MICROCHIP SY89465UMY-TR

The SY89465U is a low-jitter, 1:10 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89465U's 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique Fail-Safe Input (FSI) protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100mV). The differential input includes a 3-pin internal termination architecture that allows customers to interface to any differential signal (AC- or DC-coupled) as small as 100mV (200mVPP) without any level shifting or termination resistor networks in the signal path. The outputs are LVDS-compatible with fast rise/fall times guaranteed to be less than 220ps. The SY89465U operates from a 2.5V±5% supply and is guaranteed over the full industrial temperature range of -40°C to +85°C.

• Selects between two sources, and provides 10 precision LVDS copies
• Guaranteed AC performance over temperature and supply voltage
• Wide operating frequency: 1kHz to >1.5GHz
• <1200ps In-to-Out tpd
• <220ps tr/tf
• Unique, patent-pending input isolation design minimizes adjacent channel crosstalk
• Fail-Safe Input prevents oscillations
• Ultra-low jitter design:
  • 183 fsRMS phase jitter (typical)
  • <0.7psRMS MUX crosstalk-induced jitter
• Unique patented input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
• 325mV LVDS output swing
• 2.5V±5% supply voltage
• -40°C to +85°C industrial temperature range
• Output enable
• Available in 44-pin 7mm×7mm QFN package

• Redundant clock switchover
• Fail-safe clock protection