SM843256
10 Gigabit Ethernet and SONET, 6 output,
Ultra-Low Jitter LVPECL Frequency
Synthesizer General Description Features The SM843256 provides a low-noise timing solution for
high speed, high accuracy synthesis of clock signals.
Common applications include SONET, Gigabit Ethernet,
10 Gigabit Ethernet, and similar networking standards. It
includes a unique power reduction methodology, along
with a patented RotaryWaveTM architecture that provides a
very stable clock with very low noise.
Power supplies of either 3.3V or 2.5V are supported, with
superior jitter and phase noise performance. The device
synthesizes different low noise LVPECL output
frequencies such as 125MHz, 156.25MHz, 312.5MHz, and
625MHz for Ethernet applications; 77.76MHz, 155.52MHz,
311.04MHz, and 622.08MHz for SONET applications. The
crystal reference frequencies used include 25MHz and
19.44Mhz for Ethernet and SONET applications,
respectively.
The SM843256 is an excellent replacement for IDT Femtoclocks, with improved accuracy, power consumption,
waveform integrity, and jitter.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com. Generates six LVPECL outputs 2.5V or 3.3V operating range Typical phase jitter @ 156.25MHz …
