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SY58021U

Micrel Semiconductor
Part Number SY58021U
Manufacturer Micrel Semiconductor
Description 1:4 LVPECL Fanout Buffer/Translator
Published Nov 10, 2006
Detailed Description SY58021U 4GHz, 1:4 LVPECL Fanout Buffer/Translator with Internal Termination Precision Edge® General Description The SY...
Datasheet PDF File SY58021U PDF File

SY58021U
SY58021U

Overview
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 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.
Features Precision Edge® • 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 DCcoupled 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...


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