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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
s Guaranteed AC performance over temperature and voltage: * >10.7Gbps data throughput * <60ps tr/tf times * <350ps tpd (IN-to-Q) * <20ps skew s Low jitter: * <10pspp total jitter (clock) * <1psrms random jitter (data) * <10pspp deterministic jitter (data) s Crosstalk induced jitter: <0.7psrms s Unique, patent-pending input isolation minimizes adjacent channel crosstalk s Accepts an input signal as low as 100mV s Unique, patent-pending input termination and VT pin accepts DC-coupled and AC-coupled differential inputs: LVPECL, LVDS, and CML s Fully differential inputs/outputs s 50 source terminated CML outputs s Power supply 2.5V 5% and 3.3V 10% s Industrial -40C to +85C temperature range s 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
s s s s s 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 Amendment: /0
1
Issue Date: September 2004
Micrel
Precision EdgeTM SY58024U
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
SELA0 /IN A1 VTA1 INA1 SELA1 /INA0 VTA0 INA0
Part Number SY58024UMI
GND VCC QA0 /QA0 VCC QA1 /QA1 VCC
Package Operating Type Range MLF-32 MLF-32 MLF-32 Industrial Industrial Industrial Industrial
Package Marking SY58024U SY58024U
Lead Finish Sn-Pb Sn-Pb
INB1 VTB1 /INB1 SELB0 INB0 VTB0 /INB0 SELB1
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
SY58024UMITR(2) SY58024UMY
SY58024U Pb-Free with "Y" designator SY58024U Pb-Free with "Y" designator
SY58024UMYTR(2) MLF-32
Notes:
GND VCC /QB0 QB0 VCC QB1 /QB1 VCC
1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC electricals only. 2. Tape and Reel.
32-Pin MLFTM (MLF-32)
PIN DESCRIPTION
Pin Number 25, 27 29, 31, 1, 3, 5, 7 26, 30 2, 6 32, 28, 8, 4 9,24 10,13,16, 17, 20, 23 11, 12, 14, 15 18, 19, 21, 22 Pin Name INA0, /INA0, INA1, /INA1, INB1, /INB1 INB0, /INB0 VTA0, VTA1, VTB1, VTB0 SELA0, SELA1, SELB1, SELB0 GND, Exposed Pad VCC /QB0, QB0, QB1, /QB1, /QA1, QA1, /QA0, QA0 Pin Function 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. 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. 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. Ground. Exposed pad must be connected to a ground plane that is the same potential as the device ground pins. Positive Power Supply: Bypass with 0.1F0.01F low ESR capacitors as close to the VCC pins as possible. 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.
TRUTH TABLE
SELA0 0 0 1 1 SELA1 0 1 0 1 QA0 INA0 INA0 INA1 INA1 QA1 INA0 INA1 INA0 INA1 SELB0 0 0 1 1 SELB1 0 1 0 1 QB0 INB0 INB1 INB1 INB1 QB1 INB0 INB1 INB0 INB1
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Micrel
Precision EdgeTM SY58024U
FUNCTIONAL BLOCK DIAGRAM
SY58024U Dual 2 x 2 Crosspoint Switch Bank A
SELA0
INA0 50 VTA0 50 /INA0 SELA1
0
QA0
1
/QA0
INA1 50 VTA1 50 /INA1
0
QA1
1
/QA1
Bank B
SELB0
INB0 50 VTB0 50 /INB0 SELB1
0
QB0
1
/QB0
INB1 50 VTB1 50 /INB1
0
QB1
1
/QB1
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Precision EdgeTM SY58024U
Absolute Maximum Ratings(1)
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
Operating Ratings(2)
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 VCC ICC VIH VIL VIN VDIFF_IN RIN IN to VT Parameter Power Supply Voltage Power Supply Current Input HIGH Voltage Input LOW Voltage Input Voltage Swing Differential Input Swing IN-to-VT Resistance Condition 2.5V nominal 3.3V nominal VCC = max., current through internal 50 source termination resistor included. IN, /IN; Note 5 IN, /IN IN, /IN, see Figure 1a. IN, /IN, see Figure 1b. VCC -1.6 0 0.1 0.2 40 50 60 1.28 Min 2.375 3.0 Typ 2.5 3.3 200 Max 2.625 3.60 250 VCC VIH -0.1 1.7 Units V V mA V V V V 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 VOH VOUT VDIFF_OUT ROUT
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.
Parameter Output HIGH Voltage Output Voltage Swing Differential Voltage Swing Output Source Impedance
Condition Q0, /Q0; Q1, /Q1 Q0, /Q0; Q1, /Q1; see Figure 1a. Q0, /Q0; Q1, /Q1; see Figure 1b. Q0, /Q0; Q1, /Q1
Min VCC-0.020 325 650 40
Typ
Max VCC
Units V mV mV
400 800 50
500 1000 60
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Precision EdgeTM SY58024U
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 fMAX tpd tSKEW Parameter Maximum Operating Frequency Condition VIN 100mV; VOUT 200mV IN-to-Q SEL-to-Q Channel-to-Channel Skew (Within Bank) Part-to-Part Skew tJITTER Clock Data Cycle-to-Cycle Jitter Total Jitter Random Jitter Deterministic Jitter Crosstalk Induced Jitter Adjacent Channel tr, tf
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.
