SY58012UMG [MICREL]
5GHz, 1:2 LVPECL FANOUT BUFFER/TRANSLATOR; 5GHz的， 1 ： 2的LVPECL扇出缓冲器/翻译
| 型号： | SY58012UMG |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 5GHz, 1:2 LVPECL FANOUT BUFFER/TRANSLATOR |
| 文件： | 总9页 (文件大小：134K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ꢀ
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Precision 1:2, 800mV LVPECL fanout buffer
Guaranteed AC performance over temperature/
ꢀ
Low jitter performance
ꢀ
ꢀ
Accepts an input signal as low as 100mV
Unique input termination and V pin accepts DC-
and AC-coupled differential inputs: LVPECL, LVDS,
and CML
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ꢀ
Outputs are 100k LVPECL compatible, 800mV swing
Power supply 2.5V ±5% and 3.3V ±10%
–40°C to +85°C temperature range
Available in 16-pin (3mm × 3mm) MLF package
®
5GHz, 1:2 LVPECL FANOUT
BUFFER/TRANSLATOR
WITH INTERNAL INPUT TERMINATION
®
Precision Edge
SY58012U
FEATURES
®
Precision Edge
voltage:
DESCRIPTION
• > 5GHz f
(clock)
MAX
• < 110ps t / t times
r
f
The SY58012U is a 2.5V/3.3V precision, high-speed, fully
differential 1:2 LVPECL fanout buffer. Optimized to provide
two identical output copies with less than 15ps of skew and
• < 260ps t
pd
• < 15ps max skew
less than 10ps
total jitter, the SY58012U can process
(pk-pk)
clock signals as fast as 5GHz or 5Gbps data.
• < 10ps total jitter (clock)
PP
The differential input includes Micrel’s unique, 3-pin input
termination architecture that interfaces to LVPECL, LVDS
or CML differential signals, (AC-coupled or DC-coupled) as
small as 100mV without any level-shifting or termination
resistor networks in the signal path. For AC-coupled input
interface applications, an on-board output reference voltage
• < 1ps
random jitter (data)
RMS
• < 10ps deterministic jitter (data)
PP
T
(V
) is provided to bias the V pin. The outputs are
REF-AC
T
100k LVPECL compatible, with extremely fast rise/fall times
guaranteed to be less than 110ps.
The SY58012U 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 faster rise/fall times, or greater bandwidth, consider
the SY58013U 1:2 fanout buffer with 400mV output swing,
or the SY58011 1:2 CML (400mV) fanout buffer. The
®
APPLICATIONS
®
SY58012U is part of Micrel’s high-speed, Precision Edge
product line. Data sheets and support documentation can
be found on Micrel’s web site at www.micrel.com.
■ All SONET and GigE clock distribution
■ Fibre Channel clock and data distribution
■ Backplane distribution
■ High-end, low skew, multiprocessor synchronous
clock distribution
FUNCTIONAL BLOCK DIAGRAM
TYPICAL PERFORMANCE
2.5GHz Output
VCC = 3.3V
Q0
IN
/Q0
50Ω
VT
50Ω
/IN
Q1
/Q1
VREF-AC
TIME (50ps/div.)
2GHz with 100mV Input
Precision Edge is registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
Rev.: D
Amendment: /0
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: February 2007
Precision Edge®
SY58012U
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
IN
SY58012UMI
MLF-16
MLF-16
MLF-16
Industrial
Industrial
Industrial
012U
012U
Sn-Pb
Sn-Pb
SY58012UMITR(2)
SY58012UMG(3)
VT
/Q0
/Q1
Q1
3
4
VREF-AC
/IN
012U with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
SY58012UMGTR(2, 3) MLF-16
Industrial
012U 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
Pin Function
1, 4
IN, /IN
Differential Input: This input pair is the signal to be buffered. 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.
2
3
VT
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.
