SY58034U_0708 [MICREL]
6GHz, 1:6 CML FANOUT BUFFER WITH 2:1 MUX INPUT AND INTERNAL I/O TERMINATION; 6GHz的， 1 ： 1 MUX输入和内部I / O终端： 6 CML扇出与2 BUFFER
| 型号： | SY58034U_0708 |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 6GHz, 1:6 CML FANOUT BUFFER WITH 2:1 MUX INPUT AND INTERNAL I/O TERMINATION |
| 文件： | 总11页 (文件大小：119K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Precision Edge®
SY58034U
6GHz, 1:6 CML FANOUT BUFFER
WITH 2:1 MUX INPUT AND
INTERNAL I/O TERMINATION
FEATURES
Provides six ultra-low skew copies of the selected
input
®
Precision Edge
2:1 MUX input included for clock switchover
applications
DESCRIPTION
Guaranteed AC performance over temperature and
voltage:
The SY58034U is a 2.5V/3.3V precision, high-speed 1:6
fanout buffer capable of handling clocks up to 6GHz. A
differential 2:1 MUX input is included for redundant clock
switchover applications.
• Clock frequency range: DC to > 6GHz
• <290ps IN-to-OUT t
• <60ps t / t times
pd
r
f
• <20ps skew (output-to-output)
Unique input isolation design minimizes crosstalk
Ultra low-jitter design:
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the device to interface
to any differential signal (AC- or DC-coupled) as small as
100mV without any level shifting or termination resistor
networks in the signal path. The outputs are 50ý source
terminated CML, with extremely fast rise/fall times
guaranteed to be less than 60ps.
• <1ps
random jitter
RMS
• <10ps total jitter (clock)
PP
• <1ps
cycle-to-cycle jitter
RMS
• <0.7ps
crosstalk-induced jitter
RMS
The SY58034U operates from a 2.5V ±5% supply or a
3.3V ±10% supply and is guaranteed over the full industrial
temperature range of –40°C to +85°C. For applications that
require LVPECL outputs, consider the SY58035U or
SY58036U Multiplexers. The SY58034U is part of Micrel’s
Low supply voltage operation: 2.5V and 3.3V
Unique input termination and VT pin accepts DC-
coupled and AC-coupled inputs (CML, PECL, LVDS)
Internal 50ý output source termination
400mV CML output swing
®
high-speed, Precision Edge product line.
–40°C to +85°C temperature range
All support documentation can be found on Micrel’s web
site at www.micrel.com.
®
Available in 32-pin (5mm x 5mm) MLF package
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS
1:6 Fanout
Redundant clock distribution
All SONET/SDH clock distribution
All Fibre Channel distribution
All Gigabit Ethernet clock distribution
Q0
/Q0
2:1 MUX
IN0
VT0
Q1
50Ω
50Ω
/Q1
0
1
/IN0
VREF-AC0
Q2
MUX
S
/Q2
IN1
VT1
50Ω
50Ω
Q3
/Q3
/IN1
Q4
VREF-AC1
/Q4
SEL
(TTL/CMOS)
Q5
/Q5
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
Rev.: E
Amendment: /0
M9999-082707
hbwhelp@micrel.com or (408) 955-1690
Issue Date: August 2007
1
Precision Edge®
SY58034U
Micrel, Inc.
PACKAGE/ORDERING INFORMATION
Ordering Information(1)
Package Operating
Package
Marking
Lead
Finish
32 31 30 29 28 27 26 25
Part Number
Type
Range
1
24
23
GND
VCC
Q2
/Q2
Q3
/Q3
VCC
GND
IN0
VT0
VREF-AC0
2
3
4
5
6
7
SY58034UMI
MLF-32
MLF-32
MLF-32
Industrial
Industrial
Industrial
SY58034U
SY58034U
Sn-Pb
Sn-Pb
22
21
20
19
18
SY58034UMITR(2)
SY58034UMG(3)
/IN0
IN1
VT1
SY58034U with
NiPdAu
Pb-free bar-line indicator Pb-Free
SY58034U with NiPdAu
Pb-free bar-line indicator Pb-Free
VREF-AC1
/IN1
SY58034UMGTR(2, 3) MLF-32
Industrial
8
17
9
10 11 12 13 14 15 16
Notes:
