Micrel ULTRA-LOW JITTER DUAL 2 x 2 CROSSPOINT SWITCH w/ CML OUTPUTS AND INTERNAL I/O TERMINATION Precision EdgeTM SY58024U Precision EdgeTM SY58024U FEATURES Guaranteed AC performance over temperature and voltage: * >10.7Gbps data throughput * <60ps tr/tf times * <350ps tpd (IN-to-Q) * <20ps skew Low jitter: * <10pspp total jitter (clock) * <1psrms random jitter (data) * <10pspp deterministic jitter (data) Crosstalk induced jitter: <0.7psrms Unique, patent-pending input isolation minimizes adjacent channel crosstalk Accepts an input signal as low as 100mV Unique, patent-pending input termination and VT pin accepts DC-coupled and AC-coupled differential inputs: LVPECL, LVDS, and CML Fully differential inputs/outputs 50 source terminated CML outputs Power supply 2.5V 5% and 3.3V 10% Industrial -40C to +85C temperature range Available in 32-pin (5mm x 5mm) MLFTM package Precision EdgeTM DESCRIPTION The SY58024U is a 2.5V/3.3V precision, high-speed, fully differential dual CML crosspoint switch. The SY58024U is optimized to provide two identical output copies with less than 20ps of skew and ultra-low jitter. The SY58024U can process clock signals as fast as 6GHz or data patterns up to 10.7Gbps. The differential input includes Micrel's unique, 3-pin input termination architecture that allows the SY58024U to directly interface to LVPECL, LVDS, and CML differential signal (AC- or DC-coupled) without any level-shifting or termination resistor networks in the signal path. The CML outputs features a 400mV typical swing into 50 loads, and provides an extremely fast rise/fall time guaranteed to be less than 60ps. The SY58024U operates from a 2.5V 5% supply or 3.3V 10% supply and is guaranteed over the full industrial temperature range (-40C to +85C). For applications that require high-speed single channel CML switches, consider the SY58023U. The SY58024U is part of Micrel's highspeed, Precision EdgeTM product line. Data sheets and support documentation can be found on Micrel's website at www.micrel.com. APPLICATIONS Gigabit Ethernet data/clock routing SONET data/clocking routing Switch fabric clock routing Redundant switchover Backplane redundancy Precision Edge is a trademark of Micrel, Inc. MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc. M9999-091404 hbwhelp@micrel.com or (408) 955-1690 Rev.: B 1 Amendment: /0 Issue Date: September 2004 Precision EdgeTM SY58024U Micrel PACKAGE/ORDERING INFORMATION SELA0 /IN A1 VTA1 INA1 SELA1 /INA0 VTA0 INA0 Ordering Information(1) 1 2 3 4 5 6 7 8 32 3130 29 28 27 26 25 24 23 22 21 20 19 18 17 9 10 11 12 13 14 15 16 GND VCC QA0 /QA0 VCC QA1 /QA1 VCC Package Operating Type Range SY58024UMI MLF-32 Industrial Package Marking Lead Finish SY58024U Sn-Pb SY58024U Sn-Pb SY58024UMITR(2) MLF-32 Industrial SY58024UMY MLF-32 Industrial SY58024U Pb-Free with "Y" designator SY58024UMYTR(2) MLF-32 Industrial SY58024U Pb-Free with "Y" designator Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC electricals only. GND VCC /QB0 QB0 VCC QB1 /QB1 VCC INB1 VTB1 /INB1 SELB0 INB0 VTB0 /INB0 SELB1 Part Number 2. Tape and Reel. 32-Pin MLFTM (MLF-32) PIN DESCRIPTION Pin Number Pin Name Pin Function 25, 27 29, 31, 1, 3, 5, 7 INA0, /INA0, INA1, /INA1, INB1, /INB1 INB0, /INB0 Differential Signal: Each pin of this pair internally terminates with 50 to the VT pin. The input will default to an indeterminate state if left open. See "Input Interface Application" section. 