Min Clock NRZ Data 6 10.7 200 100
Typ
Max
Units GHz Gbps
Propagation Delay
350 400 20 75 1 10 1 10 0.7
ps ps ps ps psrms pspp psrms pspp psrms ps
Note 7 Note 8 Note 9 Note 10 Note 11 Note 12 Note 13 20% to 80% at full swing. 25
Output Rise/Fall Time
60
SINGLE-ENDED AND DIFFERENTIAL SWINGS
VIN, VOUT
Typ. 400mV
VDIFF_IN, VDIFF_OUT (Typ. 800mV)
Figure 1a. Single-Ended Voltage Swing
Figure 1b. Differential Voltage Swing
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Precision EdgeTM SY58024U
TIMING DIAGRAM
/IN IN /Q Q tpd tpd VOUT = 400mV (typ.) (50 load) VOUT = 400mV (typ.) (50 load)
Figure 2a. AC Timing Diagram IN-to-Q
VCC/2 SEL /Q Q IN0, /IN1 = LOW, /IN0, IN1 = HIGH tpd
VCC/2 tpd VOUT = 400mV (typ.) (50 load)
Figure 2b. AC Timing Diagram SEL-to-Q
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Precision EdgeTM SY58024U
TYPICAL OPERATING CHARACTERISTICS
VCC = 2.5V, VIN = 100mV, TA = 25C, unless otherwise noted.
Frequency vs. Amplitude
PROPAGATION DELAY (ps)
Propagation Delay vs. Temperature
205 204 203 202 201 200 199 198 197 196 195 -60 -40 -20 0 20 40 60 80 100
500 450 AMPLITUDE (mV) 400 350 300 250 200 150 100 50 0 0 2000 4000 6000 8000 10000 FREQUENCY (MHz)
TEMPERATURE (C)
215
Propagation Delay vs. Input Voltage Swing
3.5 3 DELTA SKEW (ps) 2.5 2 1.5 1 0.5
Within Device Skew vs. Temperature
PROPAGATION DELAY (ps)
210 205 200 195 190 185 180 175 0 200 400 600 800 1000 1200 INPUT VOLTAGE SWING (mV)
0 -60 -40 -20 0
20 40 60 80 100
TEMPERATURE (C)
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Precision EdgeTM SY58024U
FUNCTIONAL CHARACTERISTICS
VCC = 2.5V, VIN = 100mV, TA = 25C, unless otherwise noted.
5Gbps Output 223-1 PRBS
Amplitude (100mV/div.) Amplitude (100mV/div.)
2.5GHz Output
TIME (50ps/div.)
TIME (50ps/div.)
1.25GHz Output
200MHz Output
Amplitude (100mV/div.)
Amplitude (100mV/div.)
TIME (100ps/div.)
TIME (600ps/div.)
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Precision EdgeTM SY58024U
INPUT STAGE
VCC
IN 50 VT GND 50 /IN
Figure 3. Simplified Differential Input Buffer
INPUT INTERFACE APPLICATIONS
VCC VCC VCC CML IN CML /IN SY58024U NC VT R1 R2 0.01F VT /IN SY58024U VCC
VCC
VCC
IN
IN
LVPECL
/IN SY58024U 0.01F VT Rpd
For 2.5V, R1 = 1k, R2 = 1.1k. For 3.3V, R1 = 649, R2 = 1k.
For 2.5V, Rpd = 19. For 3.3V, Rpd = 50.
Figure 4a. DC-Coupled CML Input Interface
Option: may connect VT to VCC
VCC VCC
Figure 4b. AC-Coupled CML Input Interface
Figure 4c. DC-Coupled LVPECL Input Interface
IN
LVPECL
VCC
VCC
/IN Rpd R1 Rpd SY58024U
IN LVDS /IN
0.01F
VT
SY58024U
R2
NC
For 2.5V, Rpd = 50, R1 = 1k, R2 = 1.1k. For 3.3V, Rpd = 100, R1 = 649, R2 = 1k.
VT
Figure 4d. AC-Coupled LVPECL Input Interface
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Figure 4e. LVDS Input Interface
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Micrel
Precision EdgeTM SY58024U
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
50
VCC
50
Q 50
50
50
DC-bias per application
Q 100 /Q
/Q
50
16mA
16mA GND
GND
Figure 5. CML DC-Coupled Termination
Figure 6. CML AC-Coupled Termination
RELATED PRODUCT AND SUPPORT DOCUMENTATION
Part Number SY58023U SY58024U Function Ultra-low Jitter 2x2 Crosspoint Switch w/CML Outputs and Internal I/O Termination Ultra-low Jitter Dual 2x2 Crosspoint Switch w/CML Outputs and Internal I/O Termination 32-MLF Manufactering Guidelines Exposed Pad Application Note HBW Solutions Data Sheet Link http://www.micrel.com/product-info/products/SY58023U.shtml http://www.micrel.com/product-info/products/sy58024u.shtml www.amkor.com/products/notes_papers/MLF_AppNote.pdf http://www.micrel.com/product-info/as/solutions.shtml
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Precision EdgeTM SY58024U
32 LEAD MicroLeadFrameTM (MLF-32)
Package EP- Exposed Pad
Rev. 01
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
USA
+ 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 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
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