Microchip Technology SY89464UMY-TR

Description
The SY89464U is a lowjitter 1:10 LVPECL fanout buffer with a 2:1 differential input multiplexer (MUX) designed for redundant source switchover applications. It features a unique 2:1 Runt Pulse Eliminator (RPE) MUX that prevents short cycles or "runt" pulses during switchover. Additionally, a FailSafe Input (FSI) protection prevents metastable output conditions when the selected input clock fails to a DC voltage.
The differential input includes Micrel's internal termination architecture, allowing for interfacing with any differential signal (AC or DCcoupled) as small as 100mV (200mVpp) without level shifting or termination resistor networks. The outputs are 800mV, 100Kcompatible 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 the full industrial temperature range of 40°C to 85°C.

Features
Precision Edge® technology
Selects between two sources and provides 10 precision LVPECL copies
Guaranteed AC performance over temperature and supply voltage:
Wide operating frequency: 1kHz to >1.5GHz
<1100ps IntoOut tpd
<220ps t/t
Unique MUX input isolation design minimizes adjacent channel crosstalk
FailSafe Input prevents oscillations
Ultralow jitter design:
<1pSAMS random jitter
<1pSAMS cycletocycle jitter
<10pspp total jitter (clock)
<0.7pSRMS MUX crosstalk induced jitter
Unique internal termination and VT pin accepts DC and ACcoupled inputs (CML, PECL, LVDS)
800mV LVPECL output
2.5V ±5% or 3.3V ±10% supply voltage
Output enable
40°C to 85°C industrial temperature range
Available in 44pin (7mm x 7mm) QFN package

Applications
Redundant clock switchover
Failsafe clock protection
LAN/WAN
Enterprise servers
Test and measurement