SM840004-11
62.5/125MHz Gigabit Ethernet, 4 Output,
Ultra-Low Jitter Clock Synthesizer General Description Features The SM840004-11 clock synthesizer was designed for Generates 4 optimized LVCMOS clock outputs
Gigabit Ethernet applications. The device design is RMS phase jitter @ 125MHz: ~55 fs (typ)
optimized for 62.5MHz and 125MHz using a standard Integrated loop filter components
25MHz fundamental parallel resonant crystal, with Operates with either a 3.3V or 2.5V supply
unparalleled stability and accuracy over the full operating Power consumption 65mA (typ @ 2.5V)
range, and provides an easy fit for Jitter and Phase Noise
standards for these high performance interfaces. Selectable output frequency: 125MHz or 62.5MHz
The SM840004-11 design includes a unique power Input frequency of 25MHz
reduction methodology, along with a patented Fundamental parallel resonant crystal interface
RotaryWaveв„ў architecture, that provides a stable clock Pin compatible with the ICS/IDT840004-11
with very low noise for optimized performance. This yields Industrial temperature range: –40°C to +85°C
an overall improved Bit Error Rate (BER) and improved
waveform integrity. Green, RoHS-compliant and PFOS-compliant
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________ Block Diagram RotaryWave is a trademark of Multigig, 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 July 2010 M9999-070110-A
hbwhelp@micrel.com or (408) 955-1690 Micrel, Inc. SM840004-11 Ordering Information(1)
Package
Type Operating
Range Package Marking SM840004-11KA K-20 Industrial 840004-11 SM840004-11KA TR K-20 Industrial 840004-11 Part Number Note: …