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SM843001-212 Datasheet, PDF (1/7 Pages) Micrel Semiconductor – ClockWorks Fibre Channel, 212.5MHz, Ultra-Low Jitter LVPECL Clock Frequency Synthesizer | |||
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SM843001-212
ClockWorksTM Fibre Channel, 212.5MHz,
Ultra-Low Jitter LVPECL Clock Frequency
Synthesizer
General Description
Features
The SM843001-212 is a Fibre Channel, 212.5MHz
LVPECL 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 stable clock with
very low phase noise.
Power supplies of either 2.5V or 3.3V are supported, with
superior jitter and phase noise performance. The device
synthesizes a 212.5MHz, low-noise, LVPECL output for
Fibre Channel applications. The crystal reference
frequency used is 26.5625MHz.
The SM843001-212 is an excellent replacement for IDT
FemtoClocks®, with improved waveform integrity, and
jitter.
Data sheets and support documentation can be found on
Micrelâs web site at: www.micrel.com.
⢠Generates a low jitter LVPECL output
⢠2.5V or 3.3V operating voltage
⢠Typical phase jitter ~170fs
(637kHz to 10MHz) @212.5MHz
⢠Crystal frequency: 26.5625MHz
⢠212.5MHz output frequency
⢠RMS Phase Noise @ 212.5MHz:
â 1kHz:
â119dBc/Hz
â 10kHz: â127dBc/Hz
â 100kHz: â135dBc/Hz
â 1MHz: â138dBc/Hz
â 10MHz: â160dBc/Hz
â 20MHz: â165dBc/Hz
⢠Industrial temperature range
⢠Green, RoHS-, and PFOS-compliant
⢠Available in 8-pin TSSOP
Applications
⢠Fibre Channel
⢠Storage Networking (SAN)
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Block Diagram
ClockWorks is a trademark of Micrel, Inc.
RotaryWave is a registered trademark of Multigig, Inc.
FemtoClocks is a registered trademark of IDT, Inc.
Micrel Inc. ⢠2180 Fortune Drive ⢠San Jose, CA 95131 ⢠USA ⢠tel +1 (408) 944-0800 ⢠fax + 1 (408) 474-1000 ⢠http://www.micrel.com
October 2010
M9999-100410-A
hbwhelp@micrel.com or (408) 955-1690
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