Micrel, Inc. ULTRA-LOW JITTER DUAL 2 × 2 CROSSPOINT SWITCH w/ CML OUTPUTS AND INTERNAL I/O TERMINATION Precision Edge® SY58024U ® Precision Edge 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 ■ 50Ω source terminated CML outputs ■ Power supply 2.5V ±5% and 3.3V ±10% ■ Industrial –40°C to +85°C temperature range ■ Available in 32-pin (5mm × 5mm) MLF® package Precision Edge® 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 50Ω 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 (–40°C to +85°C). For applications that require high-speed single channel CML switches, consider the SY58023U. The SY58024U is part of Micrel’s highspeed, Precision Edge® product line. Datasheets 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 registered trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology. M9999-020207 [email protected] or (408) 955-1690 Rev.: G 1 Amendment: /0 Issue Date: February 2007 Precision Edge® SY58024U Micrel, Inc. PACKAGE/ORDERING INFORMATION SELA0 /INA1 VTA1 INA1 SELA1 /INA0 VTA0 INA0 Ordering Information(1) 32 31 30 29 28 27 26 25 INB1 VTB1 /INB1 SELB0 INB0 VTB0 /INB0 SELB1 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 GND VCC QA0 /QA0 VCC QA1 /QA1 VCC Part Number Package Type Operating Range Package Marking Lead Finish SY58024UMI MLF-32 Industrial SY58024U Sn-Pb SY58024UMITR(2) MLF-32 Industrial SY58024U Sn-Pb SY58024UMG(3) MLF-32 Industrial SY58024U with Pb-Free bar-line indicator Pb-Free NiPdAu SY58024UMGTR(2, 3) MLF-32 Industrial SY58024U with Pb-Free bar-line indicator Pb-Free NiPdAu GND VCC /QB0 QB0 VCC /QB1 QB1 VCC 9 10 11 12 13 14 15 16 Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only. 2. Tape and Reel. 3. Pb-Free package recommended for new designs. 32-Pin MLF® (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 50Ω 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 0.1µF0.01µF 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 50Ω or 100Ω 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 25kΩ 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 M9999-020207 [email protected] or (408) 955-1690 2 Precision Edge® SY58024U Micrel, Inc. FUNCTIONAL BLOCK DIAGRAM SY58024U Dual 2 × 2 Crosspoint Switch Bank A SELA0 0 INA0 QA0 50Ω VTA0 50Ω 1 /QA0 /INA0 SELA1 0 INA1 50Ω QA1 VTA1 50Ω 1 /INA1 /QA1 Bank B SELB0 0 INB0 QB0 50Ω VTB0 50Ω 1 /QB0 /INB0 SELB1 0 INB1 50Ω QB1 VTB1 50Ω 1 /INB1 M9999-020207 [email protected] or (408) 955-1690 3 /QB1 Precision Edge® SY58024U Micrel, Inc. 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.) ..................... 260°C Storage Temperature (TS) ........................... –65°C +150°C Supply Voltage (VCC) ............................ +2.375V to +3.60V Ambient Temperature (TA) ......................... –40°C to +85°C Package Thermal Resistance(3) MLF® (θJA) Still-Air ............................................................. 35°C/W 500lfpm ............................................................ 28°C/W MLF® (ψJB) Junction-to-board resistance ........................... 20°C/W DC ELECTRICAL CHARACTERISTICS(4) TA = –40°C to +85°C. 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 50Ω source termination resistor included. 200 250 mA VIH Input HIGH Voltage IN, /IN VCC –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 Swing IN, /IN, see Figure 1b. 0.2 RIN IN-to-VT Resistance 40 V 50 IN to VT 60 Ω 1.28 V LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS(4) VCC = 2.5V ±5% or 3.3V ±10%; TA= -40°C to 85°C Symbol Parameter Condition Min Typ Max VIH Input HIGH Voltage VIL Input LOW Voltage 0.8 V IIH Input HIGH Current 40 µA IIL Input LOW Current 2.0 –300 Units V µA 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. Thermal performance assumes exposed pad is soldered (or equivalent) to the device's most negative potential (GND) on the PCB. θJA uses 4-layer 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. M9999-020207 [email protected] or (408) 955-1690 4 Precision Edge® SY58024U Micrel, Inc. CML OUTPUT DC ELECTRICAL CHARACTERISTICS(6) VCC = +3.3V ±10% or +2.5V ±5%; RL = 100Ω across each pair; TA = –40°C to +85°C, unless otherwise stated. Symbol Parameter Condition Min VOH Output HIGH Voltage Q0, /Q0; Q1, /Q1 VOUT Output Voltage Swing Q0, /Q0; Q1, /Q1; see Figure 1a. 325 VDIFF_OUT Differential Voltage Swing Q0, /Q0; Q1, /Q1; see Figure 1b. ROUT Output Source Impedance Q0, /Q0; Q1, /Q1 Typ Max Units VCC V 400 500 mV 650 800 1000 mV 40 50 60 Ω Max Units VCC–0.020 Notes: 6. