12kHz - 20MHz 81 fs Carrier = 250MHz Integration Range: 12kHz - 20MHz 195 fs At full output swing. 70 150 200 ps Notes: 9. High-frequency AC parameters are guaranteed by design and characterization. 10. Within device skew is measured between two different outputs under identical input transitions. 11. 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. 12. Set-up and hold times apply to synchronous applications that intend to enable/disable before the next clock cycle. For asynchronous applications, set-up and hold times do not apply. September 10, 2014 5 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Timing Diagram September 10, 2014 6 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Typical Operating Characteristics VCC = 2.5V, GND = 0V, VIN = 400mV, RL = 100 across the outputs; TA = 25C, unless otherwise stated. September 10, 2014 7 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Functional Characteristics VCC = 2.5V, GND = 0V, VIN = 400mV, RL = 100 across the outputs; TA = 25C, unless otherwise stated. September 10, 2014 8 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Additive Phase Noise Plots VCC = +3.3V, GND = 0, TA = 25C September 10, 2014 9 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Input Stage Figure 1. Simplified Differential Input Buffer LVDS Outputs LVDS specifies a small swing of 325mV typical, on a nominal 1.2V common-mode above ground. The common-mode voltage has tight limits to permit large variations in ground noise between an LVDS driver and receiver. Figure 2. LVDS Differential Measurement Figure 3. LVDS Common Mode Measurement Single-Ended and Differential Swings Figure 4. Single-Ended Swing September 10, 2014 Figure 5. Differential Swing 10 Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89832U Input Interface Applications Figure 6. DC-Coupled CML Input Interface Figure 9. AC-Coupled LVPECL Input Interface September 10, 2014 Figure 7. AC-Coupled CML Input Interface Figure 8. DC-Coupled LVPECL Input Interface (*Bypass with 0.01F to GND) Figure 10. LVDS Input Interface 11 Figure 11. AC-Coupled LVDS Input Interface Revision 3.0 tcghelp@micrel.com or (408) 955-1690 Micre el, Inc. SY89832U U Pac ckage Info ormation and a Recom mmended d Land Patttern(13) 16-Pin 3mm m x 3mm QFN N (MM) Note: 13. P Package informattion is correct as s of the publicatio on date. For upda ates and most cu urrent information n, go to www.miccrel.com. Septe ember 10, 20 014 12 Revision 3.0 0 tcghelp@miccrel.com or (4 408) 955-1690 0 Micrel, Inc. SY89832U 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 Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high-performance linear and power, LAN, and timing & communications markets. The Company's products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network of distributors and reps worldwide. Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this datasheet. This information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Micrel's terms and conditions of sale for such products, Micrel assumes no liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. 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) 2005 Micrel, Incorporated. September 10, 2014 13 Revision 3.0 tcghelp@micrel.com or (408) 955-1690