26, 30 2, 6 VTA0, VTA1, VTB1, VTB0 Input Termination Center-Tap: Each input terminates to this pin. The VT pin provides a center-tap for each input (IN, /IN) to a termination network for maximum interface flexibility. See "Input Interface Application" section. 32, 28, 8, 4 SELA0, SELA1, SELB1, SELB0 9,24 GND, Exposed Pad Ground. Exposed pad must be connected to a ground plane that is the same potential as the device ground pins. 10,13,16, 17, 20, 23 VCC Positive Power Supply: Bypass with 0.1F0.01F low ESR capacitors as close to the VCC pins as possible. 11, 12, 14, 15 18, 19, 21, 22 /QB0, QB0, QB1, /QB1, /QA1, QA1, /QA0, QA0 CML Differential Output Pairs: Differential buffered output copy of the selected input signal. The CML single-ended output swing is typically 400mV into 50 or 100 across the pair. Unused output pairs may be left floating with no impact on jitter. See "CML Output Termination" section. Select Input: TTL/CMOS select input controls that selects inputs IN0, or IN1, for their respective banks A and B. Each input is internally connected to a 25k pull-up resistor and will default to a logic high state if left open. TRUTH TABLE SELA0 SELA1 QA0 QA1 SELB0 SELB1 QB0 QB1 0 0 INA0 INA0 0 0 INB0 INB0 0 1 INA0 INA1 0 1 INB1 INB1 1 0 INA1 INA0 1 0 INB1 INB0 1 1 INA1 INA1 1 1 INB1 INB1 M9999-091404 hbwhelp@micrel.com or (408) 955-1690 2 Precision EdgeTM SY58024U Micrel FUNCTIONAL BLOCK DIAGRAM SY58024U Dual 2 x 2 Crosspoint Switch Bank A SELA0 0 INA0 QA0 50 VTA0 50 1 /QA0 /INA0 SELA1 0 INA1 50 QA1 VTA1 50 1 /INA1 /QA1 Bank B SELB0 0 INB0 QB0 50 VTB0 50 1 /QB0 /INB0 SELB1 0 INB1 50 QB1 VTB1 50 1 /INB1 M9999-091404 hbwhelp@micrel.com or (408) 955-1690 3 /QB1 Precision EdgeTM SY58024U Micrel 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 Current (VT) Source or Sink Current on VT pin .................. 100mA Input Current (VT) Source or Sink Current on IN, /IN ..................... 50mA Lead Temperature (soldering, 20 sec.) ..................... 260C Storage Temperature (TS) ........................... -65C +150C Supply Voltage (VCC) ............................ +2.375V to +3.60V Ambient Temperature (TA) ......................... -40C to +85C Package Thermal Resistance(3) MLFTM (JA) Still-Air ............................................................. 35C/W 500lfpm ............................................................ 28C/W MLFTM (JB) Junction-to-board resistance ........................... 20C/W DC ELECTRICAL CHARACTERISTICS(4) TA = -40C to +85C. Symbol Parameter Condition Min Typ Max Units VCC Power Supply Voltage 2.5V nominal 3.3V nominal 2.375 3.0 2.5 3.3 2.625 3.60 V V ICC Power Supply Current VCC = max., current through internal 50 source termination resistor included. 