SY58023U_07 [MICREL]
ULTRA-LOW JITTER 2 】 2 CROSSPOINT SWITCH w/CML OUTPUTS AND INTERNAL I/O TERMINATION; 超低抖动2 】 2交叉点开关W / CML输出和内部I / O终端
| 型号： | SY58023U_07 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | ULTRA-LOW JITTER 2 】 2 CROSSPOINT SWITCH w/CML OUTPUTS AND INTERNAL I/O TERMINATION |
| 文件： | 总10页 (文件大小：122K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
®
ULTRA-LOW JITTER 2 × 2 CROSSPOINT
SWITCH w/CML OUTPUTS AND
INTERNAL I/O TERMINATION
®
Precision Edge
SY58023U
FEATURES
■ Guaranteed AC performance over temperature and
®
Precision Edge
voltage:
• >10.7Gbps data throughput
DESCRIPTION
• <60ps t /t times
r f
• <285ps t (IN-to-Q)
pd
The SY58023U is a 2.5V/3.3V precision, high-speed, fully
differential CML 2 × 2 crosspoint switch. The SY58023U is
optimized to provide two identical output copies with less
than 20ps of skew and ultra-low jitter. It can route clock
signals as fast as 6GHz or data up to 10.7Gbps.
• <20ps skew
■ Low jitter:
• <10ps total jitter (clock)
pp
• <1ps
random jitter (data)
rms
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the SY58023U to directly
interface to LVPECL, LVDS, and CML differential signals
• <10ps deterministic jitter (data)
pp
■ Crosstalk induced jitter: <0.7ps
rms
(AC- or DC-coupled) as small as 100mV (200mV ) without
■ Accepts an input signal as low as 100mV
pp
any level-shifting or termination resistor networks in the signal
path. The CML outputs features 400mV typical swing into
50Ω loads, and provide an extremely fast rise/fall time
guaranteed to be less than 60ps.
■ Unique input termination and V pin accepts DC-
T
coupled and AC-coupled differential inputs:
LVPECL, LVDS, and CML
■ 50Ω source terminated CML outputs
■ Fully differential inputs/outputs
The SY58023U 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 dual CML switches, consider the
SY58024U. The SY58023U is part of Micrel’s high-speed,
■ Power supply 2.5V ±5% and 3.3V ±10%
■ Industrial –40°C to +85°C temperature range
®
■ Available in 16-pin (3mm × 3mm) MLF package
®
Precision Edge product line.
Datasheets and support documentation can be found on
Micrel’s website at www.micrel.com.
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS
■ Gigabit Ethernet data/clock routing
■ SONET data/clocking routing
■ Switch fabric clock routing
■ Redundant switchover
SEL0
(TTL/CMOS)
0
IN0
VT0
Q0
50Ω
50Ω
■ Backplane redundancy
/Q0
1
/IN0
SEL1
(TTL/CMOS)
IN1
VT1
0
1
Q1
50Ω
50Ω
/Q1
/IN1
Precision Edge is a registered trademark of Micrel , Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
Rev.: F
Amendment: /0
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: February 2007
Precision Edge®
SY58023U
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Package
Type
Operating
Range
Package
Marking
Lead
Finish
16 15 14 13
Part Number
1
2
12
11
10
9
Q0
IN0
SY58023UMI
MLF-16
MLF-16
MLF-16
Industrial
Industrial
Industrial
023U
023U
Sn-Pb
Sn-Pb
/IN0
/Q0
/Q1
Q1
SY58023UMITR(2)
SY58023UMG(3)
3
4
/IN1
IN1
023U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
SY58023UMGTR(2, 3) MLF-16
Industrial
023U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
5
6
7
8
Notes:
1. Contact factory for die availability. Dice are guaranteed at TA = 25°C, DC electricals only.
2. Tape and Reel.
®
16-Pin MLF (MLF-16)
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
Pin Name
IN0, /IN0,
Pin Function
1, 2,
3, 4
Differential Signal Input: Each pin of this pair internally terminates with 50Ω to the VT pin.
Note that this input will default to an indeterminate state if left open.
See “Input Interface Applications” section.
/IN1, IN1
16, 5
15, 6
VT0, VT1
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 Applications” section.
SEL0, SEL1
Select Input: TTL/CMOS select input control that selects inputs IN0, or IN1. Note that this
input is internally connected to a 25kΩ pull-up resistor and will default to a logic High
state if left open.
7, 14
8, 13
GND,
(Exposed Pad)
Ground. Exposed pad must be connected to a ground plane that is the same potential as
the device ground pin.
VCC
Positive Power Supply: Bypass with 0.1µF 0.01µF low ESR capacitors as close to the
pins as possible.