1. Contact factory for die availability. Dice are guaranteed at T = 25°C, DC electricals only.
A
®
32-Pin MLF (MLF-32)
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
PIN DESCRIPTION
Pin Number
Pin Name
Pin Function
1, 4
5, 8
IN0, /IN0
IN1, /IN1
Differential Input: These input pairs are the differential signal inputs to the device. These
inputs accept AC- or DC-coupled signals as small as 100mV. Each pin of a pair internally
terminates to a VT pin through 50ý. Note that these inputs will default to an indeterminate
state if left open. Please refer to the “Input Interface Applications” section for more details.
2, 6
31
VT0, VT1
SEL
Input Termination Center-Tap: Each side of the differential input pair terminates to a VT
pin. The VT0 and VT1 pins provide a center-tap to a termination network for maximum
interface flexibility. See “Input Interface Applications” section for more details.
This single-ended TTL/CMOS-compatible input selects the inputs to the multiplexer. Note
that this input is internally connected to a 25ký pull-up resistor and will default to a logic
HIGH state if left open. The MUX select switchover function is asynchronous.
10
NC
No connect.
11, 16, 18,
23, 25, 30
VCC
Positive Power Supply: Bypass with 0.1µF™™0.01µF low ESR capacitors and place as
close to the VCC pins as possible.
29, 28
27, 26
22, 21
20, 19
15, 14
13, 12
Q0, /Q0,
Q1, /Q1,
Q2, /Q2,
Q3, /Q3,
Q4, /Q4,
Q5, /Q5
Differential Outputs: These CML output pairs are low skew output copies of the selected
input. The output stage is optimized to deliver a 400mV swing (single-ended) into 50ý.
Each output includes a 50ý source-termination resistor, thus minimizing any return
reflections. Unused output pins may be left floating. Please refer to the “Truth Table”
for details.
9, 17, 24, 32
GND,
Ground. Ground pin and exposed pad must be connected to the same ground plane.
Exposed Pad
3, 7
VREF-AC0,
VREF-AC1
Reference Voltage: These output biases to VCC–1.2V. It is used for AC-coupling inputs
(IN, /IN). Connect VREF-AC directly to the VT pin. Bypass with 0.01µF low ESR capacitor to
VCC. See “Input Interface Applications” section. Maximum sink/source current is ±1.5mA.
Due to the limited capability, the VREF-AC pin is only intended to drive its respective VT
pin.
TRUTH TABLE
SEL
0
1
IN0 Input Selected
IN1 Input Selected
M9999-082707
hbwhelp@micrel.com or (408) 955-1690
2
Precision Edge®
SY58034U
Micrel, Inc.
Absolute Maximum Ratings(1)
Operating Ratings(2)
Power Supply Voltage (V ) ...................... –0.5V to +4.0V
Power Supply Voltage (V ) ............... +2.375V to +2.625V
CC
CC
Input Voltage (V ) .......................................... –0.5V to V
............................................................. +3.0V to +3.6V
IN
CC
CML Output Voltage (V
) ...........V –1.0V to V +0.5V
Ambient Temperature Range (T )..............–40°C to +85°C
OUT
CC
CC
A
(3)
Termination Current
Package Thermal Resistance
®
MLF (θ )
Source or sink current on VT pin ........................±100mA
Input Current
JA
Still-Air ............................................................. 35°C/W
®
MLF (ψ )
JB
Source or sink current on IN, /IN pin ....................±50mA
Source or sink current on VREF-AC pin .................±2mA
Junction-to-Board............................................ 16°C/W
Lead Temperature (soldering, 20 sec.) ..................... 260°C
Storage Temperature Range (T ) ...........–65°C to +150°C
S
(4)
DC ELECTRICAL CHARACTERISTICS
TA= –40°C to 85°C, unless otherwise stated.
