1
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
DESCRIPTION
■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
FEATURES
Rev.: I Amendment: /0
Issue Date: August 2007
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 high-
speed, Precision Edge® product line.
Datasheets and support documentation can be found on
Micrel’s website at: www.micrel.com.
Precision Edge is a registered trademark of Micrel, Inc.
MLF and
Micro
LeadFrame are registered trademarks of Amkor Technology.
Precision Edge®
APPLICATIONS
■Gigabit Ethernet data/clock routing
■SONET data/clocking routing
■Switch fabric clock routing
■Redundant switchover
■Backplane redundancy
Precision Edge®
SY58024U
ULTRA-LOW JITTER DUAL 2 ××
××
×2
CROSSPOINT SWITCH w/ CML OUTPUTS
AND INTERNAL I/O TERMINATION
2
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
PACKAGE/ORDERING INFORMATION
Pin Number Pin Name Pin Function
25, 27 INA0, /INA0, Differential Signal: Each pin of this pair internally terminates with 50Ω to the VT pin. The
29, 31, INA1, /INA1, input will default to an indeterminate state if left open. See “Input Interface Application”
1, 3, INB1, /INB1 section.
5, 7 INB0, /INB0
26, 30 VTA0, VTA1, Input Termination Center-Tap: Each input terminates to this pin. The VT pin provides a
2, 6 VTB1, VTB0 center-tap for each input (IN, /IN) to a termination network for maximum interface flexibility.
See “Input Interface Application” section.
32, 28, SELA0, SELA1, Select Input: TTL/CMOS select input controls that selects inputs IN0, or IN1, for their
8, 4 SELB1, SELB0 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.
9,24 GND, Ground. Exposed pad must be connected to a ground plane that is the same potential as the
Exposed Pad device ground pins.
10,13,16, VCC Positive Power Supply: Bypass with 0.1µF0.01µF low ESR capacitors as close to the VCC
17, 20, 23 pins as possible.
11, 12, /QB0, QB0, CML Differential Output Pairs: Differential buffered output copy of the selected input signal.
15, 14 /QB1, QB1, The CML single-ended output swing is typically 400mV into 50Ω or 100Ω across the pair.
18, 19, /QA1, QA1, Unused output pairs may be left floating with no impact on jitter. See “CML Output
21, 22 /QA0, QA0 Termination” section.
PIN DESCRIPTION
24
23
22
21
20
19
18
17
GND
VCC
QA0
/QA0
VCC
QA1
/QA1
VCC
INB1
VTB1
/INB1
SELB0
INB0
VTB0
/INB0
SELB1
1
2
3
4
5
6
7
8
910111213141516
32 31 30 29 28 27 26 25
SELA1
INA1
VTA1
/INA1
SELA0
/INA0
VTA0
INA0
VCC
QB0
/
QB0
VCC
GND
QB1
/
QB1
VCC
32-Pin MLF® (MLF-32)
SELA0 SELA1 QA0 QA1 SELB0 SELB1 QB0 QB1
00INA0 INA0 0 0 INB0 INB0
01INA0 INA1 0 1 INB1 INB1
10INA1 INA0 1 0 INB1 INB0
11INA1 INA1 1 1 INB1 INB1
TRUTH TABLE
Ordering Information(1)
Package Operating Package Lead
Part Number Type Range Marking 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
Pb-Free bar-line indicator NiPdAu
SY58024UMGTR(2, 3) MLF-32 Industrial SY58024U with Pb-Free
Pb-Free bar-line indicator NiPdAu
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.