12, 11, 10, 9
Q0, /Q0, /Q1, Q1
CML Differential Output Pairs: Differential buffered output copy of the selected input
signal. The CML output swing is typically 400mV across 100Ω. Unused output pairs may
be left floating with no impact on jitter. See “CML Output Termination” section.
TRUTH TABLE
SEL0
SEL1
Q0
Q1
L
L
L
H
L
IN0
IN0
IN1
IN1
IN0
IN1
IN0
IN1
H
H
H
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
2
Precision Edge®
SY58023U
Micrel, Inc.
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (V ) .................................. –0.5V to +4.0V Supply Voltage (V ) ............................ +2.375V to +3.60V
CC
CC
Input Voltage (V ) ......................................... –0.5V to V
Ambient Temperature (T ) ......................... –40°C to +85°C
IN
CC
A
(3)
CML Output Voltage (V
)......... V –1.0V to V +0.5V Package Thermal Resistance
OUT
CC CC
®
MLF (θ
)
Current (V )
JA
T
Still-Air .............................................................60°C/W
Source or Sink Current on V pin ................... ±100mA
T
500lfpm............................................................54°C/W
Input Current (V )
T
®
MLF (ψ
)
JB
Source or Sink Current on IN, /IN.....................±50mA
Junction-to-board ............................................38°C/W
Lead Temperature (soldering, 20 sec.) ..................... 260°C
Storage Temperature (T ) ........................... –65°C +150°C
S
(4)
DC ELECTRICAL CHARACTERISTICS
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.
100
130
mA
VIH
Input HIGH Voltage
Input LOW Voltage
Input Voltage Swing
Differential Input Swing
IN-to-VT Resistance
IN, /IN
VCC –1.2
VCC
VIH –0.1
1.7
V
V
V
V
Ω
V
VIL
IN, /IN
0
VIN
IN, /IN; see Figure 1a.
IN, /IN; see Figure 1b.
0.1
0.2
40
VDIFF_IN
RIN
50
60
IN to VT
1.28
(4)
LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= -40°C to 85°C
Symbol
VIH
Parameter
Condition
Min
Typ
Max
Units
V
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
2.0
VIL
0.8
40
V
IIH
µA
µA
IIL
–300
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. θ uses 4-layer
JA
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
hbwhelp@micrel.com or (408) 955-1690
3
Precision Edge®
SY58023U
Micrel, Inc.
(6)
CML OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = +3.3V ±10% or +2.5V ±5%; RL = 100Ω across each output pair; TA = –40°C to +85°C, unless otherwise stated.
Symbol
VOH
Parameter
Condition
Min
VCC–0.020
325
Typ
Max
VCC
500
1000
60
Units
V
Output HIGH Voltage
Output Voltage Swing
Differential Voltage Swing
Output Source Impedance
Q0, /Q0; Q1, /Q1
VOUT
Q0, /Q0; Q1, /Q1; see Figure 1a.
Q0, /Q0; Q1, /Q1; see Figure 1b.
Q0, /Q0; Q1, /Q1
400
800
50
mV
mV
Ω
VDIFF_OUT
ROUT
650
40
Notes:
6. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established
(7)
AC ELECTRICAL CHARACTERISTICS
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
IN ≥ 100mV; VOUT ≥ 200mV
Min
Typ
Max
Units
GHz
Gbps
ps
fMAX
Maximum Operating Frequency
V
Clock
6
NRZ Data 10.7
tpd
Propagation Delay
IN-to-Q
135
100
285
400
SEL-to-Q
ps
tSKEW
Channel-to-Channel Skew
(Within Bank)
Note 8
Note 9
20
ps
Part-to-Part Skew
75
1
ps
tJITTER
Clock
Data
Cycle-to-Cycle Jitter Note 10
Total Jitter Note 11
psRMS
psPP
10
1
Random Jitter Note 12
Deterministic Jitter Note 13
Crosstalk Induced Jitter
psRMS
psPP
10
Note 14
0.7
60
psRMS
ps
(Adjacent Channel)
tr, tf
Output Rise/Fall Time
20% to 80%, at full swing.
25
Notes:
7. Measured with 100mV input swing. 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, T –T
where T is the time between rising edges of the output
n
n–1
signal.
12
11. Total jitter definition: With an ideal clock input of frequency ≤ f
, no more than one output edge in 10 output edges will deviate by more than
MAX
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.
23
13. Deterministic jitter is measured at 2.5Gbps–3.2Gbps with both K28.5 and 2 –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
hbwhelp@micrel.com or (408) 955-1690
4
Precision Edge®
SY58023U
Micrel, Inc.
SINGLE-ENDED AND DIFFERENTIAL SWINGS
VDIFF_IN
,
VIN,
VOUT
Typ. 400mV
VDIFF_OUT (Typ. 800mV)
Figure 1b. Differential Voltage Swing
Figure 1a. Single-Ended Voltage Swing
TIMING DIAGRAM
/IN
IN
/Q
Q
VOUT = 400mV (typ.)
