Micrel SM840002
The SM840002 is a dual 10-Gigabit Ethernet and Gigabit Ethernet, 62.5MHz, 125MHz, or 156.25MHz LVCMOS clock frequency synthesizer and a member of the ClockWorks™ family of devices from Micrel. It provides a low-noise timing solution for high-speed, high-accuracy synthesis of clock signals. It includes a patented RotaryWave® architecture that provides a very stable clock with very-low noise.| Part No. | SM840002 |
|---|---|
| Datasheet | SM840002 Download |
| Manufacturer |  Micrel |
| Description | Ultra-Low Jitter LVCMOS Clock Frequency Synthesizer |
| Buy | Stock & Price |
GENERAL DESCRIPTION
Power supplies of either 2.5V or 3.3V are supported, with superior jitter and phase-noise performance. The device synthesizes a 62.5MHz, 125MHz, or 156.25MHz, lownoise LVCMOS output pair for Ethernet applications. The crystal reference frequency is 25MHz. The SM840002 is an excellent replacement for IDT FemtoClocks®, with improved waveform integrity, and jitter. Data sheets and support documentation can be found on Micrel’s web site at:FEATURES
● Generates two LVCMOS outputs● Operating supply modes: − Core/Output − 3.3V/3.3V, 2.5V/2.5V
● Typical phase jitter @156.25MHz~64 fs (1.875MHz − 20MHz)
● Crystal frequency: 25MHz
● 62.5MHz, 125MHz, or 156.25MHz output frequency
● Output Skew: 12ps (maximum)
● Phase Noise @ 156.25MHz: − 1KHz: −126dBc/Hz − 10KHz: −130dBc/Hz − 100KHz: −126dBc/Hz − 1MHz: −139dBc/Hz − 10MHz: −165dBc/Hz − 20MHz: −166/dBc/Hz
● Temperature range: –40°C to +75°C
● Green-, RoHS-, and PFOS-compliant
● Available in 16-pin TSSOP
APPLICATIONS
● Gigabit Ethernet● 10-Gigabit Ethernet ClockWorks is a trademark of Micrel, Inc.