3
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
FUNCTIONAL BLOCK DIAGRAM
INA0
/INA0
QA1
/QA1
QA0
/QA0
V
TA0
50Ω
50Ω
INA1
/INA1
V
TA1
50Ω
50Ω
SELA0
SELA1
0
1
0
1
INB0
/INB0
QB1
/QB1
QB0
/QB0
V
TB0
50Ω
50Ω
INB1
/INB1
V
TB1
50Ω
50Ω
SELB0
SELB1
0
1
0
1
Bank A
Bank B
SY58024U Dual 2 × 2 Crosspoint Switch
4
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
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.) ..................... 260°C
Storage Temperature (TS) ...........................–65°C +150°C
Operating Ratings(2)
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
TA = –40°C to +85°C.
Symbol Parameter Condition Min Typ Max Units
VCC Power Supply Voltage 2.5V nominal 2.375 2.5 2.625 V
3.3V nominal 3.0 3.3 3.60 V
ICC Power Supply Current VCC = max., current through internal 200 250 mA
50Ω source termination resistor included.
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 V
RIN IN-to-VT Resistance 40 50 60 Ω
IN to VT1.28 V
DC ELECTRICAL CHARACTERISTICS(4)
VCC = 2.5V ±5% or 3.3V ±10%; TA= -40°C to 85°C
Symbol Parameter Condition Min Typ Max Units
VIH Input HIGH Voltage 2.0 V
VIL Input LOW Voltage 0.8 V
IIH Input HIGH Current 40 µA
IIL Input LOW Current –300 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.
5. VIH (min) not lower than 1.2V.
LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS(4)
5
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
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 Typ Max Units
fMAX Maximum Operating Frequency VIN ≥ 100mV; VOUT ≥ 200mV Clock 6 GHz
NRZ Data 10.7 Gbps
tpd Propagation Delay IN-to-Q 200 350 ps
SEL-to-Q 100 400 ps
tSKEW Channel-to-Channel Skew
(Within Bank) Note 8 20 ps
Part-to-Part Skew Note 9 75 ps
tJITTER Clock Cycle-to-Cycle Jitter Note 10 1ps
RMS
Total Jitter Note 11 10 psPP
Data Random Jitter Note 12 1ps
RMS
Deterministic Jitter Note 13 10 psPP
Crosstalk Induced Jitter Note 14 0.7 psRMS
Adjacent Channel
tr, tfOutput Rise/Fall Time 20% to 80% at full swing. 25 60 ps
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.
AC ELECTRICAL CHARACTERISTICS(7)
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 Typ Max Units
VOH Output HIGH Voltage Q0, /Q0; Q1, /Q1 VCC–0.020 VCC V
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 Ω
Notes:
6. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
CML OUTPUT DC ELECTRICAL CHARACTERISTICS(6)
6
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
TIMING DIAGRAM
/IN
IN
/Q
Q
t
pd
t
pd
V
OUT
= 400mV (typ.)
(50Ω load)
V
OUT
= 400mV (typ.)
(50Ω load)
Figure 2a. AC Timing Diagram IN-to-Q
SEL
/Q
Q
t
pd
t
pd
V
CC
/2 V
CC
/2
IN0, /IN1 = LOW, /IN0, IN1 = HIGH
V
OUT
= 400mV (typ.)
(50Ω load)
Figure 2b. AC Timing Diagram SEL-to-Q
VDIFF_IN,
VDIFF_OUT (Typ. 800mV)
Figure 1b. Differential Voltage Swing
V
IN
,
V
OUT
Typ. 400mV
Figure 1a. Single-Ended Voltage Swing
SINGLE-ENDED AND DIFFERENTIAL SWINGS
7
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
TYPICAL OPERATING CHARACTERISTICS
VCC = 2.5V, VIN = 100mV, TA = 25°C, unless otherwise noted.
195
196
197
198
199
200
201
202
203
204
205
-60 -40 -20 0 20 40 60 80 100
PROPAGATION DELAY (ps)
TEMPERATURE (°C)
Propagation Delay vs.
Temperature
175
180
185
190
195
200
205
210
215
0200 400 600 800 1000 1200
PROPAGATION DELAY (ps)
INPUT VOLTAGE SWING (mV)
Propagation Delay vs.
