Microchip Technology SY89112UMY-TR

Description
The SY89112U is a lowjitter, lowskew, highspeed LVPECL 1:12 differential fanout buffer optimized for precision telecom and enterprise server distribution applications. It features a 2:1 MUX for clock switchover applications with superior isolation to minimize channeltochannel crosstalk. The SY89112U distributes clock frequencies from DC to >2 GHz ensured over temperature and voltage. It incorporates a synchronous output enable (EN) to prevent "runt" clock pulses. The differential input includes Microchip's unique, patentpending 3pin input termination architecture that directly interfaces to any differential signal (AC or DCcoupled) as small as 100 mV (200 mVpp) without any level shifting or termination resistor networks in the signal path. The outputs are 800 mV, 100K compatible LVPECL with fast rise/fall times ensured to be less than 220 ps. The SY89112U operates from a 2.5V ±5% or 3.3V ±10% supply and is ensured over the full industrial temperature range of 40°C to 85°C.

Features
Selects between 1 of 2 inputs and provides 12 precision, lowskew LVPECL output copies
Ensured AC performance over temperature and voltage:
DC to >2 GHz throughput
<550 ps propagation delay CLKtoQ
<220 ps rise/fall time
<25 ps outputtooutput skew
Ultralow jitter design:
50 fSRMS typical phase jitter
<0.7 PSRMS crosstalkinduced jitter
Unique, patentpending input termination and VT pin accepts DCcoupled and ACcoupled differential pins
Unique, patentpending 2:1 input MUX provides superior isolation to minimize channeltochannel crosstalk
800 mV, 100K LVPECL output swing
Power supply: 2.5V ±5% or 3.3V ±10%
Industrial temperature range: 40°C to 85°C
Available in 44Lead (7 mm x 7mm) VQFN package

Applications
MultiProcessor Server
SONET/SDH Clock/Data Distribution
Fibre Channel Distribution
Gigabit Ethernet Clock Distribution