SY89228U - Micrel Semiconductor

SY89228U Clock Divider

The SY89228U is a precision, low jitter 1GHz ÷3, ÷5 clock divider with an LVPECL output. A unique FailSafe Input (FSI) protection prevents metastable output conditions when the input clock voltage swing drops significantly below 100mV or input is removed. The differential input includes Micrel’s unique, 3-pin internal termination architecture that allows the.

Features

• Accepts a high-speed input and provides a precision ÷3 and ÷5 sub-rate, LVPECL output
• Fail-Safe Input
  – Prevents oscillations when input is invalid
• Guaranteed AC performance over temperature and supply voltage:
  – DC-to >1.0GHz throughput
  – < 1500ps Propagation Delay (In-to-Q)
  – < 270ps Rise/Fall times
• Ultra-low jitter design:
  – <1psRMS random jitter
  – <1psRMS cycle-to-cycle jitter
  – <10psPP total jitter (clock)
  – <0.7psRMS MUX crosstalk induced jitter
• Unique patented internal termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS)
• Wide input voltage range VCC to .