Microchip SY58021U Manual

Microchip Ikke kategoriseret SY58021U

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Side 1/13
SY58021U
4GHz, 1:4 LVPECL Fanout
Buffer/Translator with Internal Termination
Precision Edge®
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
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 fsRMS 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:
−70fsRMS 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
September 2011 M9999-090111-B
hbwhelp@micrel.com or (408) 955-1690
Precision Edge is a registered trademark of Micrel, Inc.
Micrel, Inc. SY58021U
September 2011 2 M9999-090111-B
hbwhelp@micrel.com
\Ordering Information(1)
Part Number Package Type Operating Range Package Marking Lead Finish
SY58021UMI QFN-16 Industrial 021U Sn-Pb
SY58021UMITR(2) QFN-16 Industrial 021U Sn-Pb
SY58021UMG(3) QFN-16 Industrial 021U with Pb-Free bar-line indicator Pb-Free
NiPdAu
SY58021UMGTR(2, 3) QFN-16 Industrial 021U with Pb-Free bar-line indicator Pb-Free
NiPdAu
Notes:
1. Contact factory for die availability. Dice are guaranteed at T
A = 25°C, DC electrical only.
2. Tape and Reel.
3. Pb-Free package recommended for new designs.
Pin Configuration
16-Pin QFN
or (408) 955-1690

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: SY58021U

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