Symbol
Parameter
Condition
Min
2.375
3.0
Typ
2.5
Max
2.625
3.6
Units
V
VCC
Power Supply Voltage
3.3
V
ICC
Power Supply Current
No load, max. VCC
245
100
320
mA
ý
RDIFF_IN
Differential Input Resistance
|IN–/IN|
90
110
RIN
Input Resistance (IN-to-VT)
Input HIGH Voltage (IN, /IN)
Input LOW Voltage (IN, /IN)
Input Voltage Swing (IN, /IN)
45
VCC–1.6
0
50
55
VCC
ý
VIH
Note 5
V
V
V
V
VIL
VIH–0.1
1.7
VIN
See Figure 1a.
See Figure 1b.
0.1
VDIFF_IN
Differential Input Voltage Swing
|IN, /IN|
0.2
VT IN
IN to VT (IN, /IN)
1.28
V
V
VREF-AC
Reference Voltage
VCC–1.3 VCC–1.2 VCC–1.1
Notes:
1. Permanent device damage may occur if the measurements in the “Absolute Maximum Ratings” section 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 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 on the PCB. Ψ and θ are
JB
JA
determined for a 4-layer board in a 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.
V
(min) not lower than 1.2V.
IH
M9999-082707
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3
Precision Edge®
SY58034U
Micrel, Inc.
(6)
CML OUTPUT DC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= -40°C to 85°C; RL = 100ý across each output pair or equivalent, unless otherwise stated.
Symbol
VOH
Parameter
Condition
Min
VCC–0.020
325
Typ
Max
Units
V
Output HIGH Voltage
Output Voltage Swing
Differential Output Voltage Swing
Output Source Impedance
RL = 50ý to VCC
See Figure 1a.
See Figure 1b.
VCC
VOUT
400
800
50
mV
mV
ý
VDIFF_OUT
ROUT
650
40
60
(6)
LVTTL/CMOS DC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= -40°C to 85°C, unless otherwise stated.
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
–125
–300
µA
µA
IIL
Note:
6. The circuit is designed to meet the DC specifications shown in the above table after thermal equilibrium has been established.
M9999-082707
hbwhelp@micrel.com or (408) 955-1690
4
Precision Edge®
SY58034U
Micrel, Inc.
(7)
AC ELECTRICAL CHARACTERISTICS
VCC = 2.5V ±5% or 3.3V ±10%; TA= –40°C to 85°C, RL= 100ý across each output pair, or equivalent, unless otherwise stated.
Symbol
fMAX
Parameter
Condition
Min
Typ
Max
Units
Maximum Operating Frequency
Differential Propagation Delay
Clock VOUT ž 200mV
6
7.5
GHz
tpd
(IN0 or IN1-to-Q)
140
100
220
200
65
290
400
ps
ps
(SEL-to-Q)
∆tpd Tempco Differential Propagation Delay
fs/°C
Temperature Coefficient
tSKEW
Output-to-Output Note 8
Part-to-Part Note 9
20
100
1
ps
ps
tJITTER
Clock
Cycle-to-Cycle Jitter Note 10
Random Jitter (RJ) Note 11
Total Jitter (TJ) Note 12
psRMS
psRMS
psPP
1
10
Adjacent Channel Note 13
Crosstalk-Induced Jitter
0.7
60
psRMS
ps
tr, tf
Output Rise/Fall Time
Full swing, 20% to 80%
20
Notes:
7. High frequency AC electricals are guaranteed by design and characterization.
8. Output-to-output skew is measured between outputs under identical transitions.
9. Part-to-part 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–1
n
signal.
11. Random jitter is measured with a K28.7 pattern, measured at 2.5Gbps.
12
12. Total jitter definition: with an ideal clock input of frequency - f
specified peak-to-peak jitter value.
, no more than one output edge in 10 output edges will deviate by more than the
MAX
13. Crosstalk is measured at the output while applying two similar clock frequencies that are asynchronous with respect to each other at the inputs.
SINGLE-ENDED AND DIFFERENTIAL SWINGS
VDIFF_IN
,
VIN,
VOUT
VDIFF_OUT 800mV (Typ.)
400mV (Typ.)
Figure 1a. Single-Ended Voltage Swing
Figure 1b. Differential Voltage Swing
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hbwhelp@micrel.com or (408) 955-1690
5
Precision Edge®
SY58034U
Micrel, Inc.
