SY89464U
Description
The SY89464U is a low jitter 1:10 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89464U’s unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique Fail Safe Input (FSI) protection prevents metastable output conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100m V). The differential input includes Micrel’s unique, 3-pin internal termination architecture that allows customers to interface to any differential signal (ACor DC-coupled) as small as 100m V (200m VPP) without any level shifting or termination resistor networks in the signal path. The outputs are 800m V, 100K-patible LVPECL with fast rise/fall times guaranteed to be less than 220ps. The SY89464U operates from a 2.5V ±5% or 3.3V ±10% supply and is guaranteed over...