VREF-AC
Reference Output Voltage: This output biases to VCC –1.2V. It is used when AC-coupling
the inputs (IN, /IN). Connect VREF-AC directly to the VT pin. Bypass with 0.01µF low ESR
capacitor to VCC. Maximum current source or sink is 0.5mA. See “Input Interface
Applications” section.
5, 8, 13, 16
6, 7, 14, 15
VCC
Positive Power Supply: Bypass with 0.1µF//0.01µF low ESR capacitors as close to the
VCC pins as possible.
GND,
Exposed Pad
Ground. Exposed pad must be connected to a ground plane that is the same potential
as the ground pin.
12, 11
9, 10
Q0, /Q0,
Q1, /Q1
LVPECL Differential Output Pairs: Differential buffered output copy of the input signal. The
output swing is typically 800mV. Unused output pairs may be left floating with no impact on
jitter. See “LVPECL Output Termination” section.
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
2
Precision Edge®
SY58012U
Micrel, Inc.
Absolute Maximum Ratings(Note 1)
Operating Ratings(Note 2)
Power Supply Voltage (V ) ...................... –0.5V to +4.0V
Power Supply Voltage (V ) ..................... 2.375V to 3.60V
CC
CC
Input Voltage (V ) ......................................... –0.5V to V
CC
IN
Operating Temperature Range (T )........... –40°C to +85°C
A
LVPECL Output Current (I
)
OUT
Package Thermal Resistance, Note 3
Continuous .............................................................50mA
Surge....................................................................100mA
®
MLF (θ
)
JA
Still-Air .............................................................60°C/W
500 lpfm...........................................................54°C/W
Source or sink current on V pin
T
V Current .......................................................... ±100mA
T
®
MLF (ψ )..........................................................33°C/W
JB
Source or sink current on IN, /IN
Input Current ........................................................±50mA
Source or sink current on V
, Note 4
REF-AC
V
Current ....................................................... ±1.5mA
REF
Soldering, (20 seconds) ............................................ 260°C
Storage Temperature Range (T ) ... –65°C to +150°C
STORE
(Note 5)
INPUT DC ELECTRICAL CHARACTERISTICS
Symbol
VCC
Parameter
Condition
Min
Typ
Max
3.60
80
Units
V
Power Supply Voltage
Power Supply Current
Input HIGH Voltage
Input LOW Voltage
Input Voltage Swing
Differential Input Voltage Swing
In to VT Resistance
2.375
ICC
Max. VCC, no load
IN, /IN
55
mA
V
VIH
VCC–1.2
VCC
VIH –0.1
1.7
VIL
IN, /IN
0
V
VIN
IN, /IN; see Figure 1a
IN,/IN; see Figure 1b
0.1
0.2
40
V
VDIFF_IN
RIN
3.4
V
50
60
Ω
IN to VT
1.28
V
VREF
Output Reference Voltage
VCC–1.3
VCC –1.2 VCC–1.1
V
-AC
(Note 5)
LVPECL OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = 3.3V ±10% or 2.5 ±5%; RL= 50Ω to VCC–2V; TA= –40°C to 85°C, unless otherwise stated.
Symbol
VOH
Parameter
Condition
Min
VCC–1.145
VCC–1.945
550
Typ
Max
Units
V
Output HIGH Voltage
Output LOW Voltage
Output Voltage Swing
Differiential Output Voltage Swing
Q0, /Q0, Q1, /Q1
VCC–0.895
VCC–1.695
VOL
Q0, /Q0, Q1, /Q1
V
VOUT
Q0, /Q0, Q1, /Q1; see Figure 1a
Q0, /Q0, Q1, /Q1; see Figure 1b
800
mV
mV
VDIFF_OUT
1100
1600
Note 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 ratings condi-
tions for extended periods may affect device reliability
Note 2. The data sheet limits are not guaranteed if the device is operated beyond the operating ratings.
Note 3. Thermal performance assumes exposed pad is soldered (or equivalent) to the device’s most negative potential on the pcb.
