SY89837U - Micrel Semiconductor

SY89837U PRECISION 1:8 LVPECL FANOUT BUFFER

The SY89837U is a low jitter, low skew, high-speed 1:8 fanout buffer with a unique, 2:1 differential input multiplexer (MUX) optimized for clock redundant switchover applications. Unlike standard multiplexers, the SY89837U unique 2:1 runt pulse eliminator (RPE) input MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique fail.

Features

■ Selects between two clocks, and provides 8 precision, low skew LVPECL output copies
■ Guaranteed AC performance over temperature and supply voltage:
■ Wide operating frequency: 1kHz to >1.5GHz
• <975ps in-to-out tpd
• <180ps tr/tf
• <40ps output-to-output skew
■ Unique input isolation design minimizes crosstalk
■ Ultra-low jitter design:
• 150fs RMS phase jitter
• <0.7psrms MUX crosstalk induced jitter
■ Unique input termination and VT pin accepts DC- or AC-coupled inputs (CML, PECL, LVDS)
■ 800mV LVPECL output swing
■ Power supply +2.5V ±5% or +3.3V ±10%
■
  –40°C to +85°C industrial temperat.