SY58031U

SY58031U Ultra-Precision 1:8 CML Fanout Buffer with Internal I/O Termination General Description The SY58031U is a 2.5V/3.3V precision, high-speed, fully differential CML 1:8 fanout buffer. The SY58031U is optimized to provide eight identical output copies with less than 20ps of skew and only 75fsRMS phase jitter. It can process clock signals as fast as 6GHz. The differential input includes Micrel’s unique, 3-pin input termination architecture that allows the SY58031U to directly interface to CML, LVPECL, and LVDS differential signals (AC- or DC-coupled) without any level-shifting or termination resistor networks in the signal path. The result is a clean, stub-free, low-jitter interface solution. The CML outputs feature 400mV typical swing into 50Ω loads and provide an extremely fast rise/fall time guaranteed to be less than 60ps. The SY58031U 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 high-speed 1:8 LVPECL fanout buffers, consider the SY58032U and SY58033U. The SY58031U is part of Micrel’s high-speed, Precision Edge® product line. Datasheets and support documentation are available on Micrel’s web site at: www.micrel.com. Block Diagram IN 50Ω VT 50Ω /IN VREF-AC Q0 /Q0 Q1 /Q1 Q2 /Q2 Q3 /Q3 Q4 /Q4 Q5 /Q5 Q6 /Q6 Q7 /Q7 Precision Edge® Features Precision 1:8, 400mV CML fanout buffer Guaranteed AC performance over temperature and voltage: − Clock frequency...