Note 4. Due to the limited drive capability, use for input of the same package only.
Note 5. 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®
SY58012U
Micrel, Inc.
(Note 7)
AC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA = –40°C to +85°C; RL = 50Ω to VCC–2V, unless otherwise stated.
Symbol
Parameter
Condition
Min
Typ
Max
Units
Gbps
GHz
ps
fMAX
Maximum Operating Frequency
NRZ Data
Clock
5
V
OUT ≥ 400mV
IN ≥ 100mV
5
tpd
Propagation Delay
V
110
170
3
260
15
tCHAN
tSKEW
tJITTER
Channel-to-Channel Skew
Part-to-Part Skew
Note 8
Note 9
ps
100
ps
Data
Random Jitter (RJ) Note 10
Deterministic Jitter (DJ) Note 11
1
10
psRMS
psPP
Clock
Cycle-to-Cycle Jitter Note 12
Total Jitter (TJ) Note 13
1
10
psRMS
psPP
tr, tf
Output Rise/Fall Time
20% to 80% at full output swing
35
80
110
ps
Note 7. High frequency AC Electricals are guaranteed by design and characterization.
Note 8. Skew is measured between outputs of the same bank under identical transitions.
Note 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.
Note 10. RJ is measured with a K28.7 comma detect character pattern, measured at 10.7Gbps and 2.5Gbps/3.2Gbps.
23
Note 11. DJ is measured at 10.7Gbps and 2.5Gbps/3.2Gbps with both K28.5 and 2 –1 PRBS pattern
Note 12. Cycle-to-cycle jitter definition: The variation of periods between adjacent cycles, T –T
where T is the time between rising edges of the
n–1
n
output signal.
12
Note 13. 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
MAX
than the specified peak-to-peak jitter value.
TIMING DIAGRAM
/IN
IN
/Q
Q
tpd
SINGLE-ENDED AND DIFFERENTIAL SWINGS
VDIFF_IN
,
VIN,
Typ. 800mV
VOUT
VDIFF_OUT Typ. 1.6V
Figure 1b. Differential Voltage Swing
Figure 1a. Single-Ended Voltage Swing
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
4
Precision Edge®
SY58012U
Micrel, Inc.
TYPICAL OPERATING CHARACTERISTICS
V
= 3.3V, GND = 0, V = 100mV, T = 25°C, unless otherwise stated.
CC
IN
A
Within-Device Skew vs.
Temperature
10
9
8
7
6
5
4
3
2
1
0
Frequency vs. Amplitude
800
700
600
500
400
300
200
100
0
-40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
FREQUENCY (MHz)
Propagation Delay vs.
Input Voltage Swing
Propagaton Delay vs.
Temperature
190
195
190
185
180
175
170
165
160
155
150
145
140
135
185
180
175
170
165
160
155
0
200 400 600 800 1000
INPUT VOLTAGE SWING (V)
-40 -20
0
20 40 60 80 100
TEMPERATURE (°C)
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
5
Precision Edge®
SY58012U
Micrel, Inc.
FUNCTIONAL CHARACTERISTICS
V
= 3.3V, GND = 0, V = 100mV, T = 25°C, unless otherwise stated.
CC
IN
A
5GHz Output
200MHz Output
TIME (25ps/div.)
TIME (600ps/div.)
5Gbps Output
TIME (50ps/div.)
23
(2 –1 PRBS Pattern)
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
6
Precision Edge®
SY58012U
Micrel, Inc.