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established. AC ELECTRICAL CHARACTERISTICS(7) VCC = +2.5V ±5% or +3.3V ±10%; RL = 100Ω across each output pair; TA = –40°C to +85°C, unless otherwise stated. Symbol Parameter Condition Min fMAX Maximum Operating Frequency VIN ≥ 100mV; VOUT ≥ 200mV Clock NRZ Data tpd Propagation Delay tSKEW tJITTER 6 GHz 10.7 Gbps IN-to-Q 200 350 ps SEL-to-Q 100 400 ps Channel-to-Channel Skew (Within Bank) Note 8 20 ps Part-to-Part Skew Note 9 75 ps Clock Cycle-to-Cycle Jitter Note 10 1 psRMS Total Jitter Note 11 10 psPP Data tr, tf Typ Random Jitter Note 12 1 psRMS Deterministic Jitter Note 13 10 psPP Crosstalk Induced Jitter Adjacent Channel Note 14 0.7 psRMS 60 ps Output Rise/Fall Time 20% to 80% at full swing. 25 Notes: 7. High frequency AC-parameters are guaranteed by design and characterization. 8. Skew is measured between outputs of the same bank under identical transitions. 9. 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. 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. 11. 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. 12. Random jitter is measured with a K28.7 comma detect character pattern, measured at 2.5Gbps–3.2Gbps. 13. Deterministic jitter is measured at 2.5Gbps–3.2Gbps with both K28.5 and 223–1 PRBS pattern. 14. 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. M9999-020207 [email protected] or (408) 955-1690 5 Precision Edge® SY58024U Micrel, Inc. 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 TIMING DIAGRAM /IN VOUT = 400mV (typ.) (50Ω load) IN /Q tpd tpd VOUT = 400mV (typ.) (50Ω load) Q Figure 2a. AC Timing Diagram IN-to-Q VCC/2 VCC/2 SEL /Q tpd tpd VOUT = 400mV (typ.) (50Ω load) Q IN0, /IN1 = LOW, /IN0, IN1 = HIGH Figure 2b. AC Timing Diagram SEL-to-Q M9999-020207 [email protected] or (408) 955-1690 6 Precision Edge® SY58024U Micrel, Inc. TYPICAL OPERATING CHARACTERISTICS VCC = 2.5V, VIN = 100mV, TA = 25°C, 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) M9999-020207 [email protected] or (408) 955-1690 20 40 60 80 100 TEMPERATURE (¡C) 7 Precision Edge® SY58024U Micrel, Inc. FUNCTIONAL CHARACTERISTICS VCC = 2.5V, VIN = 100mV, TA = 25°C, 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.) M9999-020207 [email protected] or (408) 955-1690 8 Precision Edge® SY58024U Micrel, Inc. INPUT STAGE VCC IN 50Ω VT GND 50Ω /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 0.01µF R1 VT 0.01µF VT Rpd R2 VT For 2.5V, R1 = 1kΩ, R2 = 1.1kΩ. For 3.3V, R1 = 649Ω, R2 = 1kΩ. 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 0.01µF VCC VCC VT SY58024U R2 NC VT For 2.5V, Rpd = 50Ω, R1 = 1kΩ, R2 = 1.1kΩ. For 3.3V, Rpd = 100Ω, R1 = 649Ω, R2 = 1kΩ. Figure 4d. AC-Coupled LVPECL Input Interface M9999-020207 [email protected] or (408) 955-1690 Figure 4e. LVDS Input Interface 9 For 2.5V, Rpd = 19Ω. For 3.3V, Rpd = 50Ω. Figure 4c. DC-Coupled LVPECL Input Interface Precision Edge® SY58024U Micrel, Inc. 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 50Ω with a 16mA current source. VCC VCC 50Ω 50Ω 50Ω 50Ω DC-bias per application Q Q 50Ω 100Ω 50Ω /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 M9999-020207 [email protected] or (408) 955-1690 10 Precision Edge® SY58024U Micrel, Inc. 32-PIN MicroLeadFrame® (MLF-32) Package EP- Exposed Pad Die CompSide Island Heat Dissipation Heat Dissipation VEE Heavy Copper Plane VEE Heavy Copper Plane PCB Thermal Consideration for 32-Pin MLF® 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. 2180 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. © 2005 Micrel, Incorporated. M9999-020207 [email protected] or (408) 955-1690 11