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 27fsRMS of typical additive phase jitter, the SY58020U can process clock signals as fast as 6GHz. The differential input includes Micrel’s unique, 3-pin input termination architecture that interfaces to differential LVPECL, LVDS, and CML 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 (VREF-AC) is provided to bias the VT pin. The outputs are optimized to drive 400mV typical swing into 50? 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).Precision 1:4, 400mV CML fanout buffer Guaranteed AC performance over temperature/voltage: > 6GHz fMAX clock < 60ps tr / tf times < 250ps tpd < 15ps max. skew Low-jitter performance: - 27fsRMS typical additive phase jitter Accepts an input signal as low as 100mV Unique patented input termination and VT pin accepts DC-coupled and AC-coupled differential inputs: LVPECL, LVDS, and CML 50? 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) QFN package