Input Voltage Swing
0
0.5
1
1.5
2
2.5
3
3.5
-60 -40 -20 0 20 40 60 80 100
DELTA SKEW (ps)
TEMPERATURE (°C)
Within Device Skew vs.
Temperature
0
50
100
150
200
250
300
350
400
450
500
02000 4000 6000 8000 10000
AMPLITUDE (mV)
FREQUENCY (MHz)
Frequenc
y
vs. Amplitude
8
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
FUNCTIONAL CHARACTERISTICS
VCC = 2.5V, VIN = 100mV, TA = 25°C, unless otherwise noted.
5Gbps Output
TIME (50ps/div.)
Amplitude
(100mV/div.)
223–1 PRBS
2.5GHz Output
TIME (50ps/div.)
Amplitude
(100mV/div.)
1.25GHz Output
TIME (100ps/div.)
Amplitude
(100mV/div.)
200MHz Output
TIME (600ps/div.)
Amplitude
(100mV/div.)
9
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
INPUT INTERFACE APPLICATIONS
LVPECL
IN
/IN
VT
SY58024U
VCC VCC
0.01µF
For 2.5V, Rpd = 19Ω.
For 3.3V, Rpd = 50Ω.
Rpd
Figure 4c. DC-Coupled LVPECL
Input Interface
CML IN
/IN
VT
SY58024U
VCC VCC
NC
Figure 4a. DC-Coupled CML
Input Interface
Option: may connect VT to VCC
LVPECL
IN
/IN
VT
SY58024U
V
CC
V
CC
0.01µF
R
pd
R
pd
For 2.5V, R
pd
= 50Ω, R1 = 1kΩ, R2 = 1.1kΩ.
For 3.3V, R
pd
= 100Ω, R1 = 649Ω, R2 = 1kΩ.
R1
R2
Figure 4d. AC-Coupled LVPECL
Input Interface
LVDS IN
/IN
VTNC
SY58024U
V
CC
V
CC
Figure 4e. LVDS
Input Interface
CML IN
/IN
VT
0.01µF
SY58024U
V
CC
V
CC
R1
R2
For 2.5V, R1
= 1kΩ, R2
= 1.1kΩ.
For 3.3V, R1
= 649Ω, R2
= 1kΩ.
Figure 4b. AC-Coupled CML
Input Interface
50Ω
50Ω
VCC
GND
/IN
VT
IN
Figure 3. Simplified Differential Input Buffer
INPUT STAGE
10
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
Part Number Function Data Sheet Link
SY58023U Ultra-low Jitter 2x2 Crosspoint Switch http://www.micrel.com/product-info/products/SY58023U.shtml
w/CML Outputs and Internal I/O Termination
SY58024U Ultra-low Jitter Dual 2x2 Crosspoint Switch http://www.micrel.com/product-info/products/sy58024u.shtml
w/CML Outputs and Internal I/O Termination
32-MLF Manufactering Guidelines
www.amkor.com/products/notes_papers/MLF_AppNote.pdf
Exposed Pad Application Note
HBW Solutions http://www.micrel.com/product-info/as/solutions.shtml
RELATED PRODUCT AND SUPPORT DOCUMENTATION
CML OUTPUT TERMINATION
50Ω50Ω
/Q
Q
VCC
16mA
GND
100Ω
Figure 5. CML
DC-Coupled Termination
50Ω50Ω
/Q
Q
VCC
16mA
GND
50Ω
50Ω
DC-bias
per application
Figure 6. CML
AC-Coupled 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.
11
Precision Edge®
SY58024U
Micrel, Inc.
M9999-082807
hbwhelp@micrel.com or (408) 955-1690
32-PIN MicroLeadFrame® (MLF-32)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heavy Copper Plane
Heavy Copper Plane
V
EE
V
EE
Heat Dissipation
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 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 at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2005 Micrel, Incorporated.