TIMING DIAGRAMS
IN
/IN
tpd
Q
/Q
Input-to-Q tpd
SEL
VCC/2
VCC/2
tpd
tpd
Q
/Q
SEL-to-Q tpd
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Precision Edge®
SY58034U
Micrel, Inc.
TYPICAL OPERATING CHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 100mV, RL = 100ý across the output; TA = 25°C, unless otherwise stated.
Output Swing
vs. Frequency
Propagation Delay
vs. Temperature
500
450
400
350
300
250
200
150
100
50
224
222
220
218
216
214
0
0
2000 4000 6000 8000 10000
FREQUENCY (MHz)
-40 -20
0
20 40 60 80 100
TEMPERATURE (C)
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Precision Edge®
SY58034U
Micrel, Inc.
FUNCTIONAL CHARACTERISTICS
VCC = 2.5V, GND = 0, VIN = 400mV, RL = 100ý across the output; TA = 25°C, unless otherwise stated.
200MHz Output
2.5GHz Output
TIME (600ps/div.)
TIME (50ps/div.)
5GHz Output
7GHz Output
TIME (30ps/div.)
TIME (20ps/div.)
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8
Precision Edge®
SY58034U
Micrel, Inc.
INPUT AND OUTPUT STAGES
VCC
VCC
50Ω
50Ω
IN
/Q
Q
50Ω
VT
GND
50Ω
/IN
GND
Figure 2a. Simplified Differential Input Stage
Figure 2b. Simplified CML Output Stage
INPUT INTERFACE APPLICATIONS
VCC
VCC
VCC
IN
LVPECL
IN
/IN
CML
IN
/IN
SY58034U
CML
GND
/IN
NC
VREF-AC
VT
SY58034U
VCC
SY58034U
GND
NC
NC
VREF-AC
VT
GND
VCC
0.01µF
Rpd
VREF-AC
VT
For 3.3V, Rpd = 50Ω.
For 3.5V, Rpd = 19Ω.
0.01µF
Option: May connect VT to VCC
.
Figure 3a. CML
Interface (DC-Coupled)
Figure 3b. CML
Interface (AC-Coupled)
Figure 3c. LVPECL
Interface (DC-Coupled)
VCC
VCC
IN
LVPECL
IN
/IN
LVDS
/IN
Rpd
Rpd
SY58034U
GND
SY58034U
VCC
VREF-AC
VT
GND
GND
0.01µF
NC
NC
VREF-AC
VT
For 3.3V, Rpd = 100Ω
For 2.5V, Rpd = 50Ω
Figure 3e. LVDS Interface
Figure 3d. LVPECL
Interface (AC-Coupled)
M9999-082707
hbwhelp@micrel.com or (408) 955-1690
9
Precision Edge®
SY58034U
Micrel, Inc.
OUTPUT INTERFACE APPLICATIONS
VCC
VCC
50Ω
50Ω
50Ω
50Ω
/Q
/Q
50Ω
50Ω
100Ω
DC bias point per application
Q
Q
16mA
16mA
GND
GND
Figure 5. CML AC-Coupled
Termination
Figure 4. CML DC-Coupled
Termination
RELATED MICREL PRODUCTS AND SUPPORT DOCUMENTATION
Part Number
Function
Data Sheet Link
SY58035U
4.5GHz, 1:6 LVPECL Fanout Buffer with 2:1
MUX Input and Internal Termination
http://www.micrel.com/product-info/products/sy58035u.shtml
SY58036U
6GHz, 1:6 400mV LVPECL Fanout Buffer with 2:1 http://www.micrel.com/product-info/products/sy58036u.shtml
MUX Input and Internal Termination
MLF® Application Note
www.amkor.com/products/notes_papers/MLF_AppNote_0902.pdf
www.micrel.com/product-info/products/solutions.shtml
HBW Solutions New Products and Applications
M9999-082707
hbwhelp@micrel.com or (408) 955-1690
10
Precision Edge®
SY58034U
Micrel, Inc.
®
32-PIN MicroLeadFrame (MLF-32)
Package
EP- Exposed Pad
Die
CompSide Island
Heat Dissipation
Heat Dissipation
VEE
Heavy Copper Plane
Heavy Copper Plane
®
VEE
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.
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