SY89838U
Description
The SY89838U is a low jitter, low skew, high-speed 1:8 fanout buffer with a unique, 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89838U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique fail-safe input protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 200m V). The SY89838U distributes clock frequencies from 1k Hz to 1.5GHz, guaranteed, over temperature and voltage.
The differential input includes Micrel’s unique, 3-pin input termination architecture that allows customers to interface to any differential signal (AC- or DC-coupled) as small as 200m V (400Mv PP) without any level shifting or termination resistor networks in the signal path. The outputs are 350m V patible LVDS with fast rise/fall times guaranteed...
