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SY58021UMG

Description
Clock Fanout Buffer 4-OUT 1-IN 1:4 16-Pin QFN EP Tube
File Size631KB,13 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
Environmental Compliance
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SY58021UMG Overview

Clock Fanout Buffer 4-OUT 1-IN 1:4 16-Pin QFN EP Tube

SY58021UMG Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesCompliant
ECCN (US)EAR99
Part StatusActive
HTS8542.39.00.01
TypeFanout Buffer
Fanout1:4
Number of Outputs per Chip4
Maximum Propagation Delay Time @ Maximum CL (ns)0.3@2.375V to 3.63V
Absolute Propagation Delay Time (ns)0.3
Input Logic LevelCML|LVDS|LVPECL
Output Logic LevelLVPECL
Minimum Operating Supply Voltage (V)2.375
Typical Operating Supply Voltage (V)2.5|3.3
Maximum Operating Supply Voltage (V)3.6
Minimum Operating Temperature (°C)-40
Maximum Operating Temperature (°C)85
Supplier Temperature GradeIndustrial
PackagingTube
Pin Count16
Standard Package NameQFN
Supplier PackageQFN EP
MountingSurface Mount
Package Height0.85(Max)
Package Length3
Package Width3
PCB changed16
Lead ShapeNo Lead
SY58021U
4GHz, 1:4 LVPECL Fanout
Buffer/Translator with Internal Termination
Precision Edge
®
General Description
The SY58021U is a 2.5V/3.3V precision, high-speed, fully
differential 1:4 LVPECL fanout buffer. Optimized to provide
four identical output copies with less than 15ps output
skew and only 70 fs
RMS
phase jitter, the SY58021U can
process clock signals as fast as 4GHz.
The differential input includes Micrel’s unique, 3-pin input
termination architecture interfaces to differential LVPECL,
CML, and LVDS signals (AC- 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 (V
REFAC
)
is provided to bias the VT pin. The outputs are 100k
LVPECL compatible, with extremely fast rise/fall times
guaranteed to 70fs.
The SY58021U 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 SY58022U 1:4 fanout buffer with 400mV LVPECL
output swing, or the SY58020U 1:4 CML fanout buffer. The
®
SY58021U 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.
Precision Edge
®
Features
Precision 1:4 LVPECL fanout buffer
Low jitter performance:
70fs
RMS
phase jitter (typical)
Accepts an input signal as low as 100mV
Unique input termination and VT pin accepts DC-
coupled and AC-coupled differential inputs: LVPECL,
LVDS, and CML
100k LVPECL-compatible 800mV swing output
Power supply 2.5V
±5%
and 3.3V
±10%
• −40°C
to
+85°C
temperature range
Available in 16-pin (3mm
×
3mm) QFN package
Applications
All SONET and GigE clock distribution
Fibre Channel clock and data distribution
Backplane distribution
High-end, low-skew, multiprocessor, synchronous clock
distribution
Block Diagram
United States Patent No. RE44,134
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
September 2011
M9999-090111-B
hbwhelp@micrel.com
or (408) 955-1690

SY58021UMG Related Products

SY58021UMG SY58021UMG TR
Description Clock Fanout Buffer 4-OUT 1-IN 1:4 16-Pin QFN EP Tube Clock Fanout Buffer 4-OUT 1-IN 1:4 16-Pin QFN EP T/R
EU restricts the use of certain hazardous substances Compliant Compliant
ECCN (US) EAR99 EAR99
Part Status Active Active
HTS 8542.39.00.01 8542.39.00.01
Type Fanout Buffer Fanout Buffer
Fanout 1:4 1:4
Number of Outputs per Chip 4 4
Maximum Propagation Delay Time @ Maximum CL (ns) 0.3@2.375V to 3.63V 0.3@2.375V to 3.63V
Absolute Propagation Delay Time (ns) 0.3 0.3
Input Logic Level CML|LVDS|LVPECL CML|LVDS|LVPECL
Output Logic Level LVPECL LVPECL
Minimum Operating Supply Voltage (V) 2.375 2.375
Typical Operating Supply Voltage (V) 2.5|3.3 2.5|3.3
Maximum Operating Supply Voltage (V) 3.6 3.6
Minimum Operating Temperature (°C) -40 -40
Maximum Operating Temperature (°C) 85 85
Supplier Temperature Grade Industrial Industrial
Packaging Tube Tape and Reel
Pin Count 16 16
Standard Package Name QFN QFN
Supplier Package QFN EP QFN EP
Mounting Surface Mount Surface Mount
Package Height 0.85(Max) 0.85(Max)
Package Length 3 3
Package Width 3 3
PCB changed 16 16
Lead Shape No Lead No Lead
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