SY58034U

Micrel, Inc. 6GHz, 1:6 CML FANOUT BUFFER WITH 2:1 MUX INPUT AND INTERNAL I/O TERMINATION Precision Edge® Precision SEYd5g8e03®4U SY58034U FEATURES Provides six ultra-low skew copies of the selected input 2:1 MUX input included for clock switchover applications Guaranteed AC performance over temperature and voltage: Clock frequency range: DC to > 6GHz <290ps IN-to-OUT tpd <60ps tr / tf times <20ps skew (output-to-output) Unique input isolation design minimizes crosstalk Ultra low-jitter design: 60fs RMS phase jitter <0.7psRMS crosstalk-induced jitter Low supply voltage operation: 2.5V and 3.3V Unique input termination and VT pin accepts DCcoupled and AC-coupled inputs (CML, PECL, LVDS) Internal 50Ω output source termination 400mV CML output swing –40°C to +85°C temperature range Available in 32-pin (5mm x 5mm) QFN package Precision Edge® DESCRIPTION The SY58034U is a 2.5V/3.3V precision, high-speed 1:6 fanout buffer capable of handling clocks up to 6GHz. 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 without any level shifting or termination resistor networks in the signal path. The outputs are 50ý source terminated CML, with extremely fast rise/fall times guaranteed to be less than 60ps. The SY58034U operates from a 2.5V ±5% supply or a 3...