SY89856U

SY89856U 2GHz, Low-Power, 1:6 LVPECL Fanout Buffer with 2:1 Input MUX and Internal Termination General Description The SY89856U is a 2.5V/3.3V precision, high-speed, 1:6 fanout capable of handling clocks up to 2.0GHz. A differential 2:1 MUX input is included for redundant clock switchover applications. The differential input includes Micrel’s unique, 3-pin input termination architecture that allows the device to interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mVpp) without any level shifting or termination resistor networks in the signal path. The outputs are LVPECL (100k, temperature compensated), with extremely fast rise/fall times guaranteed to be less than 200ps. The SY89856U operates from a 2.5V ±5% supply or a 3.3V ±10% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. The SY89856U 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. Features  6 ultra-low skew copies of the selected input  2:1 MUX input included for clock switchover applications  Low power: 225mW typical (2.5V)  2.5V to 3.3V supply voltage  Unique input isolation design minimizes crosstalk  Guaranteed AC performance over temperature and voltage:  Clock frequency range: DC to >2.0GHz  <400ps IN-to-OUT tpd  <200ps tr/tf times  <30ps skew (output-to-output)  Ultra-low jitter design:  40fs RMS phase jitter  0.7psRMS crosstalk-...