Microchip | SY89843UMG

The SY89843UMG is a low jitter PECL, 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications.

The SY89843U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique Fail-Safe Input protection prvents metastable conditions when the selected input clock fails to a DC voltage

Features:

• Selects between two sources, and provides a glitch-free,stable LVPECL output
• Guaranteed AC performance over temperature and supply voltage:
• – Wide operating frequency: 1k Hz to >1.5 GHz
• – < 880 ps In-to-Out tpd
• – < 190 ps tr/tf
• Unique patent-pending input isolation design minimizes crosstalk
• Fail-Safe Input prevents oscillations
• Ultra-low jitter design:
• – <1psRMS random jitter
• – <1psRMS cycle-to-cycle jitter
• – <10psPP total jitter (clock)
• – <0.7psRMS MUX crosstalk induced jitter
• 800 mV LVPECL output swing
• 2.5 V ±5% or 3.3 V ±10% supply voltage
• –40°C to +85°C industrial temperature range
• Available in 24-pin (4mm x 4mm) MLF Package

Applications:

• Redundant clock switchover
• Failsafe clock protection