SY89467U

SY89467U Precision LVPECL 1:20 Fanout with 2:1 MUX and Internal Termination with Fail-Safe Input General Description The SY89467U is a 2.5/3.3V, 1:20 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX). A unique Fail-Safe Input (FSI) protection prevents metastable output conditions when the selected input clock fails to a DC voltage (when voltage between the pins of the differential input drops significantly below 100mV). The differential input includes Micrel’s unique, 3-pin internal termination architecture that can 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 800mV, LVPECL with fast rise/fall times guaranteed to be less than 270ps. The SY89467U 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 SY89467U is part of Micrel’s high-speed, Precision ...