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SY58022U
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DESCRIPTION
■Precision, fully differential 1:4 fanout buffer family
• SY58020U—6GHz any diff. input-to-CML
outputs (4)
• SY58021U—4GHz any diff. input-to-800mV
LVPECL outputs (4)
• SY58022U—5.5GHz any diff. input-to-400mV
LVPECL outputs (4)
■Low jitter performance:
•< 10psPP total jitter (clock)
•< 1psRMS random jitter (data)
•< 10psPP deterministic jitter (data)
■Accepts an input signal as low as 100mV
■Unique input termination and VT pin accepts
DC- and AC-coupled differential inputs: LVPECL,
LVDS, and CML
■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
FEATURES
1:4 LVPECL/CML FANOUT
BUFFER WITH
INTERNAL TERMINATION
Precision Edge®
SY58020/21/22U
EVALUATION BOARD
Rev.: D Amendment: /0
Issue Date: March 2007
The SY58020U, SY58021U, and SY58022U are
2.5V/3.3V precision, high-speed, fully differential 1:4 fanout
buffers with CML, LVPECL, and 400mV LVPECL outputs.
The SY58020U and SY58022U can process clock signals
as fast as 6GHz and 5.5GHz respectively, whereas, the
SY58021U (800mV LVPECL) can process clock signals as
fast as 4GHz.
The 1:4 fanout buffers include Micrel’s unique, 3-pin input
termination architecture that allows the devices to directly
interface to LVPECL, CML, and LVDS differential signals
(AC-coupled or DC-coupled) without any level-shifting or
termination resistor network in the signal path.
This documentation provides design and implementation
information, and a detailed description of the SY58020U,
SY58021U, and SY58022U evaluation boards. The
evaluation boards are intended to provide a convenient test
and evaluation platform.
All data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
■All SONET and all GigE clock distribution
■Fibre Channel clock and data distribution
■Backplanes
■Data distribution: OC-48, OC-48+FEC, XAUI
■High-end, low skew, multiprocessor synchronous
clock distribution
APPLICATIONS
Precision Edge is a registered trademark of Micrel, Inc.
MLF and
Micro
LeadFrame are trademarks of Amkor Technology, Inc.
2
SY58020/21/22U Evaluation Board
Micrel, Inc.
HP Power Supply
E3620A
V
CC
TRIG
VEE
U1 SY58020U
VCC = +3.3V
Agilent 86100A
Wide bandwidth
Oscilloscope DCA
IN /IN
Agilent 83752A
0.01GHz to 20GHz
Synthersizer Sweeper
HP 70004A
Display
RFOUT
CLK_IN
TRIG/CLKCLK
Agilent 70818A
0.1Gbps to 12Gbps
Error Performance
Analyzer
IN
VT
VREF-AC
/IN
Q1
/Q1
Q2
/Q2
/Q3 Q3
Q0 /Q0
Figure 1. SY58020U Evaluation Board and DC-Coupled Test Setup
(Eye Diagram and tr/tf Setup)
HP Power Supply
E3620A
VCC
TRIG
U1 SY58020U
V
CC
= +3.3V
VEE
Agilent 86100A
Wide bandwidth
Oscilloscope DCA
IN /IN
Agilent 83752A
0.01GHz to 20GHz
Synthersizer Sweeper
HP 70004A
Display
RFOUT
CLK_IN
TRIG/CLKCLK
Agilent 70818A
0.1Gbps to 12Gbps
Error Performance
Analyzer
IN
VT
VREF-AC
/IN
Q1
/Q1
Q2
/Q2
/Q3 Q3
Q0 /Q0
Figure 2. SY58020U Evaluation Board and AC-Coupled Test Setup
(Eye Diagram and tr/tf Setup)
3
SY58020/21/22U Evaluation BoardMicrel, Inc.
HP Power Supply
E3620A
V
CC
TRIG
GND
U1 SY58021/22U
+2V
Agilent 86100A
Wide bandwidth
Oscilloscope DCA
IN /IN
Agilent 83752A
0.01GHz to 20GHz
Synthersizer Sweeper
HP 70004A
Display
RFOUT
CLK_IN
TRIG/CLKCLK
Agilent 70843A
0.1Gbps to 12Gbps
Error Performance
Analyzer
IN
VT
/IN
Q1
/Q1
Q2
/Q2
/Q3 Q3
Q0 /Q0
+1.3V
V
EE
V
CC
VREF-AC
Figure 3. SY58021/22U Evaluation Board and DC-Coupled Test Setup
(Eye Diagram and tr/tf Setup)
HP Power Supply
E3620A
V
CC
TRIG
GND
U1 SY58021/22U
VCC = +3.3V
Agilent 86100A
Wide bandwidth
Oscilloscope DCA
IN /IN
Agilent 83752A
0.01GHz to 20GHz
Synthersizer Sweeper
HP 70004A
Display
RFOUT
CLK_IN
TRIG/CLKCLK
Agilent 70843A
0.1Gbps to 12Gbps
Error Performance
Analyzer
IN
VT
/IN
Q1
/Q1
Q2
/Q2
/Q3 Q3
Q0 /Q0
V
EE
V
CC
VREF-AC
Figure 4. SY58021/22U Evaluation Board and AC-Coupled Test Setup
(Eye Diagram and tr/tf Setup)
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | SY58022U |
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