The SY58020U is a 2.5V/3.3V precision, high-speed, fully differential 1:4 CML fanout buffer. Optimized to provide four identical output copies with less than 15ps of skew and less than 10ps_(PP) total jitter, the SY58020U can process clock signals as fast as 6GHz.

The differential input includes Micrel’s unique, 3-pin input termination architecture interfaces to differential LVPECL, LVDS, and CML signals (AC-coupled 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 (VREF-AC) is provided to bias the VT pin. The outputs are optimized to drive 400mV typical swing into 50 Ohm loads, with extremely fast rise/fall times guaranteed to be less than 60ps.

The SY58020U 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 LVPECL outputs, consider the SY58021U or SY58022U 1:4 fanout buffer with 800mV and 400mV output swing, respectively. The SY58020U 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 1:4, 400mV CML fanout buffer
• Guaranteed AC performance over temperature/voltage:
  • > 6GHz f_MAX clock
  • < 60ps tr / tf times
  • < 250ps tpd
  • < 15ps max. skew
• Low jitter performance:
  • < 10ps_(PP) total jitter (clock)
  • < 1ps_(RMS) random jitter (data)
  • < 10ps_(PP) deterministic jitter (data)
• 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
• 50Ohm source terminated CML outputs
• Power supply 2.5V ±5% and 3.3V ±10%
• Industrial temperature range: –40°C to +85°C
• Available in 16-pin (3mm x 3mm) MLF™ package

Note 1. Contact factory for die availability.
Die are guaranteed at TA = 25°C, DC electricals only.

Note 2. Tape and Reel.

• All SONET and All GigE clock distribution
• Fibre Channel clock and data distribution
• Backplane distribution
• Data distribution: OC-48, OC-48+FEC, XAUI
• High-end, low skew, multiprocessor synchronous clock distribution