SY89859UMY

SY89859U Precision Low-Power 8:1 MUX with Internal Termination and 1:2 LVPECL Fanout Buffer General Description The SY89859U is a low jitter, low-power, high-speed 8:1 multiplexer with a 1:2 differential fanout buffer optimized for precision telecom and enterprise server distribution applications. The SY89859U distributes clock frequencies from DC to >2.5GHz, and data rates to 2.5Gbps guaranteed over temperature and voltage. The SY89859U differential input includes Micrel’s unique, 3-pin input termination architecture that directly interfaces to any differential signal (AC- or DC-coupled) as small as 100mV (200mVpp) without level shifting or termination resistor networks in the signal path. The outputs are 800mV, 100K-compatible LVPECL with extremely fast rise/fall time guaranteed to be less than 180ps. The SY89859U features a patent-pending isolation design that significantly improves on channel-tochannel crosstalk-induced jitter performance. The SY89859U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over the full industrial temperature range of –40°C to +85°C. The SY89859U ® is part of Micrel’s high-speed, Precision Edge product line. All support documentation can be found on Micrel’s web site at: www.micrel.com. Precision Edge ® Features • Selects between 1 of 8 inputs, and provides 2 precision, low skew 100K-compatible LVPECL output copies • Low power: 150mW typ. (2.5V) • Guaranteed AC performance over temperature and voltage: – DC to >2.5Gbps – DC to >2.5GHz –