INPUT STAGE
VCC
IN
VT
50Ω
50Ω
GND
/IN
Figure 2. Simplified Differential
Input Buffer
INPUT INTERFACE APPLICATIONS
VCC
VCC
VCC
VCC
VCC
VCC
IN
IN
IN
LVPECL
LVPECL
LVDS
/IN
/IN
/IN
SY58012U
SY58012U
SY58012U
Rpd
Rpd
VT
VT
NC
NC
VT
Rpd
VREF-AC
NC
VREF-AC
VREF-AC
0.01µF
0.01µF
VCC
Note:
Note:
For VCC = 3.3V system, Rpd = 100Ω
For VCC = 2.5V system, Rpd = 50Ω
For VCC = 2.5V system, Rpd = 19Ω
For VCC = 3.3V system, Rpd = 50Ω
Figure 3c. LVDS
Input Interface
Figure 3b. AC-Coupled LVPECL
Input Interface
Figure 3a. LVPECL
Input Interface
VCC
VCC
IN
CML
/IN
SY58012U
NC
NC
VT
VREF-AC
Figure 3d. DC-Coupled CML
Input Interface
Figure 3e. AC-Coupled CML
Input Interface
(option: may connect VT to VCC
)
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
7
Precision Edge®
SY58012U
Micrel, Inc.
LVPECL OUTPUT
LVPECL output have very low output impedance (open impedance transmission lines. There are several techniques
emitter), and small signal swing which results in low EMI. in terminating the LVPECL output, as shown in Figures 5
LVPECL is ideal for driving 50Ω and 100Ω controlled through 7.
+3.3V*
+3.3V
+3.3V
R1
VT = VCC —1.3V
R1
130Ω
R4
R1
130Ω
R1
130Ω
+3.3V
+3.3V
130Ω
1kΩ
+3.3V*
+3.3V*
Q
ZO = 50Ω
ZO = 50Ω
ZO = 50Ω
/Q
R3
1.6kΩ
VT = VCC —2V
R2
82Ω
R2
82Ω
VT = VCC —2V
R2
82Ω
R2
82Ω
Figure 5. Parallel Termination-Thevenin Equivalent
Figure 7. Terminating Unused I/O
Note 1. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω
Note 2. For +3.3V systems: R1 = 130Ω, R2 = 82Ω
Note 1. Unused output (/Q) must be terminated to balance the output.
Note 2. For +2.5V systems: R1 = 250Ω, R2 = 62.5Ω, R3 = 1.25kΩ,
R4 = 1.2kΩ.
For +3.3V systems: R1 = 130Ω, R2 = 82Ω, R3 = 1kΩ, R4 = 1.6kΩ.
Note 3. Unused output pairs (Q and /Q) may be left floating.
+3.3V
+3.3V
Z = 50Ω
Z = 50Ω
50Ω
50Ω
source
destination
C1
50Ω
R
b
0.01µF
(optional)
Figure 6. Three-Resistor “Y–Termination”
Note 1. Power-saving alternative to Thevenin termination.
Note 2. Placeterminationresistorsasclosetodestinationinputsaspossible.
Note 3.
R resistor sets the DC bias voltage, equal to V .
b T
For +2.5V systems R = 19Ω.
b
For +3.3V systems R = 46Ω to 50Ω.
b
Note 4. C1 is an optional bypass capacitor intended to compensate for any
t /t mismatches.
r
f
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
Part Number
Function
Data Sheet Link
SY58011U
7GHz, 1:2 CML Fanout Buffer/Translator
With Internal Input Termnations
http://www.micrel.com/product-info/products/sy58011u.shtml
SY58012U
SY58013U
5GHz, 1:2 LVPECL Fanout Buffer/Translator
With Internal Input Termination
http://www.micrel.com/product-info/products/sy58012u.shtml
http://www.micrel.com/product-info/products/sy58013u.shtml
www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf
http://www.micrel.com/product-info/as/solutions.shtml
6GHz, 1:2 Fanout Buffer/Translator w/400mV
LVPECL Outputs and Internal Terminations
16-MLF™ Manufacturing Guidelines
Exposed Pad Application Note
M-0317
HBW Solutions
M9999-020207
hbwhelp@micrel.com or (408) 955-1690
8
Precision Edge®
SY58012U
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:
Note 1. Package meets Level 2 qualification.
Note 2. All parts are dry-packaged before shipment.
Note 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 datasheet 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
9
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