Microchip Technology SY89467UHY

Description
The SY89467U is a 2.5/3.3V, 1:20 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX). It features a unique FailSafe Input (FSI) protection that prevents metastable output conditions when the selected input clock fails to a DC voltage. The differential input includes Micrel's patented 3pin internal termination architecture that can interface to any differential signal (AC or DCcoupled) 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.

Features
Precision Edge® technology
Selects between two inputs and provides 20 precision LVPECL copies
FailSafe Input prevents outputs from oscillating when input is invalid
Guaranteed AC performance over temperature and supply voltage:
DCto >1.5 GHz throughput
<1200ps Propagation Delay (IntoQ)
270ps Rise/Fall times
Ultralow jitter design:
<1pSAMs random jitter
<1pSAMs cycletocycle jitter
<10psPP total jitter (clock)
<0.7pSRMS MUX crosstalk induced jitter
Unique, patented MUX input isolation design minimizes adjacent channel crosstalk
Unique patented internal termination and VT pin accepts DC and ACcoupled inputs (CML, PECL, LVDS)
Wide input voltage range: Vcc to GND
2.5V ±5% or 3.3V ±10% supply voltage
40°C to 85°C industrial temperature range
Available in 64pin TQFP package

Applications
Failsafe clock protection
SONET clock distribution
Backplane distribution
LAN/WAN
Enterprise servers
ATE
Test and measurement