200 250 mA VIH Input HIGH Voltage IN, /IN; Note 5 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 Swing IN, /IN, see Figure 1b. 0.2 RIN IN-to-VT Resistance 40 V 50 IN to VT 60 1.28 V Max Units VCC V CML OUTPUT DC ELECTRICAL CHARACTERISTICS(4) VCC = +3.3V 10% or +2.5V 5%; RL = 100 across each pair; TA = -40C to +85C, unless otherwise stated. Symbol Parameter Condition Min Typ VOH Output HIGH Voltage Q0, /Q0; Q1, /Q1 VOUT Output Voltage Swing Q0, /Q0; Q1, /Q1; see Figure 1a. 325 400 500 mV VDIFF_OUT Differential Voltage Swing Q0, /Q0; Q1, /Q1; see Figure 1b. 650 800 1000 mV ROUT Output Source Impedance Q0, /Q0; Q1, /Q1 40 50 60 VCC-0.020 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 Ratlng" 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. Thermal performance assumes exposed pad is soldered (or equivalent) to the device's most negative potential (GND) on the PCB. JA and JB are characterized for 4-layer boards in still air, 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. VIH (min.) not lower than 1.2V. M9999-091404 hbwhelp@micrel.com or (408) 955-1690 4 Precision EdgeTM SY58024U Micrel AC ELECTRICAL CHARACTERISTICS(6) VCC = +2.5V 5% or +3.3V 10%; RL = 100 across each output pair; TA = -40C to +85C, unless otherwise stated. Symbol Parameter Condition Min fMAX Maximum Operating Frequency VIN 100mV; VOUT 200mV Clock NRZ Data tpd Propagation Delay tSKEW tJITTER Max Units 6 GHz 10.7 Gbps IN-to-Q 200 350 ps SEL-to-Q 100 400 ps Channel-to-Channel Skew (Within Bank) Note 7 20 ps Part-to-Part Skew Note 8 75 ps Clock Note 9 1 psrms Total Jitter Note 10 10 pspp Random Jitter Note 11 1 psrms Deterministic Jitter Note 12 10 pspp Crosstalk Induced Jitter Adjacent Channel Note 13 0.7 psrms 60 ps Cycle-to-Cycle Jitter Data tr, tf Typ Output Rise/Fall Time 20% to 80% at full swing. 25 Notes: 6. High frequency AC-parameters are guaranteed by design and characterization. 7. Skew is measured between outputs of the same bank under identical transitions. 8. 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. 9. 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. 10. 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. 11. 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. 13. 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 similar, differential clock frequencies that are asynchronous with respect to each other at inputs. SINGLE-ENDED AND DIFFERENTIAL SWINGS VIN, VOUT VDIFF_IN, VDIFF_OUT (Typ. 800mV) Typ. 400mV Figure 1b. Differential Voltage Swing Figure 1a. Single-Ended Voltage Swing M9999-091404 hbwhelp@micrel.com or (408) 955-1690 5 Precision EdgeTM SY58024U Micrel TIMING DIAGRAM /IN VOUT = 400mV (typ.) (50 load) IN /Q tpd tpd VOUT = 400mV (typ.) (50 load) Q Figure 2a. AC Timing Diagram IN-to-Q VCC/2 VCC/2 SEL /Q tpd tpd VOUT = 400mV (typ.) (50 load) Q IN0, /IN1 = LOW, /IN0, IN1 = HIGH Figure 2b. AC Timing Diagram SEL-to-Q M9999-091404 hbwhelp@micrel.com or (408) 955-1690 6 Precision EdgeTM SY58024U Micrel TYPICAL OPERATING CHARACTERISTICS VCC = 2.5V, VIN = 100mV, TA = 25C, unless otherwise noted. Propagation Delay vs. Temperature Frequency vs. Amplitude PROPAGATION DELAY (ps) AMPLITUDE (mV) 500 450 400 350 300 250 200 150 100 50 0 0 205 204 203 202 201 200 199 198 197 196 195 -60 -40 -20 0 2000 4000 6000 8000 10000 FREQUENCY (MHz) Propagation Delay vs. Input Voltage Swing 3.5 210 200 195 190 185 2.5 2 1.5 1 0.5 180 175 0 Within Device Skew vs. Temperature 3 205 DELTA SKEW (ps) PROPAGATION DELAY (ps) 215 20 40 60 80 100 TEMPERATURE (C) 0 -60 -40 -20 0 200 400 600 800 1000 1200 INPUT VOLTAGE SWING (mV) M9999-091404 hbwhelp@micrel.com or (408) 955-1690 20 40 60 80 100 TEMPERATURE (C) 7 Precision EdgeTM SY58024U Micrel FUNCTIONAL CHARACTERISTICS VCC = 2.5V, VIN = 100mV, TA = 25C, unless otherwise noted. 