SM840021

SM840021 125MHz Ultra-Low Jitter Clock Synthesizer General Description The SM840021 synthesizer was designed for Ethernet applications. This clock synthesizer is optimized for 125MHz using a standard 25MHz fundamental parallel resonant crystal, with unparalleled stability and accuracy over the full operating range. The SM840021 design includes a unique power reduction methodology, along with a patented RotaryWaveTM architecture that provides a very stable clock with very low noise for optimized performance yielding an overall improved Bit Error Rate (BER) and improved waveform integrity. Datasheets and support documentation can be found on Micrel’s web site at: www.micrel.com. Features • • • • • • • • • • Generates an optimized 125MHz LVCMOS Output Integrated loop filter components RMS Phase Jitter: 250 fs (typ) Operates with either a 3.3V or 2.5V supply Power consumption is