SY89540UMY-TR

SY89540U Precision Low Jitter 4x4 LVDS Crosspoint Switch with Internal Termination General Description The SY89540U is a low-jitter, low skew, high-speed 4x4 crosspoint switch optimized for precision telecom and enterprise server/storage distribution applications. The SY89540U guarantees data-rates up to 3.2Gbps over temperature and voltage. The SY89540U differential input includes Micrel’s unique, 3-pin input termination architecture that directly interfaces to any differential signal (AC or DCcoupled) as small as 100mV (200mVpp) without any level shifting or termination resistor networks in the signal path. The LVDS compatible outputs maintain extremely fast rise/fall times guaranteed to be less than 120ps. The SY89540U features a patent-pending isolation design that significantly improves on channel-tochannel crosstalk performance. The SY89540U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range (–40°C to +85°C). The SY89540U 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. Typical Performance Precision Edge ® Features • Provides crosspoint switching between any input pairs to any output pair • Patent pending, channel-to-channel isolation design provides superior crosstalk performance • Guaranteed AC performance over temperature and voltage: • DC-to-3.2Gbps throughput – Q1, and IN3 -> Q0: Input SIN1 SIN0 SOUT1 SOUT0 Load IN0 0 0 1 1 0 IN1 IN2 IN3 0 1 1 1 0 1 1 0 0 1 0 0 Config. Output 0 Q3 0 Q2 0 Q1 0 Q0 0 0 0 Table 1. 4:4 Buffer Truth Table Oct., 1, 2013 5 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U 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+5.0V (3) Termination Current Source or sink current on VT .................. ±100mA Input Current Source or sink current on IN, /IN .............. ±50mA VREF-AC Current Source or sink current on VREF-AC ............... ±2mA Lead Temperature (soldering, 20sec.) ............. 260°C Storage Temperature (Ts) ............... –65°C to +150°C Supply Voltage (VCC) .................. +2.375V to +2.625V Ambient Temperature (TA) ................ –40°C to +85°C (4) Package Thermal Resistance QFN (JA) Still-air ............................................................ 23°C/W QFN (JB) Junction-to-board ........................................... 12°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 2.375 2.5 2.625 V ICC Power Supply Current No load, max. VCC. 200 280 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) 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 |IN, /IN| See Figure 1b. 0.2 IN-to-VT Maximum Input Voltage |IN-to-VT| VREF-AC Reference Voltage VCC–1.3 V VCC–1.2 1.28 V VCC–1.1 V Notes: 1. Permanent device damage may occur if ratings in the “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 limited drive capability use for input of the same package only. 4. Assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the PCB.  JB uses a 4-layer JA 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. Oct., 1, 2013 6 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U LVDS Outputs DC Electrical Characteristics VCC = 2.5V ±5%, TA = –40°C to +85°C, RL = 100Ω across Q and /Q, unless otherwise noted. Symbol Parameter VOH Output HIGH Voltage (Q, /Q) VOL Output LOW Voltage (Q, /Q) VOUT Output Voltage Swing (Q, /Q) See Figure 1a. 250 350 mV VDIFF_OU Differential Output Voltage Swing |Q – /Q| See Figure 1b. 500 700 mV VOCM Output Common Mode Voltage (Q, /Q) See Figure 4b. 1.125 1.275 V VOCM Change in Common Mode Voltage (Q, /Q) See Figure 4b. –50 +50 mV Max Units VCC V 0.8 V 30 µA T Condition Min Typ Max Units 1.475 V 0.925 V LVTTL/CMOS DC Electrical Characteristics VCC = 2.5V ±5%, TA = –40°C to +85°C, unless otherwise noted. Symbol Parameter VIH Input HIGH Voltage VIL Input LOW Voltage IIH Input HIGH Current IIL Input LOW Current Oct., 1, 2013 Condition Min 2.0 –125 –300 VIL = 0V 7 Typ µA M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U AC Electrical Characteristics(7) VCC = 2.5V ±5%, TA = –40°C to +85°C, RL = 100Ω across each output pair, unless otherwise noted. Symbol Parameter Condition Min Typ fMAX Maximum Operating Frequency NRZ Data 3.2 4 Gbps tPD Propagation Delay Clock, VOUT ≥200mV 4 GHz IN-to-Q 280 CONFIG-to-Q 350 tPD Tempco tS 380 Max 480 Ω 800 160 Set-up Time SIN-to-LOAD SOUT-to-LOAD LOAD-to-CONFIG CONFIG-to-LOAD Units fs/°C 800 800 800 950 ps th Hold Time LOAD-to-SIN, LOAD-to-SOUT 800 ps tPW Minimum LOAD and CONFIG Pulse Width 800 ps tSKEW Output-to-Output Skew Part-to-Part Skew Note 8 Note 9 tJITTER RMS Phase Jitter Output = 622MHz 30 150 95 ps ps fs Integration Range 12kHz – 20MHz tr , t r Crosstalk-Induced Jitter Note 10 Rise/Fall Times At full output swing (20% to 80%) 40 80 0.7 psRMS 120 ps Notes: 7. High frequency AC-parameters are guaranteed by design and characterization. 8. Output to output skew is measured between two different outputs under identical transitions. Input voltage swing is 100mV. 9. Part-to-part skew is defined for two parts with identical power supply voltages at the same temperature and with no skew of the edges at the respective inputs. 10. Crosstalk induced jitter is defined as the added jitter that results from signals applied to two adjacent channels. It is measured at the output while applying two similar, differential clock frequencies that are asynchronous with respect to each other at the inputs. Oct., 1, 2013 8 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U Single-Ended and Differential Swing Figure 1b. Differential Voltage Swing Figure 1a. Single-Ended Voltage Swing Timing Diagram Figure 2. Timing Diagram Truth Tables Input Select Address Table Output Select Address Table SIN1 SIN0 Input SOUT1 SOUT0 Output 0 0 IN0 0 0 Q0 0 1 IN1 0 1 Q1 1 0 IN2 1 0 Q2 1 1 IN3 1 1 Q3 Oct., 1, 2013 9 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U Typical Operating Characteristics VCC = 2.5, VIN = 100mV, at 25°C. Oct., 1, 2013 10 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U Functional Characteristics VCC = 2.5, VIN = 100mV, at 25°C. Clock Pattern Data Pattern Oct., 1, 2013 11 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U Input and Output Stage Internal Termination Output Stage Internal Termination On a nominal 1.25V common mode above ground, LVDS specifies a small swing of 350mV, typical. The common mode voltage has tight limits to permit large variations in ground between an LVDS driver and receiver. Also, change in common mode voltage, as a function of data input, is kept to a minimum to keep EMI low. Figure 3. Simplified Differential Input Stage Figure 4a. LVDS Differential Measurement Figure 4b. LVDS Common Mode Measurement Oct., 1, 2013 12 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U Input Interface Applications Figure 5a. LVPECL Interface (DC-Coupled) Figure 5b. LVPECL Interface (AC0Coupled) Figure 5d. CML Interface (AC-Coupled) Figure 5e. LVDS Interface Figure 5c. CML Interface (DC-Coupled) Related Product and Support Documentation Part Number Function Datasheet Link SY58540U Ultra Precision 4x4 CML Crosspoint Switch w/Internal I/O Termination http:///www.micrel.com/product-info/products/sy89540u.shtml HBW Solutions New Products and Applications www.micrel.com/product-info/products/solutions.shtml Oct., 1, 2013 13 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SY89540U Package Information 44-Pin QFN 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. © 2005 Micrel, Incorporated. Oct., 1, 2013 14 M9999-120607-C hbwhelp@micrel.com or (408) 955-1690