5Gbps Output 2.5GHz Output Amplitude (100mV/div.) Amplitude (100mV/div.) 223-1 PRBS TIME (50ps/div.) 1.25GHz Output 200MHz Output Amplitude (100mV/div.) Amplitude (100mV/div.) TIME (50ps/div.) TIME (600ps/div.) TIME (100ps/div.) M9999-091404 hbwhelp@micrel.com or (408) 955-1690 8 Precision EdgeTM SY58024U Micrel INPUT STAGE VCC IN 50 VT GND 50 /IN Figure 3. Simplified Differential Input Buffer INPUT INTERFACE APPLICATIONS VCC VCC VCC VCC IN IN LVPECL CML /IN /IN IN SY58024U CML SY58024U /IN SY58024U NC 0.01F R1 VT 0.01F VT Rpd R2 VT For 2.5V, R1 = 1k, R2 = 1.1k. For 3.3V, R1 = 649, R2 = 1k. Figure 4a. DC-Coupled CML Input Interface Figure 4b. AC-Coupled CML Input Interface Option: may connect VT to VCC VCC VCC IN VCC VCC LVPECL /IN Rpd Rpd IN SY58024U LVDS R1 /IN 0.01F VCC VCC VT SY58024U R2 NC VT For 2.5V, Rpd = 50, R1 = 1k, R2 = 1.1k. For 3.3V, Rpd = 100, R1 = 649, R2 = 1k. Figure 4d. AC-Coupled LVPECL Input Interface M9999-091404 hbwhelp@micrel.com or (408) 955-1690 Figure 4e. LVDS Input Interface 9 For 2.5V, Rpd = 19. For 3.3V, Rpd = 50. Figure 4c. DC-Coupled LVPECL Input Interface Precision EdgeTM SY58024U Micrel CML OUTPUT TERMINATION Figures 5 and Figure 6 illustrates how to terminate a CML output using both the AC-coupled and DC-coupled configuration. All outputs of the SY58024U are 50 with a 16mA current source. VCC VCC 50 50 50 50 DC-bias per application Q Q 50 100 50 /Q /Q 16mA 16mA GND GND Figure 5. CML DC-Coupled Termination Figure 6. CML AC-Coupled Termination RELATED PRODUCT AND SUPPORT DOCUMENTATION Part Number Function Data Sheet Link SY58023U Ultra-low Jitter 2x2 Crosspoint Switch w/CML Outputs and Internal I/O Termination http://www.micrel.com/product-info/products/SY58023U.shtml SY58024U Ultra-low Jitter Dual 2x2 Crosspoint Switch w/CML Outputs and Internal I/O Termination http://www.micrel.com/product-info/products/sy58024u.shtml 32-MLF Manufactering Guidelines Exposed Pad Application Note www.amkor.com/products/notes_papers/MLF_AppNote.pdf HBW Solutions http://www.micrel.com/product-info/as/solutions.shtml M9999-091404 hbwhelp@micrel.com or (408) 955-1690 10 Precision EdgeTM SY58024U Micrel 32 LEAD MicroLeadFrameTM (MLF-32) Package Rev. 01 EP- Exposed Pad Die CompSide Island Heat Dissipation Heat Dissipation VEE Heavy Copper Plane VEE Heavy Copper Plane PCB Thermal Consideration for 32-Pin MLFTM Package (Always solder, or equivalent, the exposed pad to the PCB) Package Notes: 1. Package meets Level 2 qualification. 2. All parts are dry-packaged before shipment. 3. Exposed pads must be soldered to a ground for proper thermal management. MICREL, INC. 1849 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. (c) 2004 Micrel, Incorporated. M9999-091404 hbwhelp@micrel.com or (408) 955-1690 11