(50Ω load)
tpd
tpd
VOUT = 400mV (typ.)
(50Ω load)
Figure 2a. AC Timing Diagram IN-to-Q
VCC/2
VCC/2
SEL
/Q
tpd
tpd
V
OUT = 400mV (typ.)
(50Ω load)
Q
IN0, /IN1 = LOW, /IN0, IN1 = HIGH
Figure 2b. AC Timing Diagram SEL-to-Q
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
5
Precision Edge®
SY58023U
Micrel, Inc.
TYPICAL OPERATING CHARACTERISTICS
VCC = 2.5V, VIN = 100mV, TA = 25°C, unless otherwise noted.
Propagation Delay vs.
Temperature
Frequency vs.
Amplitude
500
205
204
203
202
201
200
199
198
197
196
195
450
400
350
300
250
200
150
100
50
0
0
2000 4000 6000 8000 10000
FREQUENCY (MHz)
-60 -40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
Propagation Delay vs.
Input Voltage Swing
Within Device Skew vs.
Temperature
215
210
205
200
195
190
185
180
175
3.5
3
2.5
2
1.5
1
0.5
0
0
200 400 600 800 1000 1200
INPUT VOLTAGE SWING (mV)
-60 -40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
6
Precision Edge®
SY58023U
Micrel, Inc.
FUNCTIONAL CHARACTERISTICS
VCC = 2.5V, VIN = 100mV, TA = 25°C, unless otherwise noted.
5Gbps Output
2.5GHz Output
223—1 PRBS
TIME (50ps/div.)
TIME (50ps/div.)
1.25GHz Output
200MHz Output
TIME (100ps/div.)
TIME (600ps/div.)
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
7
Precision Edge®
SY58023U
Micrel, Inc.
INPUT STAGE
VCC
IN
VT
50Ω
50Ω
GND
/IN
Figure 3. Simplified Differential Input Buffer
INPUT INTERFACE APPLICATIONS
VCC
VCC
VCC
VCC
VCC
VCC
IN
IN
IN
LVPECL
CML
CML
/IN
/IN
/IN
SY58023U
SY58023U
SY58023U
0.01µF
NC
VT
VT
R1
0.01µF
VT
Rpd
R2
For VCC = 2.5V, Rpd = 19Ω.
For VCC = 3.3V, Rpd = 50Ω.
For 2.5V, R1 = 1k,ΩR2 = 1.1k.Ω
For 3.3V, R1 = 649,ΩR2 = 1k.Ω
Option: may connect V to V
.
CC
T
Figure 4a. DC-Coupled CML
Input Interface
Figure 4b. AC-Coupled CML
Input Interface
Figure 4c. DC-Coupled LVPECL
Input Interface
VCC
VCC
IN
VCC
VCC
LVPECL
/IN
IN
SY58023U
Rpd
Rpd
R1
LVDS
/IN
0.01µF
SY58023U
VT
R2
NC
VT
For VCC = 2.5V, Rpd = 50Ω, R1 = 1kΩ, R2 = 1.1k Ω.
For VCC = 3.3V, Rpd = 100Ω, R1 = 649Ω, R2 = 1k Ω.
Figure 4e. LVDS
Input Interface
Figure 4d. AC-Coupled LVPECL
Input Interface
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
8
Precision Edge®
SY58023U
Micrel, Inc.
CML OUTPUT TERMINATION
Figures 5 and Figure 6 illustrates how to terminate a configuration. All outputs of the SY58023U are 50Ω with a
CML output using both the AC-coupled and DC-coupled 16mA current source.
VCC
VCC
DC-bias
per application
50Ω
50Ω
Q
50Ω
50Ω
Q
50Ω
50Ω
100Ω
/Q
/Q
16mA
16mA
GND
GND
Figure 6. CML AC-Coupled Termination
Figure 5. CML DC-Coupled Termination
RELATED PRODUCT AND SUPPORT DOCUMENTATION
Part Number
Function
Data Sheet Link
SY58023U
Ultra-low Jitter 2×2 Crosspoint Switch
http://www.micrel.com/product-info/products/sy58023u.shtml
w/CML Outputs and Internal I/O Termination
SY58024U
Ultra-low Jitter Dual 2×2 Crosspoint Switch
w/CML Outputs and Internal I/O Termination
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
16-MLF® Manufactering Guidelines
Exposed Pad Application Note
HBW Solutions
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
9
Precision Edge®
SY58023U
Micrel, Inc.
®
16-PIN MicroLeadFrame (MLF-16)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation
VEE
Heavy Copper Plane
Heavy Copper Plane
®
VEE
PCB Thermal Consideration for 16-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.
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
10
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